FZUS52 KKEY 160918
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
418 AM EST Tue Dec 16 2025
Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef
to south of Dry Tortugas, and the extreme southeastern Gulf of
America, including The Florida Keys National Marine Sanctuary
Seas are given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.
Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.
GMZ005-162130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 AM EST Tue Dec 16 2025
.SYNOPSIS...In the wake of the recent cold front passage, fresh to
strong breezes will continue for at least another day. As an area
of high pressure slides into the central North Atlantic by
Wednesday night, breezes will slacken for the second half of the
week. A second, weaker front will push through the Florida Keys
coastal waters by the end of the week, with modestly freshened
breezes expected for the weekend behind the front.
The Approximate Shoreward Edge of the Gulf Stream as of December 15...
26 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
16 NM Southeast of Sombrero Key Light...off Marathon.
13 NM Southeast of Alligator Reef Light...off Islamorada.
7 NM Southeast of Molasses Reef Light...off Key Largo.
3 NM Southeast of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT and RTOFS.
$$
GMZ031-162130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Bay waters rough, becoming choppy.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, decreasing to near
10 knots. Bay waters a light to moderate chop, becoming a light
chop.
.THURSDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Isolated showers.
.THURSDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.
.FRIDAY...Southwest to west winds near 5 knots, becoming west to
northwest. Bay waters smooth. Isolated showers.
.FRIDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
north to northeast. Bay waters smooth to a light chop. Isolated
showers.
.SATURDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.
$$
GMZ032-035-162130-
Bayside and Gulfside from Craig Key to west end of Seven Mile
Bridge-
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. West of the
Marquesas Keys, seas 5 to 6 feet, occasionally to 8 feet,
subsiding to around 4 feet, occasionally to 5 feet. Nearshore
waters rough, becoming choppy. Isolated showers.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to around 2 feet. Nearshore waters choppy, becoming a
moderate chop.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore
waters a moderate chop, becoming a light to moderate chop.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, decreasing to near
10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore
waters a light to moderate chop, becoming a light chop.
.THURSDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY NIGHT...East to southeast winds near 10 knots, becoming
southeast to south and decreasing to near 5 knots. Seas around 1
foot. Nearshore waters a light chop, becoming smooth. Isolated
showers.
.FRIDAY...Southwest to west winds near 5 knots, becoming
northwest to north. Seas 1 foot or less. Nearshore waters smooth.
Isolated showers.
.FRIDAY NIGHT...North winds increasing to near 10 knots. Seas 1
foot or less. Nearshore waters becoming a light chop. Isolated
showers.
.SATURDAY...Northeast to east winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
$$
GMZ042>044-162130-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet, except 4 to 6 feet, occasionally to
8 feet west of Cosgrove Shoal Light. Nearshore waters rough.
Isolated showers.
.TONIGHT...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore
waters rough, becoming choppy.
.WEDNESDAY...East winds decreasing to near 15 knots. Seas
subsiding to 2 to 3 feet. Nearshore waters becoming a moderate
chop.
.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to
15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop. Isolated showers.
.THURSDAY...East to southeast winds decreasing to near 10 knots.
Seas 1 to 2 feet. Nearshore waters becoming a light chop.
Isolated showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south to
southwest and decreasing to near 5 knots. Seas 1 to 2 feet,
subsiding to around 1 foot. Nearshore waters smooth to a light
chop, becoming a light chop. Isolated showers.
.FRIDAY...West to northwest winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers.
.FRIDAY NIGHT...North to northeast winds increasing to near 10
knots. Seas 1 foot or less. Nearshore waters becoming a light
chop. Isolated showers.
.SATURDAY...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.
$$
GMZ052>055-072>075-162130-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast to east 6 feet at
8 seconds and northwest 2 feet at 7 seconds. Scattered showers.
.TONIGHT...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast to east 6 feet at 7 seconds. Isolated showers.
.WEDNESDAY...East winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 7 seconds. Isolated showers.
.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to
15 knots. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2
to 3 feet. Isolated showers.
.THURSDAY...East to southeast winds 10 to 15 knots. Seas around 2
feet. Isolated showers.
.THURSDAY NIGHT...Southeast winds near 10 knots, becoming variable
and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Isolated
showers.
.FRIDAY...Variable winds near 5 knots, becoming northwest to
north. Seas around 1 foot. Isolated showers.
.FRIDAY NIGHT...North to northeast winds 5 to 10 knots, increasing
to near 10 knots. Seas 1 to 2 feet. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
$$
GMZ033-034-162130-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: Northeast 5 feet at 6 seconds.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: Northeast to east 4 feet at 5 seconds. Isolated showers.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast to east 4 feet at 5 seconds. Isolated showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.THURSDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet. Isolated showers.
.THURSDAY NIGHT...East to southeast winds near 10 knots, becoming
south to southwest and decreasing to 5 to 10 knots. Seas 1 to 2
feet. Isolated showers.
.FRIDAY...Northwest winds 5 to 10 knots, becoming north. Seas
around 1 foot. Isolated showers.
.FRIDAY NIGHT...North to northeast winds near 10 knots, increasing
to 10 to 15 knots. Seas 1 to 2 feet. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots, becoming east
and decreasing to near 10 knots. Seas 1 to 2 feet. Isolated
showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers.
$$
DP
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
418 AM EST Tue Dec 16 2025
Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef
to south of Dry Tortugas, and the extreme southeastern Gulf of
America, including The Florida Keys National Marine Sanctuary
Seas are given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.
Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.
GMZ005-162130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 AM EST Tue Dec 16 2025
.SYNOPSIS...In the wake of the recent cold front passage, fresh to
strong breezes will continue for at least another day. As an area
of high pressure slides into the central North Atlantic by
Wednesday night, breezes will slacken for the second half of the
week. A second, weaker front will push through the Florida Keys
coastal waters by the end of the week, with modestly freshened
breezes expected for the weekend behind the front.
The Approximate Shoreward Edge of the Gulf Stream as of December 15...
26 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
16 NM Southeast of Sombrero Key Light...off Marathon.
13 NM Southeast of Alligator Reef Light...off Islamorada.
7 NM Southeast of Molasses Reef Light...off Key Largo.
3 NM Southeast of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT and RTOFS.
$$
GMZ031-162130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Bay waters rough, becoming choppy.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, decreasing to near
10 knots. Bay waters a light to moderate chop, becoming a light
chop.
.THURSDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Isolated showers.
.THURSDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.
.FRIDAY...Southwest to west winds near 5 knots, becoming west to
northwest. Bay waters smooth. Isolated showers.
.FRIDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
north to northeast. Bay waters smooth to a light chop. Isolated
showers.
.SATURDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.
$$
GMZ032-035-162130-
Bayside and Gulfside from Craig Key to west end of Seven Mile
Bridge-
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. West of the
Marquesas Keys, seas 5 to 6 feet, occasionally to 8 feet,
subsiding to around 4 feet, occasionally to 5 feet. Nearshore
waters rough, becoming choppy. Isolated showers.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to around 2 feet. Nearshore waters choppy, becoming a
moderate chop.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore
waters a moderate chop, becoming a light to moderate chop.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, decreasing to near
10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore
waters a light to moderate chop, becoming a light chop.
.THURSDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY NIGHT...East to southeast winds near 10 knots, becoming
southeast to south and decreasing to near 5 knots. Seas around 1
foot. Nearshore waters a light chop, becoming smooth. Isolated
showers.
.FRIDAY...Southwest to west winds near 5 knots, becoming
northwest to north. Seas 1 foot or less. Nearshore waters smooth.
Isolated showers.
.FRIDAY NIGHT...North winds increasing to near 10 knots. Seas 1
foot or less. Nearshore waters becoming a light chop. Isolated
showers.
.SATURDAY...Northeast to east winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
$$
GMZ042>044-162130-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet, except 4 to 6 feet, occasionally to
8 feet west of Cosgrove Shoal Light. Nearshore waters rough.
Isolated showers.
.TONIGHT...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore
waters rough, becoming choppy.
.WEDNESDAY...East winds decreasing to near 15 knots. Seas
subsiding to 2 to 3 feet. Nearshore waters becoming a moderate
chop.
.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to
15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop. Isolated showers.
.THURSDAY...East to southeast winds decreasing to near 10 knots.
Seas 1 to 2 feet. Nearshore waters becoming a light chop.
Isolated showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south to
southwest and decreasing to near 5 knots. Seas 1 to 2 feet,
subsiding to around 1 foot. Nearshore waters smooth to a light
chop, becoming a light chop. Isolated showers.
.FRIDAY...West to northwest winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers.
.FRIDAY NIGHT...North to northeast winds increasing to near 10
knots. Seas 1 foot or less. Nearshore waters becoming a light
chop. Isolated showers.
.SATURDAY...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.
$$
GMZ052>055-072>075-162130-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast to east 6 feet at
8 seconds and northwest 2 feet at 7 seconds. Scattered showers.
.TONIGHT...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast to east 6 feet at 7 seconds. Isolated showers.
.WEDNESDAY...East winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 7 seconds. Isolated showers.
.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to
15 knots. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2
to 3 feet. Isolated showers.
.THURSDAY...East to southeast winds 10 to 15 knots. Seas around 2
feet. Isolated showers.
.THURSDAY NIGHT...Southeast winds near 10 knots, becoming variable
and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Isolated
showers.
.FRIDAY...Variable winds near 5 knots, becoming northwest to
north. Seas around 1 foot. Isolated showers.
.FRIDAY NIGHT...North to northeast winds 5 to 10 knots, increasing
to near 10 knots. Seas 1 to 2 feet. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
$$
GMZ033-034-162130-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
418 AM EST Tue Dec 16 2025
...SMALL CRAFT ADVISORY IN EFFECT...
.TODAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: Northeast 5 feet at 6 seconds.
.TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: Northeast to east 4 feet at 5 seconds. Isolated showers.
.WEDNESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast to east 4 feet at 5 seconds. Isolated showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.THURSDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet. Isolated showers.
.THURSDAY NIGHT...East to southeast winds near 10 knots, becoming
south to southwest and decreasing to 5 to 10 knots. Seas 1 to 2
feet. Isolated showers.
.FRIDAY...Northwest winds 5 to 10 knots, becoming north. Seas
around 1 foot. Isolated showers.
.FRIDAY NIGHT...North to northeast winds near 10 knots, increasing
to 10 to 15 knots. Seas 1 to 2 feet. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots, becoming east
and decreasing to near 10 knots. Seas 1 to 2 feet. Isolated
showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers.
$$
DP