FZUS52 KKEY 190934
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
434 AM EST Fri Dec 19 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.
GMZ005-192145-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
434 AM EST Fri Dec 19 2025
.SYNOPSIS...A weak front will push through the Florida Keys
coastal waters today, and our generally light to gentle westerly
breezes this morning will veer to the north by tonight. Modestly
freshened breezes are expected for the weekend in its wake.
Another high building over the Eastern Seaboard will support fresh
to strong breezes for early to mid week.
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.
$$
GMZ031-192145-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots, becoming west to
northwest and increasing to 5 to 10 knots. Bay waters smooth,
becoming smooth to a light chop. Patchy fog early this morning.
Isolated showers.
.TONIGHT...Northwest to north winds near 10 knots, becoming north.
Bay waters a light chop.
.SATURDAY...North to northeast winds near 10 knots. Bay waters a
light chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Bay
waters a light chop.
.SUNDAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Bay waters a light chop, becoming a light to moderate
chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Bay waters a light to moderate chop, becoming a moderate
chop.
.MONDAY...Northeast winds increasing to 15 to 20 knots. Bay
waters becoming choppy.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Northeast to east winds 15
to 20 knots. Bay waters choppy.
$$
GMZ032-035-192145-
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-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots early, becoming west
to northwest and increasing to 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth, becoming smooth to a light chop.
Patchy fog early this morning. Isolated showers.
.TONIGHT...Northwest to north winds near 10 knots, becoming north
and increasing to 10 to 15 knots. Seas around 1 foot, building to 1
to 2 feet. Nearshore waters a light chop, becoming a light to
moderate chop.
.SATURDAY...North to northeast winds 10 to 15 knots, becoming
northeast to east and decreasing to near 10 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop, becoming a light
chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.SUNDAY...Northeast winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a
light to moderate chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop, becoming a moderate chop.
.MONDAY...Northeast to east winds 15 to 20 knots. Seas 1 to
2 feet, building to 2 to 3 feet. Nearshore waters choppy.
.MONDAY NIGHT...Northeast to east winds near 20 knots. Seas 2 to
3 feet, except building to 3 to 4 feet, occasionally to 5 feet
west of the Marquesas Keys. Nearshore waters rough.
.TUESDAY...Northeast to east winds decreasing to 15 to 20 knots.
Seas 2 to 3 feet. West of the Marquesas Keys, seas 3 to 4 feet,
occasionally to 5 feet, subsiding to around 3 feet. Nearshore
waters becoming choppy. Isolated showers.
.TUESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 3 feet. Nearshore waters choppy.
$$
GMZ042>044-192145-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots, becoming west to
northwest and increasing to 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth, becoming smooth to a light chop.
Isolated showers.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming a light to moderate chop.
.SATURDAY...Northeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters a light to moderate chop, becoming a
light chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.SUNDAY...Northeast winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a light
to moderate chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
15 to 20 knots. Seas 2 to 3 feet. Nearshore waters a light to
moderate chop, becoming choppy. Isolated showers.
.MONDAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy.
.MONDAY NIGHT...Northeast to east winds increasing to near 20
knots. Seas building to 3 to 5 feet, occasionally to 6 feet.
Nearshore waters rough. Isolated showers.
.TUESDAY...Northeast to east winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Nearshore waters rough. Isolated
showers.
.TUESDAY NIGHT...Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet.
Nearshore waters rough, becoming choppy.
$$
GMZ052>055-072>075-192145-
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-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds 5 to 10 knots early, becoming
west to northwest and increasing to near 10 knots. Seas 1 to 2
feet. Wave Detail: Northeast to east 2 feet at 5 seconds and
northwest 1 foot at 2 seconds. Isolated showers and thunderstorms.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 2
to 3 feet. Wave Detail: North 2 feet at 3 seconds. Isolated
showers.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: North to northeast 2 feet at 4 seconds. Isolated
showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.
.SUNDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas around 3 feet. Isolated showers.
.SUNDAY NIGHT...Northeast winds near 15 knots, increasing to 15
to 20 knots. Seas building to 3 to 5 feet, occasionally to 6
feet. Isolated showers.
.MONDAY...Northeast winds increasing to near 20 knots. Seas
building to 5 to 7 feet, occasionally to 9 feet. Isolated
showers.
.MONDAY NIGHT AND TUESDAY...Northeast to east winds 20 to 25
knots. Seas 6 to 9 feet, occasionally to 11 feet. Isolated
showers.
.TUESDAY NIGHT...Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas subsiding to 5 to 7 feet, occasionally to
9 feet. Isolated showers.
$$
GMZ033-034-192145-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
434 AM EST Fri Dec 19 2025
.TODAY...West winds 5 to 10 knots, becoming northwest to north
and increasing to near 10 knots. Seas around 1 foot. Wave Detail:
Southwest to west 1 foot at 3 seconds. Isolated showers.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to
around 2 feet. Wave Detail: Northwest 2 feet at 4 seconds.
.SATURDAY...North to northeast winds 10 to 15 knots, becoming
northeast and decreasing to near 10 knots. Seas around 2 feet.
Wave Detail: Northwest to north 3 feet at 5 seconds.
.SATURDAY NIGHT...Northeast winds near 10 knots. Seas around 2
feet.
.SUNDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT...Northeast winds near 10 knots, becoming northeast
to east and increasing to 10 to 15 knots. Seas 1 to 2 feet,
building to around 2 feet.
.MONDAY...Northeast to east winds near 15 knots, increasing to 15
to 20 knots. Seas around 2 feet, building to 2 to 4 feet,
occasionally to 5 feet.
.MONDAY NIGHT AND TUESDAY...Northeast to east winds 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.TUESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet.
$$
DP
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
434 AM EST Fri Dec 19 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.
GMZ005-192145-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
434 AM EST Fri Dec 19 2025
.SYNOPSIS...A weak front will push through the Florida Keys
coastal waters today, and our generally light to gentle westerly
breezes this morning will veer to the north by tonight. Modestly
freshened breezes are expected for the weekend in its wake.
Another high building over the Eastern Seaboard will support fresh
to strong breezes for early to mid week.
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.
$$
GMZ031-192145-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots, becoming west to
northwest and increasing to 5 to 10 knots. Bay waters smooth,
becoming smooth to a light chop. Patchy fog early this morning.
Isolated showers.
.TONIGHT...Northwest to north winds near 10 knots, becoming north.
Bay waters a light chop.
.SATURDAY...North to northeast winds near 10 knots. Bay waters a
light chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Bay
waters a light chop.
.SUNDAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Bay waters a light chop, becoming a light to moderate
chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Bay waters a light to moderate chop, becoming a moderate
chop.
.MONDAY...Northeast winds increasing to 15 to 20 knots. Bay
waters becoming choppy.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Northeast to east winds 15
to 20 knots. Bay waters choppy.
$$
GMZ032-035-192145-
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-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots early, becoming west
to northwest and increasing to 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth, becoming smooth to a light chop.
Patchy fog early this morning. Isolated showers.
.TONIGHT...Northwest to north winds near 10 knots, becoming north
and increasing to 10 to 15 knots. Seas around 1 foot, building to 1
to 2 feet. Nearshore waters a light chop, becoming a light to
moderate chop.
.SATURDAY...North to northeast winds 10 to 15 knots, becoming
northeast to east and decreasing to near 10 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop, becoming a light
chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.SUNDAY...Northeast winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a
light to moderate chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop, becoming a moderate chop.
.MONDAY...Northeast to east winds 15 to 20 knots. Seas 1 to
2 feet, building to 2 to 3 feet. Nearshore waters choppy.
.MONDAY NIGHT...Northeast to east winds near 20 knots. Seas 2 to
3 feet, except building to 3 to 4 feet, occasionally to 5 feet
west of the Marquesas Keys. Nearshore waters rough.
.TUESDAY...Northeast to east winds decreasing to 15 to 20 knots.
Seas 2 to 3 feet. West of the Marquesas Keys, seas 3 to 4 feet,
occasionally to 5 feet, subsiding to around 3 feet. Nearshore
waters becoming choppy. Isolated showers.
.TUESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 3 feet. Nearshore waters choppy.
$$
GMZ042>044-192145-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds near 5 knots, becoming west to
northwest and increasing to 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth, becoming smooth to a light chop.
Isolated showers.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming a light to moderate chop.
.SATURDAY...Northeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters a light to moderate chop, becoming a
light chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.SUNDAY...Northeast winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a light
to moderate chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
15 to 20 knots. Seas 2 to 3 feet. Nearshore waters a light to
moderate chop, becoming choppy. Isolated showers.
.MONDAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy.
.MONDAY NIGHT...Northeast to east winds increasing to near 20
knots. Seas building to 3 to 5 feet, occasionally to 6 feet.
Nearshore waters rough. Isolated showers.
.TUESDAY...Northeast to east winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Nearshore waters rough. Isolated
showers.
.TUESDAY NIGHT...Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet.
Nearshore waters rough, becoming choppy.
$$
GMZ052>055-072>075-192145-
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-
434 AM EST Fri Dec 19 2025
.TODAY...Southwest to west winds 5 to 10 knots early, becoming
west to northwest and increasing to near 10 knots. Seas 1 to 2
feet. Wave Detail: Northeast to east 2 feet at 5 seconds and
northwest 1 foot at 2 seconds. Isolated showers and thunderstorms.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 2
to 3 feet. Wave Detail: North 2 feet at 3 seconds. Isolated
showers.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: North to northeast 2 feet at 4 seconds. Isolated
showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.
.SUNDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas around 3 feet. Isolated showers.
.SUNDAY NIGHT...Northeast winds near 15 knots, increasing to 15
to 20 knots. Seas building to 3 to 5 feet, occasionally to 6
feet. Isolated showers.
.MONDAY...Northeast winds increasing to near 20 knots. Seas
building to 5 to 7 feet, occasionally to 9 feet. Isolated
showers.
.MONDAY NIGHT AND TUESDAY...Northeast to east winds 20 to 25
knots. Seas 6 to 9 feet, occasionally to 11 feet. Isolated
showers.
.TUESDAY NIGHT...Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas subsiding to 5 to 7 feet, occasionally to
9 feet. Isolated showers.
$$
GMZ033-034-192145-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
434 AM EST Fri Dec 19 2025
.TODAY...West winds 5 to 10 knots, becoming northwest to north
and increasing to near 10 knots. Seas around 1 foot. Wave Detail:
Southwest to west 1 foot at 3 seconds. Isolated showers.
.TONIGHT...North winds near 10 knots, becoming north to northeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to
around 2 feet. Wave Detail: Northwest 2 feet at 4 seconds.
.SATURDAY...North to northeast winds 10 to 15 knots, becoming
northeast and decreasing to near 10 knots. Seas around 2 feet.
Wave Detail: Northwest to north 3 feet at 5 seconds.
.SATURDAY NIGHT...Northeast winds near 10 knots. Seas around 2
feet.
.SUNDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT...Northeast winds near 10 knots, becoming northeast
to east and increasing to 10 to 15 knots. Seas 1 to 2 feet,
building to around 2 feet.
.MONDAY...Northeast to east winds near 15 knots, increasing to 15
to 20 knots. Seas around 2 feet, building to 2 to 4 feet,
occasionally to 5 feet.
.MONDAY NIGHT AND TUESDAY...Northeast to east winds 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.TUESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet.
$$
DP