Station List

National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 120930
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 AM EST Mon Jan 12 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.

GMZ005-122130
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 430 AM EST Mon Jan 12 2026

SYNOPSIS
A frontal boundary progressing into the area will lead to a short period of fresh to strong breezes through the morning hours before slackening this afternoon. A relatively weak area of high pressure will gradually slide into the southeastern U.S. and allow breezes to slacken back to gentle to moderate by Tuesday. Thereafter, a pre- frontal trough will slide across the region on Wednesday, briefly clocking winds around to the southeast initially, then southwest, and eventually west to northwest. This will be followed by a second, stronger cold front on Thursday with another round of fresh to potentially strong breezes.

The Approximate Shoreward Edge of the Gulf Stream as of January 12...

19 NM South of Dry Tortugas Light...on Loggerhead Key. 13 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 15 NM South of Sand Key Light...off Key West. 17 NM South of Looe Key...off Big Pine Key. 17 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. 5 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.

GMZ031-122130
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
430 AM EST Mon Jan 12 2026

SMALL CRAFT ADVISORY IN EFFECT

TODAY
North to northeast winds near 20 knots, decreasing to 15 to 20 knots. Bay waters rough, becoming choppy. Scattered showers.

TONIGHT
Northeast winds near 15 knots, decreasing to 10 to 15 knots. Bay waters a moderate chop, becoming a light to moderate chop. Isolated showers.

TUESDAY
Northeast to east winds near 10 knots. Bay waters a light chop. Scattered showers.

TUESDAY NIGHT
East winds 5 to 10 knots, becoming variable near 5 knots. Bay waters smooth to a light chop, becoming smooth. Isolated showers.

WEDNESDAY
Variable winds near 5 knots, becoming west. Bay waters smooth. Scattered showers.

WEDNESDAY NIGHT
West to northwest winds 5 to 10 knots, increasing to near 10 knots. Bay waters smooth to a light chop, becoming a light chop. Scattered showers.

THURSDAY
West winds 10 to 15 knots, becoming west to northwest 15 to 20 knots. Bay waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms.

THURSDAY NIGHT
Northwest to north winds near 20 knots, decreasing to 15 to 20 knots. Bay waters rough, becoming choppy. Isolated showers.

FRIDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots. Bay waters choppy, becoming a light to moderate chop.

FRIDAY NIGHT
North to northeast winds near 10 knots. Bay waters a light chop.

GMZ032-035-122130
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
430 AM EST Mon Jan 12 2026

SMALL CRAFT ADVISORY IN EFFECT

TODAY
Northeast winds near 20 knots, decreasing to 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 rough, becoming choppy. Isolated showers.

TONIGHT
Northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop, becoming a light to moderate chop. Isolated showers.

TUESDAY
Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. Isolated showers.

TUESDAY NIGHT
Northeast to east winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming smooth. Isolated showers.

WEDNESDAY
Variable winds near 5 knots, becoming northwest. Seas 1 foot or less. Nearshore waters smooth. Scattered showers.

WEDNESDAY NIGHT
West to northwest winds 5 to 10 knots, increasing to 10 to 15 knots. Seas 1 foot or less, building to 1 to 2 feet. Nearshore waters smooth to a light chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms.

THURSDAY
West to northwest winds near 15 knots, increasing to near 20 knots. Seas 1 to 2 feet, building to 2 to 4 feet, occasionally to 5 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 4 to 5 feet, occasionally to 6 feet. Nearshore waters a moderate chop, becoming rough. Scattered showers and isolated thunderstorms.

THURSDAY NIGHT
Northwest to north winds 20 to 25 knots, becoming north near 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 6 to 7 feet, occasionally to 9 feet west of the Marquesas Keys. Nearshore waters very rough, becoming rough. Isolated showers.

FRIDAY
North to northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 4 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters choppy, becoming a light to moderate chop.

FRIDAY NIGHT
Northeast winds near 10 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a light chop.

GMZ042>044-122130
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
430 AM EST Mon Jan 12 2026

SMALL CRAFT ADVISORY IN EFFECT

TODAY
North to northeast winds near 20 knots, decreasing to 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 rough, becoming choppy. Scattered showers.

TONIGHT
Northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a moderate chop, becoming a light to moderate chop. Scattered showers.

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

TUESDAY NIGHT
Northeast to east winds 5 to 10 knots, becoming variable near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters smooth to a light chop, becoming smooth. Isolated showers.

WEDNESDAY
Variable winds near 5 knots, becoming west to northwest 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth, becoming smooth to a light chop. Scattered showers and isolated thunderstorms.

WEDNESDAY NIGHT
Northwest winds near 10 knots, increasing to 10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms.

THURSDAY
West to northwest winds near 15 knots, increasing to near 20 knots. Seas 1 to 2 feet, building to 2 to 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop, becoming rough. Scattered showers and isolated thunderstorms.

THURSDAY NIGHT
Northwest to north winds 20 to 25 knots, decreasing to near 20 knots. Seas 2 to 3 feet. West of Cosgrove Shoal Light, seas 4 to 6 feet, occasionally to 8 feet, building to 6 to 7 feet, occasionally to 9 feet. Nearshore waters very rough, becoming rough. Isolated showers.

FRIDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a light to moderate chop.

FRIDAY NIGHT
Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming smooth to a light chop.

GMZ052>055-072>075-122130
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
430 AM EST Mon Jan 12 2026

SMALL CRAFT ADVISORY IN EFFECT

TODAY
Northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: North 5 feet at 7 seconds. Scattered showers and isolated thunderstorms.

TONIGHT
Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 6 seconds and west to northwest 3 feet at 8 seconds. Scattered showers and isolated thunderstorms.

TUESDAY
Northeast to east winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 7 seconds and northwest 2 feet at 7 seconds. Scattered showers and isolated thunderstorms.

TUESDAY NIGHT
East winds 5 to 10 knots, becoming variable near 5 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Isolated showers.

WEDNESDAY
Variable winds near 5 knots, becoming west. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms.

WEDNESDAY NIGHT
West to northwest winds 5 to 10 knots, increasing to 10 to 15 knots. Seas around 1 foot, building to around 2 feet. Scattered showers and isolated thunderstorms.

THURSDAY
West to northwest winds 15 to 20 knots, increasing to near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers and isolated thunderstorms.

THURSDAY NIGHT
Northwest to north winds 20 to 25 knots, decreasing to near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated showers.

FRIDAY
North winds 15 to 20 knots, becoming north to northeast 10 to 15 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet.

FRIDAY NIGHT
Northeast winds 10 to 15 knots, becoming northeast to east 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet.

GMZ033-034-122130
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
430 AM EST Mon Jan 12 2026

SMALL CRAFT ADVISORY IN EFFECT

TODAY
North to northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Wave Detail: North to northeast 5 feet at 5 seconds and northwest 4 feet at 8 seconds. Isolated showers.

TONIGHT
Northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas subsiding to 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest to north 4 feet at 8 seconds and northeast 2 feet at 4 seconds. Isolated showers.

TUESDAY
Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: North 2 feet at 5 seconds. Isolated showers.

TUESDAY NIGHT
North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers.

WEDNESDAY
North winds near 5 knots. Seas around 1 foot. Scattered showers.

WEDNESDAY NIGHT
Northwest winds 5 to 10 knots, becoming west 10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. Scattered showers.

THURSDAY
West to northwest winds 15 to 20 knots, increasing to 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. Scattered showers and isolated thunderstorms.

THURSDAY NIGHT
Northwest to north winds 15 to 20 knots, decreasing to near 15 knots. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers.

FRIDAY
North to northeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 5 to 7 feet, occasionally to 9 feet.

FRIDAY NIGHT
Northeast winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet.

DP