National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 081433
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1033 AM EDT Wed Apr 8 2026

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.

GMZ005-090245
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1033 AM EDT Wed Apr 8 2026

SYNOPSIS
A stalled frontal boundary near the Florida Keys is responsible for the slow moving showers across the Keys coastal waters. Seas will be elevated in the western marine zones due to a northwest swell. While light to gentle breezes will prevail through tonight, the front is forecast to move south of the Keys by tomorrow morning. Dry air and fresh breezes will surge in behind the front.

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

19 NM South of Dry Tortugas Light...on Loggerhead Key. 23 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 33 NM South of Sand Key Light...off Key West. 39 NM South of Looe Key...off Big Pine Key. 23 NM Southeast of Sombrero Key Light...off Marathon. 15 NM Southeast of Alligator Reef Light...off Islamorada. 10 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.

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GMZ031-090245
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
1033 AM EDT Wed Apr 8 2026

TODAY
North to northeast winds 5 to 10 knots, becoming variable. Bay waters smooth to a light chop, becoming smooth. A chance of showers with a slight chance of thunderstorms.

TONIGHT
North to northeast winds 5 to 10 knots. Bay waters smooth to a light chop. A chance of showers with a slight chance of thunderstorms.

THURSDAY
Northeast to east winds near 10 knots, increasing to 15 to 20 knots. Bay waters a light chop, becoming choppy. A chance of showers with a slight chance of thunderstorms.

THURSDAY NIGHT
Northeast winds near 20 knots. Bay waters rough. A chance of showers.

FRIDAY
Northeast to east winds near 20 knots. Bay waters rough. A slight chance of showers.

FRIDAY NIGHT
Northeast to east winds near 20 knots. Bay waters rough. A slight chance of showers.

SATURDAY
Northeast to east winds near 20 knots. Bay waters rough. A slight chance of showers.

SATURDAY NIGHT
Northeast to east winds near 20 knots. Bay waters rough. A slight chance of showers.

SUNDAY
Northeast to east winds 20 to 25 knots. Bay waters very rough.

SUNDAY NIGHT
Northeast to east winds 20 to 25 knots. Bay waters very rough.

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GMZ032-035-090245
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
1033 AM EDT Wed Apr 8 2026

TODAY
Northeast winds 5 to 10 knots, becoming variable. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys due to northwest swell. Nearshore waters smooth to a light chop. A chance of showers with a slight chance of thunderstorms.

TONIGHT
Northeast winds near 10 knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys due to northwest swell.. Nearshore waters a light chop. A chance of showers with a slight chance of thunderstorms.

THURSDAY
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. A chance of showers with a slight chance of thunderstorms.

THURSDAY NIGHT
Northeast to east winds 15 to 20 knots, increasing to near 20 knots. Seas building to 2 to 3 feet, except building to 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters choppy, becoming rough. A slight chance of showers.

FRIDAY
Northeast to east winds 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters very rough. A slight chance of showers.

FRIDAY 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. A slight chance of showers.

SATURDAY
Northeast to east winds near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters rough. A slight chance of showers.

SATURDAY NIGHT
Northeast to east winds near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except around 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters rough.

SUNDAY
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.

SUNDAY NIGHT
East winds 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 5 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters very rough.

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GMZ042>044-090245
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
1033 AM EDT Wed Apr 8 2026

TODAY
Northeast winds near 10 knots, becoming variable. Seas 1 foot, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming smooth to a light chop. A chance of showers with a slight chance of thunderstorms.

TONIGHT
Northeast winds 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop. A chance of showers with a slight chance of thunderstorms.

THURSDAY
Northeast to east winds near 10 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet. Nearshore waters a light chop, becoming choppy. A chance of showers with a slight chance of thunderstorms.

THURSDAY NIGHT
Northeast to east winds near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters rough. A slight chance of showers.

FRIDAY
Northeast to east winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters very rough. A slight chance of showers.

FRIDAY NIGHT
Northeast to east winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters very rough. A slight chance of showers.

SATURDAY
Northeast to east winds near 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters rough. A slight chance of showers.

SATURDAY NIGHT
Northeast to east winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters very rough.

SUNDAY
Northeast to east winds 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters very rough.

SUNDAY NIGHT
East winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Nearshore waters very rough.

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GMZ052>055-072>075-090245
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
1033 AM EDT Wed Apr 8 2026

TODAY
Northeast winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northwest 3 feet at 8 seconds and north to northeast 3 feet at 11 seconds. A chance of showers with a slight chance of thunderstorms.

TONIGHT
Northeast to east winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 11 seconds and northwest 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY
Northeast winds 5 to 10 knots, increasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 3 feet at 11 seconds and northwest 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers.

FRIDAY
Northeast to east winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers.

FRIDAY NIGHT
Northeast to east winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. A slight chance of showers.

SATURDAY
Northeast to east winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers.

SATURDAY NIGHT
Northeast to east winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. A slight chance of showers.

SUNDAY
Northeast to east winds 20 to 25 knots. Seas 6 to 9 feet, occasionally to 11 feet.

SUNDAY NIGHT
East winds near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet.

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GMZ033-034-090245
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
1033 AM EDT Wed Apr 8 2026

TODAY
Northeast winds 10 to 15 knots, becoming north to northeast 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest to north 4 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms.

TONIGHT
Northeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 4 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY
Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North to northeast 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY NIGHT
Northeast to east winds 15 to 20 knots, increasing to 20 to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet after midnight. A slight chance of showers.

FRIDAY
Northeast to east winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers.

FRIDAY NIGHT
Northeast to east winds 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers.

SATURDAY
Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers.

SATURDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet.

SUNDAY
Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet.

SUNDAY NIGHT
East winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet.