


Coastal Waters Forecast
Issued by NWS Key West, FL
Issued by NWS Key West, FL
224 FZUS52 KKEY 050819 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 419 AM EDT Sun Oct 5 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. GMZ005-052030- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 419 AM EDT Sun Oct 5 2025 .SYNOPSIS...A combination of a stationary frontal boundary and a weak area of low pressure situated near the Bahamas will make for a messy weather pattern through the next several days. This will maintain above normal rain chances through the entire forecast period. In addition, it will keeps winds fluctuating between northeast and southeast at times. At this time, the strongest breezes look to stay north of our waters but will bear watching for updates. The Approximate Shoreward Edge of the Gulf Stream as of October 01... 42 NM South of Dry Tortugas Light...on Loggerhead Key. 33 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 33 NM South of Sand Key Light...off Key West. 35 NM South of Looe Key...off Big Pine Key. 16 NM Southeast of Sombrero Key Light...off Marathon. 10 NM Southeast of Alligator Reef Light...off Islamorada. 6 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. $$ GMZ031-052030- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 419 AM EDT Sun Oct 5 2025 .TODAY...Northeast to east winds near 10 knots early, decreasing to 5 to 10 knots. Bay waters a light chop, becoming smooth to a light chop. Scattered showers and isolated thunderstorms. .TONIGHT...Northeast to east winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and isolated thunderstorms. .MONDAY...Northeast winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and isolated thunderstorms. .MONDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming east to southeast near 10 knots. Bay waters smooth to a light chop, becoming a light chop. Scattered showers and isolated thunderstorms. .TUESDAY...East to southeast winds near 10 knots. Bay waters a light chop. Numerous showers and isolated thunderstorms. .TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms. .WEDNESDAY...East winds decreasing to near 10 knots. Bay waters becoming a light chop. Scattered showers and isolated thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms. .THURSDAY...East winds increasing to near 15 knots. Bay waters becoming a moderate chop. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...Northeast to east winds decreasing to 10 to 15 knots. Bay waters becoming a light to moderate chop. Scattered showers and isolated thunderstorms. $$ GMZ032-035-052030- 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- 419 AM EDT Sun Oct 5 2025 .TODAY...Northeast to east winds near 10 knots early, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot or less. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers and isolated thunderstorms. .TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .MONDAY...Northeast winds 5 to 10 knots, briefly decreasing to near 5 knots in the afternoon. Seas 1 foot or less. Nearshore waters becoming smooth to a light chop, becoming smooth. Scattered showers and isolated thunderstorms. .MONDAY NIGHT...Northeast winds 5 to 10 knots, becoming east near 10 knots. Seas building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated thunderstorms. .TUESDAY...East winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Numerous showers and isolated thunderstorms. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. .WEDNESDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. .THURSDAY...East winds 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. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...East winds decreasing to 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. Scattered showers and isolated thunderstorms. $$ GMZ042>044-052030- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 419 AM EDT Sun Oct 5 2025 .TODAY...Northeast to east winds near 10 knots early, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .TONIGHT...Northeast to east winds 5 to 10 knots. Seas subsiding to around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .MONDAY...Northeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .MONDAY NIGHT...Northeast winds 5 to 10 knots, becoming east to southeast near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated thunderstorms. .TUESDAY...East winds near 10 knots. Seas building to 1 to 2 feet. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. .TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. .WEDNESDAY...Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. .THURSDAY...East winds increasing to near 15 knots. Seas building to 2 to 3 feet. Nearshore waters becoming a moderate chop. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas around 2 feet. Nearshore waters becoming a light to moderate chop. Scattered showers and isolated thunderstorms. $$ GMZ052>055-072>075-052030- 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- 419 AM EDT Sun Oct 5 2025 .TODAY...Northeast to east winds near 10 knots early, decreasing to 5 to 10 knots. Seas 2 to 4 feet, subsiding to 1 to 3 feet due to a northerly swell. Wave Detail: Northeast to east 2 feet at 5 seconds. Scattered showers and isolated thunderstorms. .TONIGHT...Northeast to east winds 5 to 10 knots, becoming east to southeast. Seas 1 to 3 feet due to a northerly swell, subsiding to 1 to 2 feet. Wave Detail: Northeast 2 feet at 5 seconds. Scattered showers and isolated thunderstorms. .MONDAY...East to southeast winds near 5 knots, becoming north to northeast 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: Northeast to east 1 foot at 5 seconds. Scattered showers and isolated thunderstorms. .MONDAY NIGHT...North to northeast winds 5 to 10 knots, becoming east to southeast. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms. .TUESDAY...East to southeast winds 5 to 10 knots, becoming northeast to east near 10 knots. Seas building to 1 to 3 feet. Scattered showers and isolated thunderstorms. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas building to 2 to 4 feet. Scattered showers and isolated thunderstorms. .WEDNESDAY...Northeast to east winds near 10 knots. Seas subsiding to 2 to 3 feet. Scattered showers and isolated thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. $$ GMZ033-034-052030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 419 AM EDT Sun Oct 5 2025 .TODAY...East winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Wave Detail: East to southeast 2 feet at 4 seconds. Scattered showers and isolated thunderstorms. .TONIGHT...Northeast to east winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. Wave Detail: Northeast to east 1 foot at 3 seconds. Scattered showers and isolated thunderstorms. .MONDAY...Northeast to east winds 5 to 10 knots, becoming north. Seas around 1 foot. Wave Detail: Northeast to east 1 foot at 3 seconds. Scattered showers and isolated thunderstorms. .MONDAY NIGHT...North to northeast winds 5 to 10 knots, becoming east near 10 knots. Seas building to 1 to 2 feet. Scattered showers and isolated thunderstorms. .TUESDAY...East winds near 10 knots. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet. Scattered showers and isolated thunderstorms. .WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas around 2 feet. Numerous showers and isolated thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds increasing to near 15 knots. Seas building to 2 to 3 feet. Scattered showers and isolated thunderstorms. .THURSDAY...Northeast to east winds near 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. $$