863
FZUS52 KKEY 242117
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 PM EST Mon Nov 24 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.

GMZ005-250930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 PM EST Mon Nov 24 2025

.SYNOPSIS...A continental high will gradually push offshore over
the next couple of days, resulting in freshening northeast to
east breezes. As the center of this high progresses eastward into
the western North Atlantic, breezes will collapse by midweek, as
the pressure field becomes nebulous. Probability is increasing
that a cold front will push southward through the Florida Keys
coastal waters later this week before stalling, resulting in what
appears to be the start of a prolonged period of freshened
northeast to easterly breezes through the weekend.

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.

$$

GMZ031-250930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 PM EST Mon Nov 24 2025

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

$$

GMZ032-035-250930-
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-
417 PM EST Mon Nov 24 2025

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

$$

GMZ042>044-250930-
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-
417 PM EST Mon Nov 24 2025

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

$$

GMZ052>055-072>075-250930-
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-
417 PM EST Mon Nov 24 2025

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

$$

GMZ033-034-250930-
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-
417 PM EST Mon Nov 24 2025

.TONIGHT...Northeast to east winds near 10 knots, becoming east
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 2
to 3 feet. Wave Detail: East to southeast 3 feet at 4 seconds.
.TUESDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: East 2 feet at 4 seconds. Isolated showers.
.TUESDAY NIGHT...East 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.
.WEDNESDAY AND WEDNESDAY NIGHT...Northeast to east winds 5 to 10
knots. Seas 1 to 2 feet. Isolated showers.
.THURSDAY...North to northeast winds 5 to 10 knots, increasing to 10
to 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Isolated
showers.
.THURSDAY NIGHT...North to northeast winds increasing to 15 to 20
knots. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to
6 feet. Isolated showers.
.FRIDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.FRIDAY NIGHT...Northeast winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.SATURDAY AND SATURDAY NIGHT...Northeast to east winds near 20
knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.

$$

BT/DP