FZUS52 KKEY 280921
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
421 AM EST Sun Dec 28 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.
GMZ005-282130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
421 AM EST Sun Dec 28 2025
.SYNOPSIS...High pressure will meander in the eastern Gulf over
the next few days, resulting in light to gentle breezes. Mainland
nocturnal land breezes may drive brief bouts of gentle to moderate
northerlies through the early morning hours. A cold front is
expected to push southeastwards across Keys waters Tuesday through
Tuesday night. This will lead to freshening northerly breezes
throughout all the Florida Keys coastal waters. While Small Craft
Advisories cannot be ruled out, they are not expected at this
time.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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.
$$
GMZ031-282130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast to east winds near 10 knots, becoming northeast
near 5 knots. Bay waters a light chop, becoming smooth.
.TONIGHT...Northeast winds near 5 knots, becoming north to
northeast after midnight. Bay waters smooth.
.MONDAY...Variable winds near 5 knots. Bay waters smooth.
.MONDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest near 10 knots. Bay waters smooth to a light chop,
becoming a light chop.
.TUESDAY...Northwest to north winds 5 to 10 knots, becoming
northwest near 15 knots late. Bay waters smooth to a light chop,
becoming a moderate chop. Isolated showers.
.TUESDAY NIGHT...Northwest to north winds increasing to 15 to 20
knots. Bay waters becoming choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, becoming northwest to
north near 10 knots in the afternoon. Bay waters choppy, becoming
a light chop.
.WEDNESDAY NIGHT...Northwest to north winds 10 to 15 knots. Bay
waters a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...Northwest to north winds 10 to 15
knots. Bay waters a light to moderate chop.
$$
GMZ032-035-282130-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
421 AM EST Sun Dec 28 2025
.TODAY...North to northeast winds near 10 knots, becoming
northeast to east near 5 knots. Seas 1 foot or less. Nearshore
waters a light chop, becoming smooth.
.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.MONDAY...North to northeast winds near 5 knots, becoming
northwest to north. Seas 1 foot or less. Nearshore waters smooth.
.MONDAY NIGHT...Northwest winds near 5 knots, increasing to 5 to
10 knots. Seas 1 foot or less, then 1 foot or less after midnight.
Nearshore waters smooth, becoming smooth to a light chop.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots in the afternoon. Seas 1 foot or less, building to
2 to 3 feet. Nearshore waters a light to moderate chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Isolated
showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, subsiding to 2 to 3 feet. Nearshore
waters choppy, becoming a light to moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas subsiding to 1
to 2 feet, except subsiding to 2 to 3 feet west of the Marquesas
Keys. Nearshore waters a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters a light to moderate chop.
$$
GMZ042>044-282130-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
421 AM EST Sun Dec 28 2025
.TODAY...North winds near 10 knots, becoming northeast to east 5
to 10 knots. Seas 1 foot or less. Nearshore waters a light chop,
becoming smooth to a light chop.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop.
.MONDAY...North to northeast winds near 5 knots, becoming
variable. Seas around 1 foot. Nearshore waters smooth.
.MONDAY NIGHT...Northwest winds increasing to 5 to 10 knots. Seas
around 1 foot. Nearshore waters becoming smooth to a light chop.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots late. Seas around 1 foot. West of Cosgrove Shoal
Light, seas 1 foot, building to 2 to 3 feet. Nearshore waters a
light to moderate chop, becoming a moderate chop. Isolated
showers.
.TUESDAY NIGHT...Northwest to north winds increasing to 15 to 20
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters becoming
choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters a light to
moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters
a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters a light to moderate chop.
$$
GMZ052>055-072>075-282130-
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-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet.
Wave Detail: Northeast to east 2 feet at 4 seconds.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 to 2
feet. Wave Detail: East 2 feet at 4 seconds.
.MONDAY...Northeast to east winds near 5 knots, becoming
variable. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4 seconds.
.MONDAY NIGHT...Winds becoming northwest to north 5 to 10 knots.
Seas around 1 foot.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots late. Seas building to 2 to 4 feet. Isolated
showers.
.TUESDAY NIGHT...Northwest to north winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to
4 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas subsiding to 2
to 3 feet. Isolated showers.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 2
to 3 feet.
$$
GMZ033-034-282130-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 2 seconds.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: East 1 foot at 3 seconds.
.MONDAY...North to northeast winds near 5 knots, becoming
northwest to north. Seas 1 foot or less.
.MONDAY NIGHT...Northwest to north winds 5 to 10 knots, increasing
to near 10 knots late. Seas 1 foot or less.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing
to 15 to 20 knots in the afternoon. Seas 1 to 2 feet, building to
3 to 5 feet. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, subsiding to 3 to 4 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 2
to 3 feet.
$$
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
421 AM EST Sun Dec 28 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.
GMZ005-282130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
421 AM EST Sun Dec 28 2025
.SYNOPSIS...High pressure will meander in the eastern Gulf over
the next few days, resulting in light to gentle breezes. Mainland
nocturnal land breezes may drive brief bouts of gentle to moderate
northerlies through the early morning hours. A cold front is
expected to push southeastwards across Keys waters Tuesday through
Tuesday night. This will lead to freshening northerly breezes
throughout all the Florida Keys coastal waters. While Small Craft
Advisories cannot be ruled out, they are not expected at this
time.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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.
$$
GMZ031-282130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast to east winds near 10 knots, becoming northeast
near 5 knots. Bay waters a light chop, becoming smooth.
.TONIGHT...Northeast winds near 5 knots, becoming north to
northeast after midnight. Bay waters smooth.
.MONDAY...Variable winds near 5 knots. Bay waters smooth.
.MONDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest near 10 knots. Bay waters smooth to a light chop,
becoming a light chop.
.TUESDAY...Northwest to north winds 5 to 10 knots, becoming
northwest near 15 knots late. Bay waters smooth to a light chop,
becoming a moderate chop. Isolated showers.
.TUESDAY NIGHT...Northwest to north winds increasing to 15 to 20
knots. Bay waters becoming choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, becoming northwest to
north near 10 knots in the afternoon. Bay waters choppy, becoming
a light chop.
.WEDNESDAY NIGHT...Northwest to north winds 10 to 15 knots. Bay
waters a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...Northwest to north winds 10 to 15
knots. Bay waters a light to moderate chop.
$$
GMZ032-035-282130-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
421 AM EST Sun Dec 28 2025
.TODAY...North to northeast winds near 10 knots, becoming
northeast to east near 5 knots. Seas 1 foot or less. Nearshore
waters a light chop, becoming smooth.
.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.MONDAY...North to northeast winds near 5 knots, becoming
northwest to north. Seas 1 foot or less. Nearshore waters smooth.
.MONDAY NIGHT...Northwest winds near 5 knots, increasing to 5 to
10 knots. Seas 1 foot or less, then 1 foot or less after midnight.
Nearshore waters smooth, becoming smooth to a light chop.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots in the afternoon. Seas 1 foot or less, building to
2 to 3 feet. Nearshore waters a light to moderate chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Isolated
showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, subsiding to 2 to 3 feet. Nearshore
waters choppy, becoming a light to moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas subsiding to 1
to 2 feet, except subsiding to 2 to 3 feet west of the Marquesas
Keys. Nearshore waters a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters a light to moderate chop.
$$
GMZ042>044-282130-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
421 AM EST Sun Dec 28 2025
.TODAY...North winds near 10 knots, becoming northeast to east 5
to 10 knots. Seas 1 foot or less. Nearshore waters a light chop,
becoming smooth to a light chop.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop.
.MONDAY...North to northeast winds near 5 knots, becoming
variable. Seas around 1 foot. Nearshore waters smooth.
.MONDAY NIGHT...Northwest winds increasing to 5 to 10 knots. Seas
around 1 foot. Nearshore waters becoming smooth to a light chop.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots late. Seas around 1 foot. West of Cosgrove Shoal
Light, seas 1 foot, building to 2 to 3 feet. Nearshore waters a
light to moderate chop, becoming a moderate chop. Isolated
showers.
.TUESDAY NIGHT...Northwest to north winds increasing to 15 to 20
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters becoming
choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters a light to
moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters
a light to moderate chop.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters a light to moderate chop.
$$
GMZ052>055-072>075-282130-
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-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet.
Wave Detail: Northeast to east 2 feet at 4 seconds.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 to 2
feet. Wave Detail: East 2 feet at 4 seconds.
.MONDAY...Northeast to east winds near 5 knots, becoming
variable. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4 seconds.
.MONDAY NIGHT...Winds becoming northwest to north 5 to 10 knots.
Seas around 1 foot.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing to
near 15 knots late. Seas building to 2 to 4 feet. Isolated
showers.
.TUESDAY NIGHT...Northwest to north winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to
4 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas subsiding to 2
to 3 feet. Isolated showers.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 2
to 3 feet.
$$
GMZ033-034-282130-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
421 AM EST Sun Dec 28 2025
.TODAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 2 seconds.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: East 1 foot at 3 seconds.
.MONDAY...North to northeast winds near 5 knots, becoming
northwest to north. Seas 1 foot or less.
.MONDAY NIGHT...Northwest to north winds 5 to 10 knots, increasing
to near 10 knots late. Seas 1 foot or less.
.TUESDAY...Northwest to north winds 10 to 15 knots, increasing
to 15 to 20 knots in the afternoon. Seas 1 to 2 feet, building to
3 to 5 feet. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, subsiding to 3 to 4 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY AND THURSDAY NIGHT...North winds 10 to 15 knots. Seas 2
to 3 feet.
$$