National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 182042
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
442 PM EDT Mon Mar 18 2024

Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef to south of Dry Tortugas, and the extreme southeastern Gulf of Mexico, 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.

GMZ005-190245
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 442 PM EDT Mon Mar 18 2024

SYNOPSIS
Northerly breezes will freshen tonight as a cold front pushes through the coastal waters of the Florida Keys, bringing some shower activity at times. Breezes will turn easterly and diminish Tuesday through Wednesday. Unsettled weather at the end of the week will result in fresh to strong breezes Thursday night and Friday, followed by breezes shifting quickly to the southwest then northwest at the tail-end of the unsettled weather.

The Approximate Shoreward Edge of the Gulf Stream is currently unavailable.


GMZ031-190245
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
442 PM EDT Mon Mar 18 2024

TONIGHT
Southwest winds near 10 knots, becoming northwest to north near 15 knots. Bay waters a light chop, becoming a moderate chop. Scattered showers.

TUESDAY
North to northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Bay waters choppy, becoming a light to moderate chop. Isolated showers.

TUESDAY NIGHT AND WEDNESDAY
Northeast to east winds near 10 knots. Bay waters a light chop.

WEDNESDAY NIGHT
East winds near 10 knots. Bay waters a light chop.

THURSDAY
East winds 10 to 15 knots, increasing to near 15 knots. Bay waters a light to moderate chop, becoming a moderate chop. Isolated showers.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots, becoming southeast and increasing to near 20 knots after midnight. Bay waters choppy, becoming rough. Scattered showers.

FRIDAY
Southeast winds 20 to 25 knots, becoming south near 20 knots in the afternoon. Bay waters very rough, becoming rough. Numerous showers and isolated thunderstorms.

FRIDAY NIGHT
South to southwest winds 15 to 20 knots, decreasing to near 15 knots. Bay waters choppy, becoming a moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY
West to northwest winds 10 to 15 knots, becoming northwest near 10 knots in the afternoon. Bay waters a light to moderate chop, becoming a light chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
North winds 10 to 15 knots. Bay waters a light to moderate chop. Isolated showers and thunderstorms.


GMZ032-035-190245
Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms
442 PM EDT Mon Mar 18 2024

SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS

TONIGHT
Southwest winds near 10 knots, becoming northwest to north 15 to 20 knots late. Seas around 1 foot, building to 2 to 3 feet. Nearshore waters a light chop, becoming choppy. Scattered showers.

TUESDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet, subsiding to 1 to 3 feet. Nearshore waters choppy, becoming a light to moderate chop. Isolated showers.

TUESDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop.

WEDNESDAY
Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop.

WEDNESDAY NIGHT
East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop.

THURSDAY
East winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots, becoming southeast 20 to 25 knots after midnight. Seas 2 to 3 feet, except 3 to 5 feet west of the Marquesas Keys. Nearshore waters choppy, becoming very rough. Scattered showers.

FRIDAY
Southeast winds near 20 knots, decreasing to 15 to 20 knots in the afternoon. Seas 2 to 3 feet, except 3 to 5 feet west of the Marquesas Keys. Nearshore waters rough, becoming choppy. Numerous showers and isolated thunderstorms.

FRIDAY NIGHT
South to southwest winds near 15 knots, becoming west after midnight. Seas 1 to 3 feet, except 3 to 4 feet west of the Marquesas Keys. Nearshore waters a moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY
West to northwest winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
North winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Isolated showers and thunderstorms.


GMZ042>044-190245
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
442 PM EDT Mon Mar 18 2024

SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS

TONIGHT
Southwest winds 10 to 15 knots, becoming northwest to north 15 to 20 knots late. Seas 1 to 3 feet, building to 2 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers.

TUESDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Nearshore waters choppy, becoming a light to moderate chop. Isolated showers.

TUESDAY NIGHT
Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop.

WEDNESDAY
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop.

WEDNESDAY NIGHT
East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop.

THURSDAY
East winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots, becoming southeast 20 to 25 knots after midnight. Seas 2 to 4 feet, building to 4 to 6 feet. Nearshore waters choppy, becoming very rough. Scattered showers.

FRIDAY
Southeast winds near 20 knots, decreasing to 15 to 20 knots in the afternoon. Seas 4 to 5 feet, subsiding to 2 to 4 feet. Nearshore waters rough, becoming choppy. Numerous showers and isolated thunderstorms.

FRIDAY NIGHT
South to southwest winds near 15 knots, becoming west. Seas 2 to 3 feet. Nearshore waters a moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY
Northwest winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northwest to north winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Isolated showers and thunderstorms.


GMZ052>055-072>075-190245
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
442 PM EDT Mon Mar 18 2024

TONIGHT
Southwest winds near 10 knots, becoming northwest to north and increasing to near 15 knots after midnight. Seas 1 to 2 feet, building to 2 to 4 feet. Scattered showers.

TUESDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots. Seas 3 to 5 feet, subsiding to 2 to 4 feet. Isolated showers.

TUESDAY NIGHT
Northeast winds 10 to 15 knots, decreasing to 5 to 10 knots after midnight. Seas 2 to 3 feet.

WEDNESDAY
Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers.

THURSDAY
East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 3 to 4 feet. Isolated showers.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots, becoming southeast 20 to 25 knots after midnight. Seas 3 to 5 feet, building to 5 to 7 feet after midnight. Scattered showers.

FRIDAY
Southeast to south winds near 20 knots, becoming south and decreasing to 15 to 20 knots in the afternoon. Seas 4 to 7 feet. Numerous showers and isolated thunderstorms.

FRIDAY NIGHT
South winds near 15 knots, becoming south to southwest and decreasing to 10 to 15 knots after midnight. Seas 3 to 5 feet. Scattered showers and isolated thunderstorms.

SATURDAY
Southwest to west winds 10 to 15 knots, becoming west to northwest. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northwest to north winds 10 to 15 knots. Seas 3 to 5 feet. Isolated showers and thunderstorms.


GMZ033-034-190245
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel
442 PM EDT Mon Mar 18 2024

SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS

SMALL CRAFT ADVISORY MAY BE REQUIRED TONIGHT

TONIGHT
Southwest to west winds near 10 knots, becoming northwest to north 15 to 20 knots. Seas 1 to 2 feet, building to 3 to 5 feet after midnight. Isolated showers.

TUESDAY
North winds 15 to 20 knots, becoming north to northeast and decreasing to near 15 knots in the afternoon. Seas 4 to 6 feet, subsiding to 4 to 5 feet. Isolated showers.

TUESDAY NIGHT
North to northeast winds 10 to 15 knots. Seas 3 to 5 feet.

WEDNESDAY
Northeast to east winds near 10 knots. Seas 2 to 3 feet.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 1 to 3 feet. Isolated showers.

THURSDAY
East to southeast winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet. Isolated showers.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots, increasing to southeast 20 to 25 knots after midnight. Seas 3 to 5 feet, building to 4 to 6 feet after midnight. Scattered showers.

FRIDAY
Southeast to south winds 20 to 25 knots, becoming south and decreasing to near 20 knots. Seas 5 to 7 feet. Numerous showers and isolated thunderstorms.

FRIDAY NIGHT
South to southwest winds 15 to 20 knots, becoming west and decreasing to near 15 knots. Seas 4 to 6 feet, subsiding to 3 to 5 feet. Scattered showers and isolated thunderstorms.

SATURDAY
West to northwest winds 10 to 15 knots, becoming north. Seas 3 to 4 feet. Isolated showers and thunderstorms.

SATURDAY NIGHT
North winds near 15 knots. Seas 4 to 5 feet. Isolated showers and thunderstorms.


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