073
FZUS52 KKEY 292128
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
428 PM 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.

GMZ005-300930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 PM 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 tonight. As the front decays and
the high shifts northeastward, breezes will begin to slacken by
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.

$$

GMZ031-300930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
428 PM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northeast to east winds near 20 knots, decreasing to
15 to 20 knots after midnight. Bay waters rough, becoming choppy.
Scattered showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds near 15 knots. Bay waters 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 to northeast winds increasing to near 10
knots. Bay waters becoming a light chop.
.THURSDAY...Northeast winds near 10 knots. Bay waters a light
chop.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop.

$$

GMZ032-035-300930-
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-
428 PM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northeast to east winds 20 to 25 knots, becoming 15 to
20 knots late. 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 very rough, becoming choppy late. Scattered
showers and isolated thunderstorms.
.SUNDAY...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
3 feet, except 3 to 4 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 10 to 15 knots, becoming
south to southwest near 10 knots. Seas around 1 foot, except
subsiding to 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light to moderate chop, becoming a light chop. Isolated
showers.
.TUESDAY NIGHT...West to northwest winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop. Isolated showers.
.WEDNESDAY...North winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except building to 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop.
.THURSDAY...Northeast 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.
.THURSDAY 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.

$$

GMZ042>044-300930-
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-
428 PM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

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

$$

GMZ052>055-072>075-300930-
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-
428 PM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northeast to east winds near 25 knots, decreasing to 20
to 25 knots. Seas 8 to 10 feet, occasionally to 13 feet,
subsiding to 6 to 9 feet, occasionally to 11 feet after midnight.
Wave Detail: Northeast to east 9 feet at 8 seconds and west to
northwest 2 feet at 8 seconds, becoming northeast to east 9 feet
at 8 seconds and west to northwest 1 foot at 7 seconds. Numerous
showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds near 20 knots, decreasing to 15
to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding
to 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast to
east 6 feet at 8 seconds. Scattered showers.
.SUNDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Wave Detail: Northeast to east
5 feet at 7 seconds. Scattered showers.
.MONDAY...East winds near 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 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 near 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
building to 2 to 3 feet.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas
2 to 4 feet. Isolated showers.

$$

GMZ033-034-300930-
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-
428 PM EST Sat Nov 29 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.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 near 20 knots, decreasing to 10
to 15 knots in the afternoon. Seas 3 to 6 feet, occasionally to 7
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 increasing to 15 to 20
knots. Seas 2 to 4 feet. Wave Detail: Northeast to east 3 feet at
4 seconds. Isolated showers.
.MONDAY...Northeast to east winds near 15 knots, decreasing to 10
to 15 knots in the afternoon. Seas subsiding to 2 to 3 feet.
Isolated showers.
.MONDAY NIGHT...East to southeast winds near 15 knots, decreasing
to 10 to 15 knots. Seas 2 to 3 feet. Isolated showers.
.TUESDAY...Southeast to south winds 10 to 15 knots, becoming
southwest near 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2
feet. Isolated showers.
.TUESDAY NIGHT...West to northwest winds near 10 knots. Seas 1 to
2 feet. Isolated showers.
.WEDNESDAY...North winds 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.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet.

$$