941
FZUS52 KKEY 180917
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 AM 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.

GMZ005-182130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EST Tue Nov 18 2025

.SYNOPSIS...High pressure located over the eastern CONUS will
slowly move into the western Atlantic today and tonight. The high
will slowly build and support freshening northeast to east
breezes during the work week. Moderate to fresh breezes are
possible south of the island chain. Late in the week, a low
pressure system traversing the southeastern CONUS may allow
breezes to slacken to light to gentle.

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.

$$

GMZ031-182130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 AM EST Tue Nov 18 2025

.TODAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.TONIGHT...Northeast to east winds near 10 knots. Bay waters a
light chop.
.WEDNESDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.WEDNESDAY NIGHT...Northeast to east winds near 10 knots. Bay
waters a light chop.
.THURSDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.FRIDAY...Northeast to east winds near 10 knots. Bay waters a
light chop.
.FRIDAY NIGHT AND SATURDAY...Northeast to east winds 5 to 10
knots. Bay waters smooth to a light chop.
.SATURDAY NIGHT...Northeast to east winds near 5 knots. Bay
waters smooth.

$$

GMZ032-035-182130-
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 AM EST Tue Nov 18 2025

.TODAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas around 1 foot, building to 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
.TONIGHT...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...Northeast to east winds 10 to 15 knots, briefly
decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters a
light to moderate chop, briefly becoming a light chop.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters a light to moderate chop.
.THURSDAY...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.
.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 decreasing to near 10 knots.
Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters becoming a light chop.
.FRIDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.SATURDAY...East winds 5 to 10 knots. Seas subsiding to 1 foot or
less. Nearshore waters smooth to a light chop.
.SATURDAY NIGHT...Northeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.

$$

GMZ042>044-182130-
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 AM EST Tue Nov 18 2025

.TODAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas 1 to 2 feet. Nearshore waters a light chop,
becoming a light to moderate chop.
.TONIGHT...Northeast to east winds 10 to 15 knots. Seas building
to 2 to 3 feet. Nearshore waters a light to 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.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots. Seas 2
to 3 feet. Nearshore waters a 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...East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore
waters a light to moderate chop.
.FRIDAY NIGHT...East winds near 10 knots. Seas around 2 feet.
Nearshore waters a light chop.
.SATURDAY...Northeast to east winds 5 to 10 knots. Seas 1 to 2
feet, subsiding to around 1 foot. Nearshore waters smooth to a
light chop. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop.

$$

GMZ052>055-072>075-182130-
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 AM EST Tue Nov 18 2025

.TODAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: Northeast to east 3 feet at 4 seconds.
.TONIGHT...East winds near 15 knots, briefly increasing to 15 to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast to east 4 feet at 5 seconds. Isolated showers.
.WEDNESDAY...Northeast to east winds near 15 knots. Seas 2 to 4
feet, occasionally to 5 feet. Wave Detail: Northeast to east 3
feet at 5 seconds. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 3
to 5 feet, occasionally to 6 feet.
.THURSDAY...Northeast to east winds 15 to 20 knots. Seas 3 to 5
feet, occasionally to 6 feet.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots,
decreasing to near 15 knots. Seas 4 to 5 feet, occasionally to 6
feet. Isolated showers.
.FRIDAY...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.SATURDAY...East winds near 10 knots. Seas 2 to 3 feet, subsiding
to around 2 feet. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
subsiding to 1 to 2 feet. Isolated showers.

$$

GMZ033-034-182130-
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 AM EST Tue Nov 18 2025

.TODAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas 1 to 2 feet. Wave Detail: Northeast to east 2
feet at 3 seconds and northwest 1 foot at 5 seconds.
.TONIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 3 seconds. Isolated showers.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: Northeast to east 2 feet at 3 seconds.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet.
.THURSDAY...Northeast to east 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.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
.SATURDAY...Northeast to east winds near 10 knots, decreasing to
5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot.
.SATURDAY NIGHT...Northeast to east winds near 5 knots. Seas 1
foot or less.

$$

AJP