000
FZUS52 KKEY 090930
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 AM EST Tue Dec 9 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.

GMZ005-092130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 AM EST Tue Dec 9 2025

.SYNOPSIS...Freshening north to northeast breezes are expected
today as a result of a frontal boundary that moved across the
Florida Keys overnight. The front will continue to linger across
the distant Straits of Florida through the afternoon therefore
higher shower coverage is expected in those waters. As the front
departs our waters, breezes will then fluctuate between gentle and
moderate during the week.

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

21 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
22 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
 8 NM Southeast of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 3 NM Southeast of Molasses Reef Light...off Key Largo.
 1 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.

$$

GMZ031-092130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
430 AM EST Tue Dec 9 2025

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

$$

GMZ032-035-092130-
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-
430 AM EST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a
moderate chop. Scattered showers.
.TONIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Scattered showers.
.WEDNESDAY...North winds near 10 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming
smooth to a light chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY...North winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.THURSDAY NIGHT...North to northeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to 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...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Scattered showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1
to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. Scattered showers.

$$

GMZ042>044-092130-
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-
430 AM EST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters choppy,
becoming a moderate chop. Numerous showers.
.TONIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Scattered showers.
.WEDNESDAY...North winds near 10 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth
to a light chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.THURSDAY...North winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.THURSDAY NIGHT...North to northeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to 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...East winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Scattered showers.
.SATURDAY NIGHT...Northeast to east winds near 15 knots. Seas 2
to 3 feet. Nearshore waters a moderate chop. Scattered showers.


$$

GMZ052>055-072>075-092130-
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-
430 AM EST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

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

$$

GMZ033-034-092130-
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-
430 AM EST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

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

$$