978
FZUS52 KKEY 122127
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
427 PM EST Wed Nov 12 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.

GMZ005-130930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 PM EST Wed Nov 12 2025

.SYNOPSIS...Moderate to occasionally fresh breezes will peak
overnight, then lull to gentle to moderate in the late morning and
afternoon each day through Saturday. Thereafter, high pressure
across the Southeast U.S. will gradually sink across or just north
of the Florida Keys. This feature will also weaken such that the
coastal waters surrounding the Keys, or at least portions, will
become light and variable Sunday and Sunday night. High pressure
will then lift northward and gradually strengthen, allowing for a
slow freshening of breezes.

The Approximate Shoreward Edge of the Gulf Stream as of November
4...

42 NM South of Dry Tortugas Light...on Loggerhead Key.
42 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
30 NM South of Sand Key Light...off Key West.
29 NM South of Looe Key...off Big Pine Key.
27 NM Southeast of Sombrero Key Light...off Marathon.
14 NM Southeast of Alligator Reef Light...off Islamorada.
 4 NM Southeast of Molasses Reef Light...off Key Largo.
 3 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.

$$

GMZ031-130930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
427 PM EST Wed Nov 12 2025

.TONIGHT...Northeast winds 10 to 15 knots, increasing to near 15
knots. Bay waters a light to moderate chop, becoming a moderate
chop.
.THURSDAY...Northeast winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop.
.THURSDAY NIGHT...Northeast winds increasing to near 15 knots.
Bay waters becoming a moderate chop.
.FRIDAY...Northeast winds decreasing to 10 to 15 knots. Bay
waters becoming a light to moderate chop.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop.
.SATURDAY...Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots,
decreasing to near 10 knots. Bay waters a light to moderate chop,
becoming a light chop.
.SUNDAY...Northeast to east winds 5 to 10 knots, becoming variable
near 5 knots. Bay waters smooth to a light chop, becoming smooth.
Isolated showers.
.SUNDAY NIGHT...Variable winds near 5 knots. Bay waters smooth.
Isolated showers.
.MONDAY...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.MONDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.

$$

GMZ032-035-130930-
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-
427 PM EST Wed Nov 12 2025

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

$$

GMZ042>044-130930-
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-
427 PM EST Wed Nov 12 2025

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

.TONIGHT...Northeast winds near 15 knots, increasing to 15 to 20
knots. Seas 2 to 3 feet. Nearshore waters a moderate chop,
becoming choppy.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to
3 feet. Nearshore waters choppy.
.FRIDAY...Northeast winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a
light to moderate chop.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop.
.SATURDAY NIGHT...East winds 10 to 15 knots, decreasing to near
10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a light
to moderate chop, becoming a light chop. Isolated showers.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas subsiding to
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers.
.MONDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop. Isolated
showers.
.MONDAY NIGHT...East winds near 10 knots. Seas building to 1 to 2
feet. Nearshore waters a light chop. Isolated showers.

$$

GMZ052>055-072>075-130930-
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-
427 PM EST Wed Nov 12 2025

.TONIGHT...Northeast winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at
6 seconds and west to northwest 2 feet at 7 seconds.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
5 seconds and northwest 1 foot at 5 seconds. Isolated showers.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to
5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at
6 seconds. Isolated showers.
.FRIDAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated
showers.
.FRIDAY NIGHT...Northeast to east winds near 15 knots. Seas 3 to
4 feet, occasionally to 5 feet.
.SATURDAY...Northeast to east winds near 15 knots. Seas 3 to
4 feet, occasionally to 5 feet.
.SATURDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 2
to 3 feet. Isolated showers.
.SUNDAY...Northeast to east winds near 10 knots, decreasing to 5
to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Isolated
showers.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet,
subsiding to around 1 foot. Isolated showers.
.MONDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Isolated showers.
.MONDAY NIGHT...East winds near 10 knots, increasing to 10 to 15
knots. Seas building to 2 to 3 feet. Isolated showers.

$$

GMZ033-034-130930-
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-
427 PM EST Wed Nov 12 2025

.TONIGHT...Northeast winds 10 to 15 knots, increasing to near 15
knots. Seas 2 to 3 feet. Wave Detail: North 3 feet at 5 seconds.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 2 to 3 feet.
Wave Detail: North 3 feet at 5 seconds.
.THURSDAY NIGHT...Northeast winds near 15 knots. Seas 2 to 3
feet. Wave Detail: Northeast 3 feet at 4 seconds.
.FRIDAY...Northeast winds decreasing to 10 to 15 knots. Seas 1 to
3 feet.
.FRIDAY NIGHT...Northeast to 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...East winds near 10 knots. Seas 1 to 2 feet.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas subsiding to
around 1 foot.
.SUNDAY NIGHT...Northeast winds near 5 knots. Seas 1 foot or
less. Isolated showers.
.MONDAY...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Isolated showers.
.MONDAY NIGHT...East winds increasing to near 10 knots. Seas
around 1 foot. Isolated showers.

$$