947
FZUS52 KKEY 211520
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1020 AM EST Fri Nov 21 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.

GMZ005-220330-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1020 AM EST Fri Nov 21 2025

.SYNOPSIS...High pressure spanning the Atlantic Coast and Florida
will maintain gentle to moderate breezes, tending stronger over
the Florida Straits. This high will weaken as it pivots out into
the Atlantic tonight. This will result in slackening breezes
heading into the weekend. Breezes are expected to freshen
modestly early next week as a continental high driving into the
eastern United States reinforces the old ridge.

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.

$$

GMZ031-220330-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1020 AM EST Fri Nov 21 2025

.THIS AFTERNOON...Northeast to east winds 5 to 10 knots. Bay
waters smooth to a light chop.
.TONIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop.
.SATURDAY AND SATURDAY NIGHT...Northeast to east winds 5 to 10
knots. Bay waters smooth to a light chop.
.SUNDAY...North winds near 10 knots, becoming northeast 5 to 10
knots. Bay waters a light chop, becoming smooth to a light chop.
.SUNDAY NIGHT...Northeast 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...East winds 10 to 15 knots. Bay waters a light to
moderate chop.
.TUESDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.TUESDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.

$$

GMZ032-035-220330-
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-
1020 AM EST Fri Nov 21 2025

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

$$

GMZ042>044-220330-
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-
1020 AM EST Fri Nov 21 2025

.THIS AFTERNOON...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
.TONIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to
3 feet. Nearshore waters a light to moderate chop.
.SATURDAY...Northeast winds decreasing to 5 to 10 knots. Seas
subsiding to 1 to 2 feet. Nearshore waters becoming smooth to a
light chop.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas subsiding to
around 1 foot. Nearshore waters smooth to a light chop.
.SUNDAY...North to northeast winds near 10 knots, becoming
northeast. Seas around 1 foot. Nearshore waters a light chop.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop.
.MONDAY...Northeast to east winds increasing to 10 to 15 knots.
Seas building to 1 to 2 feet. Nearshore waters becoming a light
to moderate chop.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore
waters a light to moderate chop. Isolated showers.
.TUESDAY NIGHT...East winds near 15 knots. Seas 2 to 3. Nearshore
waters a moderate chop. Isolated showers.

$$

GMZ052>055-072>075-220330-
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-
1020 AM EST Fri Nov 21 2025

.THIS AFTERNOON...East winds 10 to 15 knots, increasing to near
15 knots late. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5
seconds.
.TONIGHT...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.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: Northeast to east 3 feet at 5 seconds.
.SATURDAY NIGHT...Northeast winds decreasing to near 10 knots.
Seas subsiding to 1 to 2 feet.
.SUNDAY...Northeast winds 10 to 15 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 2 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 2 to
4 feet, occasionally to 5 feet.
.TUESDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.

$$

GMZ033-034-220330-
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-
1020 AM EST Fri Nov 21 2025

.THIS AFTERNOON...Northeast to east winds near 10 knots early,
decreasing to 5 to 10 knots. Seas 1 to 2 feet. Wave Detail:
Northeast to east 2 feet at 3 seconds.
.TONIGHT...Northeast to east winds increasing to 10 to 15 knots.
Seas 1 to 2 feet. Wave Detail: East 2 feet at 3 seconds.
.SATURDAY...Northeast winds decreasing to 5 to 10 knots. Seas
subsiding to 1 to 2 feet. Wave Detail: Northeast to east 2 feet
at 3 seconds.
.SATURDAY NIGHT...North to northeast winds 5 to 10 knots. Seas
subsiding to around 1 foot.
.SUNDAY...North to northeast winds near 10 knots, decreasing to 5
to 10 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT...North to northeast winds 5 to 10 knots. Seas
around 1 foot.
.MONDAY AND MONDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2
feet.
.TUESDAY AND TUESDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Isolated showers.

$$