770
FZUS52 KKEY 011517
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1017 AM EST Mon Dec 1 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.

GMZ005-020330-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1017 AM EST Mon Dec 1 2025

.SYNOPSIS...Another large area of high pressure currently located
over the Lower Great Lakes region will continue moving eastward
through the afternoon. This will continue to promote gentle to
moderate northeast to east breezes shifting to southeasterly by
Tuesday morning as the high shifts farther east. A developing
storm system on the heels of this high will result in a weakening
of the pressure gradient across the Keys through early Wednesday.
Breezes will also clock around the compass going from southeast to
south Tuesday to northwest to north by early Wednesday. Its
corresponding cold front is expected to press through the Keys mid
to late week resulting in freshening north to northeast breezes.

The Approximate Shoreward Edge of the Gulf Stream as of November
28...

28 NM South of Dry Tortugas Light...on Loggerhead Key.
20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
17 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
 9 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.

$$

GMZ031-020330-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1017 AM EST Mon Dec 1 2025

.THIS AFTERNOON...Northeast to east winds near 10 knots. Bay
waters a light chop.
.TONIGHT...East winds near 10 knots, becoming southeast. Bay
waters a light chop.
.TUESDAY...Southeast to south winds near 10 knots, becoming
southwest in the afternoon. Bay waters a light chop.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, decreasing
to near 5 knots. Bay waters smooth to a light chop, becoming
smooth.
.WEDNESDAY...Northwest winds near 5 knots. Bay waters smooth.
.WEDNESDAY NIGHT...Northwest to north winds near 5 knots, becoming
north to northeast. Bay waters smooth.
.THURSDAY...North to northeast winds 5 to 10 knots, becoming
northeast to east and increasing to 10 to 15 knots. Bay waters
smooth to a light chop, becoming a light to moderate chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.FRIDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop.

$$

GMZ032-035-020330-
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-
1017 AM EST Mon Dec 1 2025

.THIS AFTERNOON...Northeast to east winds near 10 knots, becoming
east. Seas around 1 foot. Nearshore waters a light chop.
.TONIGHT...East to southeast winds increasing to 10 to 15 knots.
Seas around 1 foot. Nearshore waters becoming a light to moderate
chop.
.TUESDAY...Southeast to south winds near 10 knots, becoming
southwest to west and decreasing to 5 to 10 knots in the
afternoon. Seas around 1 foot, except subsiding to 1 to 2 feet
west of the Marquesas Keys. Nearshore waters a light chop,
becoming smooth to a light chop.
.TUESDAY NIGHT...West to northwest winds near 5 knots, becoming
northwest to north. Seas around 1 foot. Nearshore waters smooth.
.WEDNESDAY...North winds 5 to 10 knots. Seas around 1 foot, except
building to around 2 feet west of the Marquesas Keys. Nearshore
waters smooth to a light chop.
.WEDNESDAY NIGHT...North winds 5 to 10 knots, becoming north to
northeast and increasing to near 10 knots. Seas 1 to 2 feet,
except building to 2 to 3 feet west of the Marquesas Keys.
Nearshore waters smooth to a light chop, becoming a light chop.
.THURSDAY...Northeast to east winds near 10 knots, increasing to
10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the
Marquesas Keys. Nearshore waters a light chop, becoming a light to
moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 1
to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a moderate chop.
.FRIDAY...East to southeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the
Marquesas Keys. Nearshore waters a moderate chop, becoming a light
to moderate chop.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 1 foot, except around 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop.

$$

GMZ042>044-020330-
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-
1017 AM EST Mon Dec 1 2025

.THIS AFTERNOON...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.
.TONIGHT...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY...Southeast to south winds 10 to 15 knots, becoming
southwest to west and decreasing to 5 to 10 knots in the
afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore
waters a light to moderate chop, becoming smooth to a light chop.
Isolated showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest to north. Seas around 1 foot. Nearshore waters smooth
to a light chop.
.WEDNESDAY...North winds 5 to 10 knots. Seas around 1 foot, except
building to 1 to 2 feet west of Cosgrove Shoal Light. Nearshore
waters smooth to a light chop.
.WEDNESDAY NIGHT...North to northeast winds 5 to 10 knots,
increasing to near 10 knots. Seas around 1 foot, except around 2
feet west of Cosgrove Shoal Light. Nearshore waters smooth to a
light chop, becoming a light chop.
.THURSDAY...Northeast winds 10 to 15 knots, becoming northeast to
east. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal
Light. Nearshore waters a light to moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas
2 to 3 feet. Nearshore waters a moderate chop.
.FRIDAY AND FRIDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Nearshore waters a light to moderate
chop.

$$

GMZ052>055-072>075-020330-
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-
1017 AM EST Mon Dec 1 2025

.THIS AFTERNOON...East winds near 15 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 5 seconds. Isolated showers.
.TONIGHT...East to southeast winds near 15 knots. Seas 2 to 4
feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5
seconds. Isolated showers.
.TUESDAY...Southeast to south winds 10 to 15 knots, becoming
southwest to west and decreasing to 5 to 10 knots in the
afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail: Southeast 3 feet at 5 seconds. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest to north. Seas 1 to 2 feet.
.WEDNESDAY...North to northeast winds 5 to 10 knots. Seas 1 to 2
feet, except building to 2 to 3 feet west of Halfmoon Shoal Light
due to north to northeast swell.
.WEDNESDAY NIGHT...North to northeast winds 5 to 10 knots,
increasing to near 10 knots. Seas 1 to 3 feet, except 2 to 3 feet
west of Halfmoon Shoal Light due to north to northeast swell.
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
4 feet, occasionally to 5 feet.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas
3 to 4 feet, occasionally to 5 feet.
.FRIDAY AND FRIDAY NIGHT...East to southeast winds near 15 knots.
Seas 3 to 4 feet, occasionally to 5 feet.

$$

GMZ033-034-020330-
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-
1017 AM EST Mon Dec 1 2025

.THIS AFTERNOON...Northeast to east winds 10 to 15 knots, becoming
east. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4 seconds.
Isolated showers.
.TONIGHT...East to southeast winds 10 to 15 knots, becoming
southeast to south. Seas 2 to 3 feet. Wave Detail:
East to southeast 2 feet at 3 seconds. Isolated showers.
.TUESDAY...Southeast to south winds 10 to 15 knots, becoming
southwest to west and decreasing to 5 to 10 knots in the
afternoon. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail: South to southwest 2 feet at 3 seconds. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest to north. Seas 1 to 2 feet.
.WEDNESDAY...North winds 5 to 10 knots, increasing to near 10
knots. Seas 1 to 2 feet, building to 2 to 3 feet.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
2 to 3 feet.
.THURSDAY...Northeast winds 10 to 15 knots, becoming northeast to
east and decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding
to around 2 feet.
.THURSDAY NIGHT...Northeast to east winds near 10 knots,
increasing to 10 to 15 knots. Seas around 2 feet.
.FRIDAY...East to southeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to
3 feet.

$$