647
FZUS52 KKEY 100929
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
429 AM EST Wed Dec 10 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.

GMZ005-102130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EST Wed Dec 10 2025

.SYNOPSIS...As a frontal boundary slides eastward and away from
the Florida Keys marine zones during the early morning, breezes
will slacken. A second weak front will push through the coastal
waters late Wednesday and Wednesday night, with modestly freshened
northwesterly breezes clocking around to the northeast to east
for late week and into the weekend.

The Approximate Shoreward Edge of the Gulf Stream as of December 8...

15 NM South of Dry Tortugas Light...on Loggerhead Key.
13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
14 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
23 NM Southeast of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
12 NM Southeast of Molasses Reef Light...off Key Largo.
 8 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.

$$

GMZ031-102130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
429 AM EST Wed Dec 10 2025

.TODAY...North to northeast winds near 10 knots, becoming
northwest to north and decreasing to 5 to 10 knots. Bay waters a
light chop, becoming smooth to a light chop. Isolated showers.
.TONIGHT...Northwest winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers.
.THURSDAY...Northwest to north winds near 10 knots. Bay waters a
light chop.
.THURSDAY NIGHT...North to northeast winds near 10 knots. Bay
waters a light chop.
.FRIDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.FRIDAY NIGHT...East winds near 10 knots. Bay waters a light
chop.
.SATURDAY...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers.
.SUNDAY...Northeast winds near 10 knots. Bay waters a light chop.
Scattered showers.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.

$$

GMZ032-035-102130-
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-
429 AM EST Wed Dec 10 2025

.TODAY...North winds near 10 knots, becoming northwest to north
and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming smooth to a light chop. Isolated
showers.
.TONIGHT...Northwest to north winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY...North winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.
.THURSDAY NIGHT...North to northeast winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Scattered
showers.
.SUNDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers.
.SUNDAY NIGHT...North to northeast winds 10 to 15 knots,
becoming northeast and increasing to near 15 knots. Seas 2 to 3
feet. Nearshore waters a light to moderate chop, becoming a
moderate chop. Isolated showers.

$$

GMZ042>044-102130-
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-
429 AM EST Wed Dec 10 2025

.TODAY...North winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Isolated showers.
.TONIGHT...Northwest winds 5 to 10 knots, becoming northwest to
north and increasing to 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop, becoming a light to
moderate chop. Isolated showers.
.THURSDAY...North winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.
.THURSDAY NIGHT...North to northeast winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Scattered
showers.
.SUNDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers.
.SUNDAY NIGHT...North to northeast winds 10 to 15 knots,
increasing to near 15 knots. Seas building to 2 to 3 feet.
Nearshore waters a light to moderate chop, becoming a moderate
chop. Isolated showers.

$$

GMZ052>055-072>075-102130-
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-
429 AM EST Wed Dec 10 2025

.TODAY...North to northeast winds near 10 knots, becoming
northwest to north. Seas 2 to 3 feet. Wave Detail: Northeast to
east 2 feet at 6 seconds and northwest 2 feet at 7 seconds.
Isolated showers.
.TONIGHT...Northwest to north winds 5 to 10 knots, increasing to
near 10 knots. Seas around 2 feet. Wave Detail: North to
northeast 2 feet at 6 seconds. Isolated showers.
.THURSDAY...North winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: North to northeast 2 feet at 5 seconds.
.THURSDAY NIGHT...Northeast winds near 10 knots. Seas 2 to
3 feet.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Scattered showers.
.SATURDAY NIGHT...Northeast to east winds near 15 knots. Seas 2
to 4 feet, occasionally to 5 feet. Scattered showers.
.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Scattered showers.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6
feet after midnight. Scattered showers.

$$

GMZ033-034-102130-
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-
429 AM EST Wed Dec 10 2025

.TODAY...North winds near 10 knots. Seas 2 to 3 feet. Wave
Detail: North 2 feet at 5 seconds. Isolated showers.
.TONIGHT...Northwest to north winds near 10 knots. Seas around
2 feet. Wave Detail: Northwest 2 feet at 5 seconds.
.THURSDAY...North winds near 10 knots. Seas around 2 feet. Wave
Detail: Northwest to north 2 feet at 4 seconds.
.THURSDAY NIGHT...North to northeast winds near 10 knots. Seas
2 to 3 feet.
.FRIDAY...Northeast to east winds near 10 knots. Seas 2 to
3 feet.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
Isolated showers.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet. Scattered showers.
.SUNDAY...North to northeast winds 10 to 15 knots. Seas 1 to
2 feet. Scattered showers.
.SUNDAY NIGHT...North to northeast winds 10 to 15 knots,
increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2 to
4 feet, occasionally to 5 feet. Isolated showers.

$$