National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 240925
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
425 AM EST Wed Dec 24 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.

GMZ005-242130
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 425 AM EST Wed Dec 24 2025

SYNOPSIS
High pressure across the Southeast U.S. will continue to slowly meander to the northeastern Gulf through Christmas morning. This will continue to promote moderate to fresh breezes. The high will weaken as it continues to slowly drift southeastward through the weekend leading to slackening breezes.

The Approximate Shoreward Edge of the Gulf Stream as of December 21...

24 NM South of Dry Tortugas Light...on Loggerhead Key. 14 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 14 NM South of Sand Key Light...off Key West. 16 NM South of Looe Key...off Big Pine Key. 17 NM Southeast of Sombrero Key Light...off Marathon. 18 NM Southeast of Alligator Reef Light...off Islamorada. 11 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.

---

GMZ031-242130
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
425 AM EST Wed Dec 24 2025

TODAY
Northeast to east winds 10 to 15 knots. Bay waters a light to moderate chop. Isolated showers.

TONIGHT
Northeast winds 10 to 15 knots. Bay waters a light to moderate chop.

THURSDAY
Northeast winds near 10 knots, decreasing to near 5 knots. Bay waters a light chop, becoming smooth.

THURSDAY NIGHT
Northeast to east winds near 5 knots, becoming northwest to north and increasing to 5 to 10 knots after midnight. Bay waters smooth, becoming smooth to a light chop. Isolated showers.

FRIDAY
North to northeast winds 5 to 10 knots, becoming variable and decreasing to near 5 knots. Bay waters smooth to a light chop, becoming smooth.

FRIDAY NIGHT
Variable winds near 5 knots, becoming northwest to north. Bay waters smooth.

SATURDAY
North to northeast winds near 5 knots, becoming variable. Bay waters smooth.

SATURDAY NIGHT
Variable winds near 5 knots, becoming north to northeast. Bay waters smooth.

SUNDAY
North to northeast winds near 5 knots, becoming east. Bay waters smooth.

SUNDAY NIGHT
Variable winds near 5 knots. Bay waters smooth.

---

GMZ032-035-242130
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
425 AM EST Wed Dec 24 2025

TODAY
Northeast to east winds near 15 knots. Seas 2 to 3 feet, except 2 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop.

TONIGHT
Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas around 2 feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 2 to 3 feet, subsiding to around 2 feet. Nearshore waters a moderate chop, becoming a light to moderate chop.

THURSDAY
Northeast winds 10 to 15 knots, becoming north to northeast and decreasing to 5 to 10 knots in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters a light to moderate chop, becoming smooth to a light chop.

THURSDAY NIGHT
North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop, becoming a light chop.

FRIDAY
North to northeast winds near 10 knots, decreasing to near 5 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth.

FRIDAY NIGHT
North to northeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

SATURDAY AND SATURDAY NIGHT
North to northeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

SUNDAY
Northeast winds 5 to 10 knots, becoming northeast to east. Seas 1 foot or less. Nearshore waters smooth to a light chop.

SUNDAY NIGHT
Northeast to east winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

---

GMZ042>044-242130
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
425 AM EST Wed Dec 24 2025

TODAY
Northeast to east winds near 15 knots. Seas 2 to 3 feet, except 2 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a moderate chop. Isolated showers.

TONIGHT
Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop.

THURSDAY
Northeast to east winds 10 to 15 knots, becoming decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming smooth to a light chop.

THURSDAY NIGHT
Northeast to east winds 5 to 10 knots, becoming north to northeast and increasing to near 10 knots. Seas 1 to 2 feet, except around 2 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers.

FRIDAY
North to northeast winds near 10 knots, decreasing to near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters a light chop, becoming smooth. Isolated showers.

FRIDAY NIGHT
North to northeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

SATURDAY
North to northeast winds near 5 knots, becoming northeast. Seas 1 foot or less. Nearshore waters smooth.

SATURDAY NIGHT
Northeast to east winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop.

SUNDAY NIGHT
Northeast to east winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.

---

GMZ052>055-072>075-242130
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
425 AM EST Wed Dec 24 2025

SMALL CRAFT ADVISORY IN EFFECT

TODAY
Northeast to east winds 15 to 20 knots. Seas 4 to 7 feet, occasionally to 9 feet, subsiding to 4 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast to east 7 feet at 7 seconds. Isolated showers.

TONIGHT
Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast to east 7 feet at 7 seconds.

THURSDAY
Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 6 feet at 7 seconds, becoming northeast to east 4 feet at 6 seconds.

THURSDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming north to northeast. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers.

FRIDAY
North to northeast winds near 10 knots, becoming northeast and decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Isolated showers.

FRIDAY NIGHT
Northeast winds 5 to 10 knots. Seas 1 to 2 feet.

SATURDAY THROUGH SUNDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet.

---

GMZ033-034-242130
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
425 AM EST Wed Dec 24 2025

TODAY
Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 5 feet at 5 seconds.

TONIGHT
Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 3 feet at 4 seconds.

THURSDAY
Northeast to east winds near 15 knots, becoming north to north and decreasing to near 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 4 seconds.

THURSDAY NIGHT
North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet.

FRIDAY
North to northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 1 foot.

FRIDAY NIGHT
North to northeast winds near 5 knots. Seas 1 foot or less.

SATURDAY
North to northeast winds near 5 knots, becoming northeast. Seas 1 foot or less.

SATURDAY NIGHT
Northeast winds near 5 knots. Seas 1 foot or less.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas 1 foot or less.

SUNDAY NIGHT
Northeast winds near 5 knots. Seas 1 foot or less.

---

MJV