553
FZUS52 KKEY 101539
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1039 AM EST Mon Nov 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.

GMZ005-110345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1039 AM EST Mon Nov 10 2025

.SYNOPSIS...A potent cold front will continue push through the
Florida Keys marine zones this afternoon, bringing fresh to
strong northerly breezes in its wake, peaking overnight. As the
next high builds in behind the front, winds will shift out of the
northeast and gradually slacken. Moderate to occasionally fresh
breezes will remain possible through the end of the work week.

The Approximate Shoreward Edge of the Gulf Stream as of November
4...

42 NM South of Dry Tortugas Light...on Loggerhead Key.
42 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
30 NM South of Sand Key Light...off Key West.
29 NM South of Looe Key...off Big Pine Key.
27 NM Southeast of Sombrero Key Light...off Marathon.
14 NM Southeast of Alligator Reef Light...off Islamorada.
 4 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.

$$

GMZ031-110345-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1039 AM EST Mon Nov 10 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northwest winds 10 to 15 knots, becoming
northwest and increasing to 20 to 25 knots. Bay waters a light to
moderate chop, becoming very rough.
.TONIGHT...Northwest to north winds 25 to 30 knots. Bay waters
extremely rough.
.TUESDAY...North to northeast winds near 25 knots, decreasing to
20 to 25 knots. Bay waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to 15
to 20 knots. Bay waters very rough, becoming choppy.
.WEDNESDAY...Northeast winds near 15 knots. Bay waters a moderate
chop.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop.
.THURSDAY THROUGH FRIDAY...Northeast winds near 15 knots. Bay
waters a moderate chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.

$$

GMZ032-035-110345-
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-
1039 AM EST Mon Nov 10 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northwest to north winds near 20 knots,
increasing to 25 to 30 knots. Seas 1 to 2 feet, building to 3 to
5 feet, occasionally to 6 feet this afternoon. West of the
Marquesas Keys, seas 2 to 3 feet, building to 5 to 8 feet,
occasionally to 10 feet. Nearshore waters choppy, becoming
extremely rough.
.TONIGHT...North winds near 30 knots. Seas 4 to 6 feet,
occasionally to 8 feet, except 8 to 10 feet, occasionally to 13
feet west of the Marquesas Keys. Nearshore waters extremely rough.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except
6 to 9 feet, occasionally to 11 feet west of the Marquesas Keys.
Nearshore waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5
to 6 feet, occasionally to 8 feet west of the Marquesas Keys.
Nearshore waters very rough, becoming choppy.
.WEDNESDAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, except 3 to 5 feet, occasionally to
6 feet west of the Marquesas Keys. Nearshore waters choppy.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Seas 2 to
3 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters a moderate chop.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.THURSDAY NIGHT...Northeast winds near 15 knots. Seas around 2
feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop.
.FRIDAY...Northeast to east winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop.

$$

GMZ042>044-110345-
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-
1039 AM EST Mon Nov 10 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northwest winds 15 to 20 knots, becoming
northwest to north and increasing to 25 to 30 knots. Seas building
to 3 to 5 feet. West of Cosgrove Shoal Light, building to 5 to 7
feet, occasionally to 9 feet. Nearshore waters choppy, becoming
extremely rough.
.TONIGHT...North winds 25 to 30 knots. Seas 2 to 3 feet, except
6 to 9 feet, occasionally to 11 feet west of Cosgrove Shoal
Light. Nearshore waters extremely rough.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, except
5 to 8 feet, occasionally to 10 feet west of Cosgrove Shoal Light.
Nearshore waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 4
to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light.
Nearshore waters very rough, becoming choppy.
.WEDNESDAY...Northeast winds 15 to 20 knots. Seas 2 to 3 feet,
except 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal
Light. Nearshore waters choppy.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.THURSDAY NIGHT...Northeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop.
.FRIDAY AND FRIDAY NIGHT...Northeast to east winds near 15 knots.
Seas 2 to 3 feet. Nearshore waters a moderate chop.

$$

GMZ052>055-072>075-110345-
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-
1039 AM EST Mon Nov 10 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northwest winds 10 to 15 knots, becoming
northwest to north and increasing to 25 to 30 knots. Seas building
to 4 to 6 feet, occasionally to 8 feet this afternoon. Wave
Detail: Northwest 1 foot at 3 seconds, becoming northwest to north
6 feet at 5 seconds and northwest 1 foot at 2 seconds.
.TONIGHT...Northwest to north winds near 30 knots. Seas 5 to 8
feet, occasionally to 10 feet, building to 7 to 10 feet,
occasionally to 13 feet after midnight. Wave Detail: Northwest to
north 8 feet at 7 seconds, becoming north 8 feet at 7 seconds.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave
Detail: North to northeast 9 feet at 7 seconds and west to
northwest 7 feet at 9 seconds.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, becoming
northeast to east and decreasing to near 20 knots. Seas 6 to 9
feet, occasionally to 11 feet. Isolated showers.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 5 to
7 feet, occasionally to 9 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Isolated showers.
.FRIDAY AND FRIDAY NIGHT...Northeast to east winds 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers.

$$

GMZ033-034-110345-
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-
1039 AM EST Mon Nov 10 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northwest to north winds 20 to 25 knots,
increasing to near 30 knots. Seas building to 6 to 9 feet,
occasionally to 11 feet. Wave Detail: Northwest 5 feet at 4
seconds, becoming northwest to north 9 feet at 7 seconds.
.TONIGHT...North winds near 30 knots. Seas 7 to 10 feet,
occasionally to 13 feet. Wave Detail: Northwest to north 10 feet
at 8 seconds.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
20 to 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave
Detail: North 8 feet at 7 seconds.
.TUESDAY NIGHT...Northeast winds near 20 knots, decreasing to 15
to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Seas 2 to 3
feet.
.THURSDAY AND THURSDAY NIGHT...Northeast winds near 15 knots.
Seas 2 to 3 feet.
.FRIDAY AND FRIDAY NIGHT...Northeast to east winds near 15 knots.
Seas 2 to 3 feet.

$$