912
FZUS52 KKEY 250919
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
419 AM EST Tue Nov 25 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.

GMZ005-252130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 AM EST Tue Nov 25 2025

.SYNOPSIS...Ridging extended across the Florida peninsula will
continue to gradually pull away over the next couple of days. As
this happens, the pressure field across the area will weaken, and
our gentle to moderate easterly breezes will become light to
gentle by Wednesday morning. These conditions won`t last long as a
cold front associated with a progressive, deepening trough will
dig into the southeastern U.S. and send a cold front down the
Florida peninsula. Breezes will freshen drastically late Thursday
as the front approaches, and the end of the week will see a
period of fresh to strong breezes and an increase in shower
activity.

The Approximate Shoreward Edge of the Gulf Stream as of November
22...

35 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 6 NM South of Sand Key Light...off Key West.
 7 NM South of Looe Key...off Big Pine Key.
 8 NM Southeast of Sombrero Key Light...off Marathon.
 9 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.

$$

GMZ031-252130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
419 AM EST Tue Nov 25 2025

.TODAY...East to southeast winds 10 to 15 knots early, decreasing
to near 10 knots. Bay waters a light to moderate chop, becoming a
light chop. Isolated showers.
.TONIGHT...East winds near 10 knots. Bay waters a light chop.
Isolated showers.
.WEDNESDAY...East winds near 10 knots. Bay waters a light chop.
Isolated showers.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to
a light chop. Isolated showers.
.THURSDAY...North to northeast winds near 5 knots early,
increasing to near 10 knots. Bay waters smooth, becoming a light
chop. Scattered showers.
.THURSDAY NIGHT...North winds 10 to 15 knots, becoming north to
northeast and increasing to 15 to 20 knots. Bay waters a light to
moderate chop, becoming choppy. Scattered showers.
.FRIDAY...North to northeast winds near 20 knots. Bay waters
rough. Isolated showers.
.FRIDAY NIGHT...Northeast winds near 20 knots, decreasing to 15
to 20 knots. Bay waters rough, becoming choppy. Isolated showers.
.SATURDAY AND SATURDAY NIGHT...Northeast to east winds 15 to 20
knots. Bay waters choppy. Isolated showers.

$$

GMZ032-035-252130-
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-
419 AM EST Tue Nov 25 2025

.TODAY...East winds 10 to 15 knots, decreasing to near 10 knots.
Seas 1 to 2 feet, subsiding to around 1 foot. West of the
Marquesas Keys, seas 2 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
Isolated showers.
.TONIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop. Isolated
showers.
.THURSDAY...North to northeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas 1 foot or less, building to 1 to 2 feet.
Nearshore waters smooth to a light chop, becoming a light to
moderate chop. Isolated showers.
.THURSDAY NIGHT...North winds 15 to 20 knots, becoming north to
northeast and increasing to 20 to 25 knots late. Seas building to 2
to 4 feet, occasionally to 5 feet. West of the Marquesas Keys,
seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet,
occasionally to 8 feet. Nearshore waters choppy, becoming very
rough. Isolated showers.
.FRIDAY...North to northeast winds 20 to 25 knots, decreasing to
near 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5
to 7 feet, occasionally to 9 feet west of the Marquesas Keys.
Nearshore waters very rough, becoming rough. Isolated showers.
.FRIDAY NIGHT...Northeast winds near 20 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 rough, becoming choppy. Isolated showers.
.SATURDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except subsiding to 4 to 6 feet,
occasionally to 8 feet west of the Marquesas Keys. Nearshore
waters choppy. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet, except 4 to 5 feet,
occasionally to 6 feet west of the Marquesas Keys. Nearshore
waters choppy. Isolated showers.

$$

GMZ042>044-252130-
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-
419 AM EST Tue Nov 25 2025

.TODAY...East to southeast winds near 15 knots early, decreasing
to 10 to 15 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters a moderate chop, becoming a light to moderate
chop. Isolated showers.
.TONIGHT...East winds 10 to 15 knots, decreasing to near 10 knots.
Seas 1 to 2 feet. Nearshore waters a light to moderate chop.
Isolated showers.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. Isolated showers.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. Scattered showers.
.THURSDAY...Northeast winds 5 to 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet, except building to around 2 feet west of
Cosgrove Shoal Light. Nearshore waters smooth to a light chop.
Scattered showers.
.THURSDAY NIGHT...North winds 15 to 20 knots, becoming north to
northeast and increasing to 20 to 25 knots. Seas 1 to 2 feet.
West of Cosgrove Shoal Light, seas 2 to 3 feet, building to 3 to 5
feet, occasionally to 6 feet. Nearshore waters choppy, becoming
very rough. Scattered showers.
.FRIDAY...North to northeast winds 20 to 25 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. Isolated showers.
.FRIDAY NIGHT...Northeast winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, except 5 to 6 feet, occasionally to
8 feet west of Cosgrove Shoal Light. Nearshore waters rough.
Isolated showers.
.SATURDAY...Northeast to east winds near 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of Cosgrove Shoal Light. Nearshore waters rough.
Isolated showers.
.SATURDAY NIGHT...Northeast to east winds near 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Nearshore waters rough.
Isolated showers.

$$

GMZ052>055-072>075-252130-
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-
419 AM EST Tue Nov 25 2025

.TODAY...East to southeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 4 feet at 5 seconds. Isolated showers.
.TONIGHT...East winds 10 to 15 knots, decreasing to near 10 knots.
Seas 2 to 3 feet, subsiding to around 2 feet. Wave Detail: East 3
feet at 5 seconds. Isolated showers.
.WEDNESDAY...East winds near 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds. Isolated showers.
.WEDNESDAY NIGHT...East winds decreasing to 5 to 10 knots. Seas
subsiding to 1 to 2 feet. Scattered showers.
.THURSDAY...Northeast winds 5 to 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet, building to 2 to 3 feet. Scattered
showers.
.THURSDAY NIGHT...North to northeast winds 15 to 20 knots,
increasing to 20 to 25 knots. Seas building to 3 to 5 feet,
occasionally to 6 feet. Scattered showers.
.FRIDAY...North to northeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Scattered showers.
.FRIDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to near
20 knots. Seas 6 to 9 feet, occasionally to 11 feet. Scattered
showers.
.SATURDAY...Northeast to east winds near 20 knots. Seas subsiding
to 6 to 7 feet, occasionally to 9 feet. Scattered showers.
.SATURDAY NIGHT...East winds near 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Scattered showers.

$$

GMZ033-034-252130-
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-
419 AM EST Tue Nov 25 2025

.TODAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail: East 2 feet at 4 seconds. Isolated showers.
.TONIGHT...East winds near 10 knots. Seas 1 to 2 feet. Wave
Detail: East 2 feet at 3 seconds. Isolated showers.
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Wave Detail: East 2 feet at 3 seconds. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less. Isolated showers.
.THURSDAY...North to northeast winds near 10 knots, increasing to
near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Isolated
showers.
.THURSDAY NIGHT...North winds 15 to 20 knots, becoming north to
northeast and increasing to 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9
feet after midnight. Isolated showers.
.FRIDAY...North to northeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Isolated showers.
.FRIDAY NIGHT...Northeast winds decreasing to near 20 knots. Seas
5 to 7 feet, occasionally to 9 feet. Isolated showers.
.SATURDAY...Northeast to east winds decreasing to 15 to 20 knots.
Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet.
Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.

$$

DP