075
FZUS52 KKEY 121422
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1022 AM EDT Sun Oct 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.

GMZ005-130230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1022 AM EDT Sun Oct 12 2025

.SYNOPSIS...Light to gentle north to northeasterly breezes
expected this afternoon and tonight as the Keys remain in between
low pressure off the North Carolina Coast and high pressure
building in across the northern Gulf Coast. Expect north to
northeasterly swells across the eastern marine zones this
afternoon due to the low off the North Carolina coast. High
pressure will build across the eastern United States to start the
week, leading to freshening mainly northeasterly breezes.

The Approximate Shoreward Edge of the Gulf Stream as of October
08...

46 NM South of Dry Tortugas Light...on Loggerhead Key.
27 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
21 NM South of Sand Key Light...off Key West.
30 NM South of Looe Key...off Big Pine Key.
14 NM Southeast of Sombrero Key Light...off Marathon.
 8 NM Southeast of Alligator Reef Light...off Islamorada.
 7 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.

$$

GMZ031-130230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1022 AM EDT Sun Oct 12 2025

.THIS AFTERNOON...North to northeast winds near 10 knots,
becoming variable and decreasing to near 5 knots. Bay waters a
light chop, becoming smooth. Isolated showers.
.TONIGHT...North to northeast winds near 5 knots. Bay waters
smooth. Isolated showers.
.MONDAY...Northeast winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers.
.MONDAY NIGHT...Northeast winds near 10 knots, increasing to 10
to 15 knots. Bay waters a light chop, becoming a light to
moderate chop. Isolated showers.
.TUESDAY...Northeast winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds near 15 knots. Bay waters a
moderate chop. Isolated showers.
.WEDNESDAY...North to northeast winds 10 to 15 knots, becoming
northeast and decreasing to 5 to 10 knots. Bay waters a light to
moderate chop, becoming smooth to a light chop. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 5 to 10 knots,
increasing to 10 to 15 knots. Bay waters smooth to a light chop,
becoming a light to moderate chop. Isolated showers.
.THURSDAY...North to northeast winds 10 to 15 knots, becoming
northeast to east and decreasing to 5 to 10 knots. Bay waters a
light to moderate chop, becoming smooth to a light chop. Isolated
showers.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.

$$

GMZ032-035-130230-
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-
1022 AM EDT Sun Oct 12 2025

.THIS AFTERNOON...North to northeast winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet
west of the Marquesas Keys due to a northerly swell. Nearshore
waters a light chop, becoming smooth to a light chop. Isolated
showers.
.TONIGHT...North to northeast winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. Isolated
showers.
.MONDAY...Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. Isolated showers.
.MONDAY NIGHT...Northeast winds near 10 knots, increasing to near
15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west
of the Marquesas Keys. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.TUESDAY...Northeast winds 15 to 20 knots, decreasing to 10 to 15
knots in the afternoon. Seas 1 to 3 feet, except around 3 feet
west of the Marquesas Keys. Nearshore waters choppy, becoming a
light to moderate chop. Isolated showers.
.TUESDAY NIGHT...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. Isolated showers.
.WEDNESDAY...Northeast winds near 15 knots, decreasing to 10 to
15 knots. Seas 2 to 3 feet, except around 3 feet west of the
Marquesas Keys. Nearshore waters a moderate chop, becoming a light
to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds near 10 knots,
becoming northeast and increasing to 10 to 15 knots. Seas 1 to 2
feet, except around 2 feet west of the Marquesas Keys. Nearshore
waters a light chop, becoming a light to moderate chop. Isolated
showers.
.THURSDAY...Northeast winds 10 to 15 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop, becoming smooth to a light chop. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 10 knots,
increasing to 10 to 15 knots. Seas 1 to 2 feet, except around 2
feet west of the Marquesas Keys. Nearshore waters a light chop,
becoming a light to moderate chop. Isolated showers.

$$

GMZ042>044-130230-
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-
1022 AM EDT Sun Oct 12 2025

.THIS AFTERNOON...North to northeast winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet
west of Cosgrove Shoal Light due to a northerly swell. Nearshore
waters a light chop, becoming smooth to a light chop. Isolated
showers.
.TONIGHT...North to northeast winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. Isolated
showers.
.MONDAY...Northeast winds 5 to 10 knots, increasing to near 10
knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop,
becoming a light chop. Isolated showers.
.MONDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Seas around 2 feet, building to 2 to 3 feet. Nearshore
waters a light to moderate chop, becoming a moderate chop.
Isolated showers.
.TUESDAY...Northeast winds 15 to 20 knots, decreasing to near 15
knots. Seas around 3 feet. Nearshore waters choppy, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.WEDNESDAY...Northeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet, subsiding to around 2 feet. Nearshore
waters a moderate chop, becoming a light to moderate chop.
Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
Isolated showers.

$$

GMZ052>055-072>075-130230-
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-
1022 AM EDT Sun Oct 12 2025

.THIS AFTERNOON...Northwest to north winds 5 to 10 knots,
becoming north to northeast. Seas 2 to 4 feet, occasionally to 5
feet due to a northerly swell. Wave Detail: West to northwest 3
feet at 7 seconds. Isolated showers.
.TONIGHT...North to northeast winds 5 to 10 knots. Seas 2 to 3
feet. Wave Detail: West to northwest 2 feet at 7 seconds.
Isolated showers.
.MONDAY...Northeast winds 5 to 10 knots, increasing to near 10
knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 4
seconds and west to northwest 2 feet at 6 seconds. Isolated
showers.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots, increasing
to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet,
occasionally to 5 feet. Scattered showers.
.TUESDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Scattered showers.
.TUESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Scattered showers.
.WEDNESDAY...Northeast winds 15 to 20 knots, decreasing to 10 to
15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated
showers.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to
4 feet, occasionally to 5 feet. Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 4 feet, occasionally to 5 feet. Scattered showers.

$$

GMZ033-034-130230-
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-
1022 AM EDT Sun Oct 12 2025

.THIS AFTERNOON...North to northeast winds near 10 knots. Seas 2
to 4 feet, occasionally to 5 feet due to a northerly swell. Wave
Detail: Northwest to north 3 feet at 6 seconds. Isolated showers.
.TONIGHT...North to northeast winds near 10 knots. Seas 2 to
3 feet. Wave Detail: Northwest to north 2 feet at 6 seconds.
Isolated showers.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: North 2 feet at 4 seconds. Isolated showers.
.MONDAY NIGHT...Northeast winds 10 to 15 knots, increasing to near
15 knots. Seas around 2 feet, building to 2 to 3 feet. Isolated
showers.
.TUESDAY...Northeast winds 15 to 20 knots, decreasing to 10 to 15
knots in the afternoon. Seas 2 to 3 feet. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
near 15 knots after midnight. Seas 2 to 3 feet. Isolated showers.
.WEDNESDAY...Northeast winds near 15 knots, decreasing to 10 to
15 knots. Seas 2 to 3 feet. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Isolated showers.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, becoming
northeast to east and increasing to 15 to 20 knots. Seas 1 to 3
feet, building to 2 to 3 feet. Isolated showers.

$$