836
FZUS52 KKEY 291527
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1027 AM EST Sat Nov 29 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.

GMZ005-300330-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1027 AM EST Sat Nov 29 2025

.SYNOPSIS...A frontal boundary south of the area, paired with a
dominant surface high over the eastern CONUS, will maintain fresh
to strong northeasterly breezes this afternoon, and Small Craft
Advisories will likely extend through tonight. As the front decays
and the high shifts northeastward, breezes will begin to slacken
by early Sunday. Another cold front may be on the horizon for the
middle of the week, reflected in the breezes turning around the
clock ahead of it. Shower activity will wax and wane throughout
the marine forecast period.

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.

$$

GMZ031-300330-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1027 AM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast to east winds near 15 knots early,
increasing to 20 to 25 knots. Bay waters a moderate chop,
becoming very rough. Scattered showers and isolated thunderstorms
developing.
.TONIGHT...Northeast to east winds 20 to 25 knots, decreasing to
near 20 knots after midnight. Bay waters very rough, becoming
rough. Scattered showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
Isolated showers.
.SUNDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
.MONDAY...Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming
southeast. Bay waters a light to moderate chop. Isolated showers.
.TUESDAY...Southeast to south winds near 10 knots, becoming south
to southwest. Bay waters a light chop. Isolated showers.
.TUESDAY NIGHT...Southwest to west winds 5 to 10 knots, becoming
northwest. Bay waters smooth to a light chop. Isolated showers.
.WEDNESDAY...Northwest to north winds 5 to 10 knots. Bay waters
smooth to a light chop.
.WEDNESDAY NIGHT...North winds 5 to 10 knots. Bay waters smooth
to a light chop.

$$

GMZ032-035-300330-
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-
1027 AM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast to east winds near 20 knots,
increasing to near 25 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 rough, becoming extremely rough.
Scattered showers and isolated thunderstorms developing.
.TONIGHT...Northeast to east winds near 25 knots, decreasing to
20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, except
4 to 6 feet, occasionally to 8 feet west of the Marquesas Keys.
Nearshore waters extremely rough, becoming very rough. Scattered
showers and isolated thunderstorms.
.SUNDAY...Northeast to east 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 the Marquesas Keys. Nearshore waters choppy,
becoming a moderate chop. Isolated showers.
.SUNDAY 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. Isolated showers.
.MONDAY...Northeast to east winds near 15 knots, becoming east.
Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a moderate chop. Isolated showers.
.MONDAY NIGHT...East winds near 15 knots, becoming east to
southeast and 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. Isolated
showers.
.TUESDAY...Southeast to south winds near 10 knots, becoming south
to southwest and decreasing to 5 to 10 knots. Seas 1 foot or
less, except 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light chop, becoming smooth to a light chop. Isolated
showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers.
.WEDNESDAY...North winds 5 to 10 knots. Seas around 1 foot,
except 1 to 2 feet west of the Marquesas Keys. Nearshore waters
smooth to a light chop.
.WEDNESDAY NIGHT...North winds near 10 knots. Seas around 1 foot,
except around 2 feet west of the Marquesas Keys. Nearshore waters
a light chop.

$$

GMZ042>044-300330-
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-
1027 AM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast to east winds 20 to 25 knots early,
increasing to near 25 knots. Seas 4 to 6 feet, occasionally to 8
feet, except 5 to 6 feet, occasionally to 8 feet west of Cosgrove
Shoal Light. Nearshore waters very rough, becoming extremely rough.
Scattered showers and isolated thunderstorms developing.
.TONIGHT...Northeast to east winds near 25 knots, decreasing to
near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet,
subsiding to 3 to 5 feet, occasionally to 6 feet. Nearshore waters
extremely rough, becoming rough. Scattered showers and isolated
thunderstorms.
.SUNDAY...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to 2 to 3 feet. Nearshore waters choppy, becoming a
moderate chop. Isolated showers.
.SUNDAY NIGHT...Northeast to east winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Isolated showers.
.MONDAY...Northeast to east winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Isolated showers.
.MONDAY NIGHT...East winds near 15 knots, becoming east to
southeast and decreasing to 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop, becoming a light to moderate
chop. Isolated showers.
.TUESDAY...Southeast to south winds near 10 knots, becoming south
to southwest and decreasing to 5 to 10 knots. Seas around 2 feet,
subsiding to 1 to 2 feet. Nearshore waters a light chop, becoming
smooth to a light chop. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers.
.WEDNESDAY...North winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.WEDNESDAY NIGHT...North to northeast winds near 10 knots. Seas
1 foot, except 2 to 3 feet west of Cosgrove Shoal Light.
Nearshore waters a light chop.

$$

GMZ052>055-072>075-300330-
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-
1027 AM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast to east winds near 25 knots. Seas 7
to 10 feet, occasionally to 13 feet. Wave Detail: Northeast to
east 9 feet at 7 seconds and west to northwest 2 feet at 8
seconds. Widespread showers and isolated thunderstorms developing.
.TONIGHT...Northeast to east winds near 25 knots, decreasing to
near 20 knots. Seas 8 to 10 feet, occasionally to 13 feet,
subsiding to 6 to 9 feet, occasionally to 11 feet. Wave Detail:
Northeast to east 10 feet at 8 seconds and west to northwest 1
foot at 7 seconds, becoming east 9 feet at 8 seconds. Numerous
showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 5 to 7 feet, occasionally to 9 feet,
subsiding to 3 to 5 feet, occasionally to 7 feet. Wave Detail:
East 6 feet at 8 seconds. Scattered showers.
.SUNDAY NIGHT...Northeast to east winds near 15 knots. Seas 3 to
5 feet, occasionally to 6 feet. Scattered showers.
.MONDAY...Northeast to east winds near 15 knots, becoming east.
Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers.
.MONDAY NIGHT...East winds near 15 knots, becoming east to
southeast and decreasing to 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY...Southeast to south winds 10 to 15 knots, becoming
south to southwest and decreasing to 5 to 10 knots. Seas 2 to 4
feet, occasionally to 5 feet, subsiding to around 2 feet. Isolated
showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest. Seas 1 to 2 feet. Isolated showers.
.WEDNESDAY...North winds near 10 knots. Seas 1 to 2 feet.
Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
1 to 3 feet.

$$

GMZ033-034-300330-
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-
1027 AM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast to east winds 20 to 25 knots,
increasing to near 25 knots late. Seas 5 to 7 feet, occasionally
to 9 feet. Wave Detail: North to northeast 6 feet at 7 seconds.
Scattered showers and isolated thunderstorms developing.
.TONIGHT...Northeast to east winds near 25 knots, decreasing to
20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave
Detail: Northeast to east 6 feet at 5 seconds and northwest to
north 1 foot at 6 seconds. Numerous showers and isolated
thunderstorms.
.SUNDAY...Northeast to east winds 15 to 20 knots, becoming east
and decreasing to 10 to 15 knots in the afternoon. Seas 3 to 5
feet, occasionally to 6 feet, subsiding to 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 5 feet at 5 seconds.
Isolated showers.
.SUNDAY NIGHT...Northeast to east winds 10 to 15 knots, increasing
to near 15 knots. Seas 2 to 3 feet. Isolated showers.
.MONDAY...Northeast to east winds near 15 knots, decreasing to 10
to 15 knots in the afternoon. Seas 2 to 3 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.TUESDAY...Southeast to south winds near 10 knots, becoming
southwest in the afternoon. Seas around 2 feet, subsiding to 1 to
2 feet. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
1 to 2 feet. Isolated showers.
.WEDNESDAY...North winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet, building to 2 to 3 feet. Isolated
showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
2 to 3 feet.

$$