975
FZUS52 KKEY 092117
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 PM EST Sun Nov 9 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.

GMZ005-100930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 PM EST Sun Nov 9 2025

.SYNOPSIS...A potent cold front will push through the Florida
Keys marine zones on Monday, bringing fresh to strong northerly
winds by Monday afternoon. 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 through the end of the work week.

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.

$$

GMZ031-100930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 PM EST Sun Nov 9 2025

...SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED MONDAY...

.TONIGHT...Variable winds near 5 knots, becoming west to northwest
winds and increasing to near 10 knots. Bay waters smooth,
becoming a light chop. Isolated showers.
.MONDAY...West to northwest winds 10 to 15 knots, becoming
northwest and increasing to 20 to 25 knots. Bay waters a light to
moderate chop, becoming very rough. Scattered showers.
.MONDAY NIGHT...Northwest to north winds 25 to 30 knots. Bay
waters extremely rough.
.TUESDAY...North winds near 25 knots, becoming north to northeast
20 to 25 knots. Bay waters extremely rough, becoming very rough.
.TUESDAY NIGHT...North to northeast winds 20 to 25 knots,
decreasing to 15 to 20 knots. Bay waters very rough, becoming
choppy.
.WEDNESDAY...Northeast to east winds near 15 knots. Bay waters a
moderate chop.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop.
.THURSDAY...Northeast winds near 15 knots. Bay waters a moderate
chop.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...Northeast winds 10 to 15
knots. Bay waters a light to moderate chop.

$$

GMZ032-035-100930-
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-
417 PM EST Sun Nov 9 2025

...SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED MONDAY...

.TONIGHT...Variable winds near 5 knots, becoming west to northwest
and increasing to near 10 knots. Seas 1 foot or less, building to
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. Seas 1 to 2 feet,
building to 3 to 5 feet, occasionally to 6 feet. West of the
Marquesas Keys, seas around 2 feet, building to 5 to 7 feet,
occasionally to 9 feet. Nearshore waters a light to moderate
chop, becoming extremely rough. Scattered showers.
.MONDAY NIGHT...North winds near 30 knots. Seas 4 to 6 feet,
occasionally to 8 feet, except 8 to 10 feet, occasionally to 13
feet west of the Marquesas Keys. Nearshore waters extremely rough.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except
7 to 10 feet, occasionally to 13 feet west of the Marquesas Keys.
Nearshore waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5
to 7 feet, occasionally to 9 feet west of the Marquesas Keys.
Nearshore waters very 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 10 to 15 knots. Seas 2 to
3 feet, except around 3 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop.
.THURSDAY...Northeast winds near 15 knots. Seas 2 to 3 feet,
except around 3 feet west of the Marquesas Keys. Nearshore waters
a moderate chop.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...Northeast winds 10 to 15
knots. Seas 1 to 2 feet, except around 2 feet west of the
Marquesas Keys. Nearshore waters a light to moderate chop.

$$

GMZ042>044-100930-
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-
417 PM EST Sun Nov 9 2025

...SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED MONDAY...

.TONIGHT...Variable winds near 5 knots, becoming west to
northwest and increasing to near 10 knots. Seas around 1 foot,
building to 1 to 2 feet. Nearshore waters smooth, becoming a
light chop. Isolated showers.
.MONDAY...West to northwest winds 10 to 15 knots, becoming
northwest to north and increasing to 25 to 30 knots. Seas 1 to 2
feet, building to building to 3 to 5 feet, occasionally to 6 feet.
West of Cosgrove Shoal Light, around 2 feet, building to 4 to 6
feet, occasionally to 8 feet. Nearshore waters very rough,
increasing extremely rough in the afternoon. Scattered showers.
.MONDAY NIGHT...North winds 25 to 30 knots. Seas 4 to 6 feet,
occasionally to 8 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
20 to 25 knots. Seas 4 to 6 feet, occasionally to 9 feet, except
6 to 8 feet, occasionally to 10 feet west of Cosgrove Shoal Light.
Nearshore waters extremely rough, becoming very rough.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, becoming 15 to
20 knots. Seas subsiding to 2 to 4 feet, occasionally to 5 feet,
except subsiding to 4 to 6 feet, occasionally to 8 feet west of
Cosgrove Shoal Light. Nearshore waters very rough, becoming choppy.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
3 feet, except 3 to 5 feet, occasionally to 6 feet west of
Cosgrove Shoal Light. Nearshore waters choppy.
.WEDNESDAY NIGHT THROUGH FRIDAY NIGHT...Northeast winds near 15
knots. Seas 2 to 3 feet. Nearshore waters a moderate chop.

$$

GMZ052>055-072>075-100930-
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-
417 PM EST Sun Nov 9 2025

.TONIGHT..Variable winds near 5 knots, becoming west to northwest
and increasing to 10 to 15 knots. Seas around 1 foot, building to
1 to 2 feet. Wave Detail: East 1 foot at 3 seconds. Scattered
showers.
.MONDAY...West to northwest winds near 15 knots, becoming
northwest to north and increasing to 25 to 30 knots. Seas 2 to 4
feet, building to 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northwest 2 feet at 4 seconds, becoming northwest 6 feet
at 6 seconds. Scattered showers.
.MONDAY NIGHT...Northwest to north winds near 30 knots. Seas 5 to
8 feet, occasionally to 10 feet, building to 8 to 11 feet,
occasionally to 14 feet. Wave Detail: Northwest to north 8 feet
at 7 seconds, becoming north to northeast 9 feet at 7 seconds and
northwest 9 feet at 9 seconds.
.TUESDAY...North to northeast winds 25 to 30 knots, decreasing to
near 25 knots. Seas 8 to 11 feet, occasionally to 14 feet,
subsiding to 7 to 10 feet, occasionally to 12 feet.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots, decreasing to
near 20 knots. Seas 6 to 9 feet, occasionally to 11 feet.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 5 to
7 feet, occasionally to 9 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
4 to 6 feet, occasionally to 8 feet. Isolated showers.
.THURSDAY AND THURSDAY NIGHT...Northeast winds 15 to 20 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers.
.FRIDAY...Northeast winds near 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...Northeast to east winds near 15 knots. Seas 2 to
4 feet, occasionally to 5 feet.

$$

GMZ033-034-100930-
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-
417 PM EST Sun Nov 9 2025

...SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED MONDAY...

.TONIGHT...West to northwest winds near 5 knots, increasing to
near 15 knots. Seas around 1 foot, building to 1 to 2 feet. Wave
Detail: West to northwest 1 foot at 2 seconds, becoming west to
northwest 1 foot at 3 seconds. Scattered showers.
.MONDAY...Northwest winds 15 to 20 knots, increasing to near 30
knots. Seas 2 to 3 feet, building to 6 to 9 feet, occasionally to
11 feet. Wave Detail: Northwest 3 feet at 6 seconds, becoming
northwest to north 9 feet at 8 seconds. Scattered showers.
.MONDAY NIGHT...North winds near 30 knots. Seas 8 to 10 feet,
occasionally to 13 feet. Wave Detail: North 10 feet at 7 seconds.
.TUESDAY...North to northeast winds 25 to 30 knots, becoming
northeast and decreasing to 20 to 25 knots. Seas 8 to 10 feet,
occasionally to 13 feet, subsiding to 6 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 6 feet, occasionally to 8 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 to east winds near 15 knots. Seas 2
to 3 feet.
.THURSDAY AND THURSDAY NIGHT...Northeast winds near 15 knots.
Seas 2 to 3 feet.
.FRIDAY AND FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2
to 3 feet.

$$

BT/JAM