039
FZUS52 KKEY 192130
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 PM EST Wed Nov 19 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.

GMZ005-200930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 PM EST Wed Nov 19 2025

.SYNOPSIS...A high pressure system stretching from the western
Atlantic to the Florida panhandle will sustain northeast to east
breezes across the Florida Keys coastal waters. Expect the high to
gradually weaken during the second half of the week, which will
allow gentle to moderate breezes to briefly slacken to light to
gentle by the weekend. Expect slightly fresher breezes south of
the island chain. Breezes will gradually freshen early next week
as the pressure gradient slowly tightens due to an approaching
surface low.

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.

$$

GMZ031-200930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
430 PM EST Wed Nov 19 2025

.TONIGHT...Northeast winds near 10 knots. Bay waters a light
chop.
.THURSDAY...Northeast to east winds increasing to 10 to 15 knots.
Bay waters becoming 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 near 10 knots. Bay waters
a light 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 decreasing to 5 to 10 knots.
Bay waters becoming smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop.
.MONDAY...Northeast to east winds near 10 knots. Bay waters
a light chop.
.MONDAY NIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop.

$$

GMZ032-035-200930-
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-
430 PM EST Wed Nov 19 2025

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

$$

GMZ042>044-200930-
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-
430 PM EST Wed Nov 19 2025

.TONIGHT...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 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Nearshore waters a light to 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 1 to
3 feet. Nearshore waters a light to moderate chop.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
3 feet. Nearshore waters a light to moderate chop.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop.
.SUNDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.SUNDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop.
.MONDAY...Northeast to east winds increasing to 10 to 15 knots
knots. Seas building to around 2 feet. Nearshore waters becoming
a light to moderate chop.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop.

$$

GMZ052>055-072>075-200930-
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-
430 PM EST Wed Nov 19 2025

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

$$

GMZ033-034-200930-
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-
430 PM EST Wed Nov 19 2025

.TONIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: East 2 feet at 3 seconds.
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Wave Detail: Northeast to east 2 feet at 3 seconds.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: East 2 feet at 3 seconds.
.FRIDAY...East winds 10 to 15 knots. Seas 2 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, briefly
decreasing to 5 to 10 knots in the afternoon. Seas 1 to 2 feet.
.SATURDAY NIGHT...Northeast to east winds increasing to near 10
knots. Seas 1 to 2 feet.
.SUNDAY...Northeast winds decreasing to 5 to 10 knots. Seas
subsiding to around 1 foot.
.SUNDAY NIGHT...Northeast winds increasing to near 10 knots. Seas
around 1 foot.
.MONDAY...Northeast to east winds near 10 knots. Seas building to
around 2 feet.
.MONDAY NIGHT...East winds increasing to 10 to 15 knots. Seas 2
to 3 feet.

$$