749
FZUS52 KKEY 080919
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
419 AM EST Sat Nov 8 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.

GMZ005-082130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 AM EST Sat Nov 8 2025

.SYNOPSIS...High pressure will continue to slide eastward across
the central North Atlantic today and Sunday. This will result in
mainly light east to southeast breezes, potentially becoming
variable at times. A potent cold front will push through the
Florida Keys marine zones on Monday with fresh to strong
northerlies expected in its wake early next week. While the next
high builds in behind the front, winds will shift out of the
northeast and gradually slacken. Moderate to occasionally fresh
breezes will remain possible.

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.

$$

GMZ031-082130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
419 AM EST Sat Nov 8 2025

.TODAY...East to southeast winds near 5 knots. Bay waters smooth.
.TONIGHT...East to southeast winds near 5 knots. Bay waters
smooth.
.SUNDAY...Southeast winds near 5 knots, becoming variable in the
afternoon. Bay waters smooth. Isolated showers.
.SUNDAY NIGHT...West winds near 5 knots, becoming west to
northwest and increasing to near 10 knots after midnight. Bay
waters smooth, becoming a light chop. Isolated showers.
.MONDAY...Northwest winds 10 to 15 knots, increasing to 20 to 25
knots in the afternoon. Bay waters a light to moderate chop,
becoming very rough. Isolated showers.
.MONDAY NIGHT...Northwest to north winds near 25 knots. Bay
waters extremely rough.
.TUESDAY...North to northeast winds 20 to 25 knots, decreasing to
near 20 knots. Bay waters very rough, becoming rough.
.TUESDAY NIGHT...Northeast winds 15 to 20 knots. Bay waters
choppy.
.WEDNESDAY...Northeast to east winds near 15 knots. Bay waters a
moderate chop.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Bay waters a
moderate chop.

$$

GMZ032-035-082130-
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-
419 AM EST Sat Nov 8 2025

.TODAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.TONIGHT...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.SUNDAY...East to southeast winds near 5 knots in the morning,
becoming variable. Seas 1 foot or less. Nearshore waters smooth.
Isolated showers.
.SUNDAY NIGHT...West to northwest winds near 5 knots, increasing
to near 10 knots after midnight. Seas 1 foot or less. Nearshore
waters smooth, becoming a light chop. Isolated showers.
.MONDAY...Northwest winds 10 to 15 knots, becoming northwest to
north and increasing to near 25 knots in the afternoon. Seas 1 to
2 feet, building to 3 to 5 feet, occasionally to 6 feet. West of
the Marquesas Keys, seas 2 to 3 feet, building to 6 to 7 feet,
occasionally to 9 feet. Nearshore waters a light to moderate chop,
becoming extremely rough. Isolated showers.
.MONDAY NIGHT...Northwest to north winds 25 to 30 knots. Seas 4
to 6 feet, occasionally to 8 feet, except 8 to 11 feet,
occasionally to 14 feet west of the Marquesas Keys. Nearshore
waters extremely rough.
.TUESDAY...North to northeast winds 25 to 30 knots, becoming
northeast and decreasing to near 20 knots in the afternoon. Seas
4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys,
seas 8 to 10 feet, occasionally to 13 feet, subsiding to 6 to 7
feet, occasionally to 9 feet. Nearshore waters extremely rough,
becoming rough.
.TUESDAY NIGHT...Northeast winds near 20 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding
to 2 to 4 feet, occasionally to 6 feet. West of the Marquesas
Keys, seas 5 to 7 feet, occasionally to 8 feet, subsiding to 4 to
5 feet, occasionally to 6 feet. Nearshore waters rough, becoming
choppy.
.WEDNESDAY...Northeast winds 15 to 20 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 choppy.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 3 to 4 feet, occasionally
to 6 feet west of the Marquesas Keys. Nearshore waters choppy.

$$

GMZ042>044-082130-
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-
419 AM EST Sat Nov 8 2025

.TODAY...East to southeast winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. Isolated showers.
.TONIGHT...East to southeast winds near 5 knots. Seas around 1
foot. Nearshore waters smooth. Isolated showers.
.SUNDAY...Southeast winds near 5 knots, becoming variable in the
afternoon. Seas around 1 foot. Nearshore waters smooth. Isolated
showers.
.SUNDAY NIGHT...Northwest winds near 5 knots, increasing to near
10 knots. Seas around 1 foot. Nearshore waters smooth, becoming a
light chop. Isolated showers.
.MONDAY...Northwest winds 10 to 15 knots, becoming northwest to
north and increasing to 25 to 30 knots in the afternoon. Seas 1
to 2 feet, building to 2 to 3 feet. West of Cosgrove Shoal Light,
seas 2 to 3 feet, building to 5 to 7 feet, occasionally to 9 feet.
Nearshore waters a light to moderate chop, becoming extremely
rough. Isolated showers.
.MONDAY NIGHT...Northwest to north winds 25 to 30 knots, becoming
north. Seas 2 to 4 feet, occasionally to 5 feet, except 6 to 9
feet, occasionally to 11 feet west of Cosgrove Shoal Light.
Nearshore waters extremely rough.
.TUESDAY...North to northeast winds 25 to 30 knots, becoming
northeast and decreasing to 20 to 25 knots in the afternoon. Seas
2 to 4 feet, occasionally to 5 feet, except 5 to 8 feet,
occasionally to 10 feet west of Cosgrove Shoal Light. Nearshore
waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, except 4 to 6 feet, occasionally to 8
feet west of Cosgrove Shoal Light. Nearshore waters rough.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Nearshore waters choppy.

$$

GMZ052>055-072>075-082130-
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-
419 AM EST Sat Nov 8 2025

.TODAY...East to southeast winds near 5 knots. Seas around
1 foot. Wave Detail: East 1 foot at 4 seconds. Isolated showers.
.TONIGHT...East to southeast winds 5 to 10 knots. Seas around
1 foot. Wave Detail: East 1 foot at 4 seconds. Isolated showers.
.SUNDAY...Southeast winds near 5 knots, becoming variable. Seas
around 1 foot. Wave Detail: East to southeast 1 foot at 3
seconds. Isolated showers.
.SUNDAY NIGHT...Northwest to north winds near 5 knots, becoming
northwest and increasing to near 10 knots after midnight. Seas
around 1 foot, building to 1 to 2 feet. Isolated showers.
.MONDAY...Northwest winds 10 to 15 knots, becoming northwest to
north and increasing to 20 to 25 knots in the afternoon. Seas 2
to 3 feet, building to 4 to 7 feet, occasionally to 9 feet.
Isolated showers.
.MONDAY NIGHT...Northwest to north winds 25 to 30 knots, becoming
north. Seas 5 to 8 feet, occasionally to 10 feet, building to 7
to 10 feet, occasionally to 13 feet.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
near 25 knots in the afternoon. Seas 7 to 10 feet, occasionally
to 13 feet.
.TUESDAY NIGHT...Northeast to east winds 20 to 25 knots,
decreasing to near 20 knots. Seas 7 to 10 feet, occasionally to
12 feet, subsiding to 5 to 8 feet, occasionally to 10 feet.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 5 to
7 feet, occasionally to 9 feet, subsiding to 4 to 6 feet,
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
4 to 6 feet, occasionally to 8 feet. Isolated showers.

$$

GMZ033-034-082130-
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-
419 AM EST Sat Nov 8 2025

.TODAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Isolated showers.
.TONIGHT...East to southeast winds near 5 knots. Seas 1 foot or
less.
.SUNDAY...Southeast winds near 5 knots, becoming variable in the
afternoon. Seas 1 foot or less. Isolated showers.
.SUNDAY NIGHT...West to northwest near 5 knots, increasing to 10
to 15 knots after midnight. Seas 1 foot or less, building to 1 to
2 feet. Isolated showers.
.MONDAY...Northwest to north winds 15 to 20 knots, becoming
northwest to north and increasing to 25 to 30 knots in the
afternoon. Seas 2 to 4 feet, occasionally to 5 feet, building to 7
to 10 feet, occasionally to 13 feet. Isolated showers.
.MONDAY NIGHT...Northwest to north winds 25 to 30 knots, becoming
north. Seas 8 to 10 feet, occasionally to 13 feet.
.TUESDAY...North to northeast winds 25 to 30 knots, becoming
northeast and decreasing to 20 to 25 knots in the afternoon. Seas
7 to 10 feet, occasionally to 13 feet, subsiding to 5 to 8 feet,
occasionally to 10 feet.
.TUESDAY NIGHT...Northeast winds near 20 knots, decreasing to 15
to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding
to 4 to 5 feet, occasionally to 6 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Seas 2 to
4 feet, occasionally to 5 feet.

$$

MJV