890
FZUS52 KKEY 182133
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
433 PM EST Tue Nov 18 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.

GMZ005-190945-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
433 PM EST Tue Nov 18 2025

.SYNOPSIS...High pressure located over the eastern CONUS will
slowly move into the western Atlantic tonight. The high will then
slowly build and support freshening northeast to east breezes
during the work week. Although the high will wax and wane at
times, expect generally gentle to moderate breezes with
occasional moderate to fresh breezes south of the island chain.


The Approximate Shoreward Edge of the Gulf Stream as of November 14...

54 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
19 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
 4 NM Southeast of Alligator Reef Light...off Islamorada.
 1 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.

$$

GMZ031-190945-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
433 PM EST Tue Nov 18 2025

.TONIGHT...Northeast to east winds near 10 knots, increasing to
10 to 15 knots. Bay waters a light chop, becoming a light to
moderate chop.
.WEDNESDAY...Northeast to east winds decreasing to near 10 knots.
Bay waters becoming a light chop.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.THURSDAY...Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.FRIDAY...Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.SATURDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Bay
waters a light chop.
.SUNDAY...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop.

$$

GMZ032-035-190945-
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-
433 PM EST Tue Nov 18 2025

.TONIGHT...Northeast to east winds 10 to 15 knots, increasing to
near 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,
becoming a moderate chop. Isolated showers.
.WEDNESDAY...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.
.WEDNESDAY 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.
.THURSDAY...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.
.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.
.FRIDAY...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.
.FRIDAY 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.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop.
.SATURDAY NIGHT...Northeast to east winds decreasing to near 10
knots. Seas subsiding to around 1 foot. West of the Marquesas
Keys, seas 1 to 2 feet. Nearshore waters becoming a light chop.
.SUNDAY...Northeast to east winds decreasing to 5 to 10 knots.
Seas 1 foot or less, except 1 to 2 feet west of the Marquesas
Keys. Nearshore waters becoming smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds increasing to near 10
knots. Seas building to around 1 foot, except 1 to 2 feet west of
the Marquesas Keys. Nearshore waters becoming a light chop.

$$

GMZ042>044-190945-
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-
433 PM EST Tue Nov 18 2025

.TONIGHT...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet west of
Cosgrove Shoal Light. Nearshore waters a light to moderate chop,
becoming a moderate chop. Isolated showers.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Nearshore waters a light to moderate chop.
.THURSDAY...Northeast to east winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas
2 to 3 feet. Nearshore waters a moderate chop.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
.SUNDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SUNDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop.

$$

GMZ052>055-072>075-190945-
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-
433 PM EST Tue Nov 18 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...

.TONIGHT...Northeast to east winds near 15 knots, increasing to
15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6
feet. Wave Detail: East 5 feet at 5 seconds. Scattered showers.
.WEDNESDAY...Northeast to east winds near 15 knots. Seas subsiding
to 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet
at 5 seconds. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 3
to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east
4 feet at 5 seconds.
.THURSDAY...Northeast to east winds near 15 knots. Seas 3 to
4 feet, occasionally to 5 feet.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
.FRIDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated
showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SUNDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.SUNDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.

$$

GMZ033-034-190945-
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-
433 PM EST Tue Nov 18 2025

.TONIGHT...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 1 to 3 feet, building to 2 to 4 feet. Wave Detail: East 3
feet at 4 seconds. Isolated showers.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
4 feet, subsiding to 1 to 3 feet. Wave Detail: Northeast to east
3 feet at 4 seconds. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds.
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
.FRIDAY...East winds 10 to 15 knots. Seas 1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
.SATURDAY...Northeast to east winds 10 to 15 knots, decreasing to
near 10 knots. Seas subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Northeast to east winds increasing to 10 to 15
knots. Seas 1 to 2 feet.
.SUNDAY...Northeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 1 to 2 feet.
.SUNDAY NIGHT...Northeast to east winds increasing to 10 to 15
knots. Seas 1 to 2 feet.

$$