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Tavernier, FL Coastal Forecast

FZUS52 KKEY 212130
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 PM EST Sun Dec 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
430 PM EST Sun Dec 21 2025

.SYNOPSIS...Cold continental air will reinforce a high pressure
cell over the western North Atlantic tonight, as a result,
freshening breezes are expected across all Florida Keys coastal
waters. Strong breezes will peak Monday afternoon and Monday
night, followed by several days of fresh northeast to east
breezes. Breezes will diminish Thursday night through Friday
night.

The Approximate Shoreward Edge of the Gulf Stream as of December 21...

24 NM South of Dry Tortugas Light...on Loggerhead Key.
14 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
14 NM South of Sand Key Light...off Key West.
16 NM South of Looe Key...off Big Pine Key.
17 NM Southeast of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
11 NM Southeast of Molasses Reef Light...off Key Largo.
6 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 and RTOFS.

$$

GMZ031-220330-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
430 PM EST Sun Dec 21 2025

...SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED MONDAY...

.TONIGHT...Northeast winds 5 to 10 knots, increasing to near 15
knots. Bay waters smooth to a light chop, becoming a moderate
chop.
.MONDAY...Northeast winds 15 to 20 knots, becoming northeast to
east and increasing to 20 to 25 knots in the afternoon. Bay
waters choppy, becoming very rough.
.MONDAY NIGHT...Northeast to east winds 20 to 25 knots. Bay
waters very rough. Isolated showers.
.TUESDAY...Northeast to east winds near 20 knots. Bay waters
rough. Isolated showers.
.TUESDAY NIGHT AND WEDNESDAY...Northeast to east winds 15 to 20
knots. Bay waters choppy.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy.
.THURSDAY...Northeast to east winds near 15 knots. Bay waters a
moderate chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
.FRIDAY...Northeast to east winds near 10 knots. Bay waters a
light chop. Isolated showers.
.FRIDAY NIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop.

$$

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-
430 PM EST Sun Dec 21 2025

...SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED MONDAY...

.TONIGHT...Northeast winds 5 to 10 knots, increasing to near 15
knots. Seas around 1 foot, building to 1 to 2 feet. West of the
Marquesas Keys, seas building to 2 to 3 feet. Nearshore waters
smooth to a light chop, becoming a moderate chop.
.MONDAY...Northeast to east winds 15 to 20 knots, increasing to
20 to 25 knots. Seas 2 to 3 feet, except building to 3 to 4 feet,
occasionally to 5 feet west of the Marquesas Keys. Nearshore
waters choppy, becoming very rough.
.MONDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of the Marquesas Keys. Nearshore waters very
rough.
.TUESDAY...Northeast to east winds near 20 knots. Seas 2 to 3
feet, except 4 to 5 feet, occasionally to 6 feet west of the
Marquesas Keys. Nearshore waters rough. Isolated showers.
.TUESDAY NIGHT AND WEDNESDAY...Northeast to east winds 15 to 20
knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5
feet west of the Marquesas Keys. Nearshore waters choppy.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2
to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters choppy.
.THURSDAY...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally
to 5 feet west of the Marquesas Keys. Nearshore waters choppy,
becoming 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. Isolated showers.
.FRIDAY...Northeast to east winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.FRIDAY NIGHT...Northeast to east winds near 10 knots. Seas 1
foot or less. Nearshore waters a light chop.

$$

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-
430 PM EST Sun Dec 21 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
...SMALL CRAFT ADVISORY CONDITIONS EXPECTED MONDAY...

.TONIGHT...Northeast winds near 10 knots, increasing to 15 to 20
knots late. Seas 1 to 2 feet, building to 2 to 3 feet. Nearshore
waters a light chop, becoming choppy.
.MONDAY...Northeast to east winds near 20 knots, increasing to 20
to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to
3 to 5 feet, occasionally to 6 feet. Nearshore rough, becoming
very rough. Isolated showers.
.MONDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 4 to
6 feet, occasionally to 7 feet. Nearshore waters very rough.
Isolated showers.
.TUESDAY...Northeast to east winds near 20 knots. Seas 3 to 5
feet, occasionally to 6 feet. Nearshore waters rough. Isolated
showers.
.TUESDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 4
to 5 feet, occasionally to 7 feet. Nearshore waters very rough.
.WEDNESDAY...Northeast to east winds near 20 knots. Seas 3 to 5
feet, occasionally to 6 feet. Nearshore waters rough.
.WEDNESDAY NIGHT...Northeast to east winds near 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Nearshore waters rough.
.THURSDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Nearshore waters choppy.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 2
to 3 feet. Nearshore waters a moderate chop. Isolated showers.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Isolated showers.
.FRIDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop.

$$

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-
430 PM EST Sun Dec 21 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northeast winds near 15 knots, increasing to 15 to 20
knots after midnight, then increasing to near 20 knots late. Seas
3 to 5 feet, occasionally to 6 feet, building to 4 to 6 feet,
occasionally to 7 feet late. Wave Detail: Northeast to east 5
feet at 6 seconds and northwest 1 foot at 5 seconds. Isolated
showers.
.MONDAY...Northeast to east winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Wave Detail: Northeast to east
8 feet at 7 seconds. Isolated showers.
.MONDAY NIGHT...Northeast to east winds near 25 knots, decreasing
to 20 to 25 knots. Seas 8 to 10 feet, occasionally to 13 feet.
Wave Detail: Northeast to east 9 feet at 8 seconds. Isolated
showers.
.TUESDAY...Northeast to east winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Isolated showers.
.TUESDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas
6 to 8 feet, occasionally to 10 feet.
.WEDNESDAY...Northeast to east winds near 20 knots. Seas 5 to
7 feet, occasionally to 9 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas
5 to 8 feet, occasionally to 9 feet.
.THURSDAY...Northeast to east winds near 20 knots, decreasing to
15 to 20 knots. Seas 5 to 7 feet, occasionally to 8 feet.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 4
to 6 feet, occasionally to 7 feet, subsiding to 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.FRIDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
4 feet, occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 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-
430 PM EST Sun Dec 21 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
...SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED MONDAY...

.TONIGHT...North to northeast winds 5 to 10 knots, becoming northeast
and increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2
to 4 feet. Wave Detail: Northeast 2 feet at 3 seconds and
northwest 1 foot at 5 seconds.
.MONDAY...Northeast winds near 20 knots, briefly decreasing to 15
to 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6
feet. Wave Detail: Northeast 3 feet at 4 seconds. Isolated
showers.
.MONDAY NIGHT...Northeast to east winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Wave Detail: Northeast to east
4 feet at 4 seconds.
.TUESDAY...Northeast to east winds near 20 knots, briefly
decreasing to 15 to 20 knots in the afternoon. Seas 3 to
5 feet, occasionally to 6 feet. Isolated showers.
.TUESDAY NIGHT...Northeast to east winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet.
.WEDNESDAY...Northeast to east winds near 20 knots, decreasing to
near 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet.
.THURSDAY...Northeast to east winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet.
.THURSDAY NIGHT...Northeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 4 feet, subsiding to 2 to 3 feet.
.FRIDAY...Northeast to east winds near 10 knots. Seas 1 to 2
feet. Isolated showers.
.FRIDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet.

$$

CLR


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