FZUS52 KKEY 151422 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 1022 AM EDT Thu Oct 15 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. The Wave Detail section highlights the period and direction of origin for the highest-energy waves, as well as any long-period swells moving in a different direction than the wind. GMZ005-160230- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1022 AM EDT Thu Oct 15 2026 .SYNOPSIS... High pressure centered just off the Southeast coastline will interact with a weak surface trough that remains across the area. This will promote gentle to moderate easterly breezes over the for at least the next 24 hours. Late week, a second, much stronger front, is expected to drive southeastward through the Gulf towards the Florida Keys over the weekend before stalling. Fresh to strong breezes, along with squally conditions, will be possible for the latter part of the weekend. A Small Craft Advisory likely will be required for portions or all of the Florida Keys marine zones by Sunday. The Approximate Shoreward Edge of the Gulf Stream as of October 9, 2026... 53 NM south-southeast of Dry Tortugas Light, on Loggerhead Key 33 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys 24 NM south-southeast of Sand Key Light, off Key West 19 NM south-southeast of Looe Key, off Big Pine Key 13 NM south-southeast of Sombrero Key Light, off Marathon 5 NM south-southeast of Alligator Reef Light, off Islamorada 2 NM east of Molasses Reef Light, off Key Largo 2 NM east of Carysfort Reef Light, off Ocean Reef Gulf Stream Information Courtesy of the Naval Oceanographic Office. $$ GMZ031-160230- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 1022 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...East winds 10 to 15 knots. Bay waters a light to moderate chop. A slight chance of showers and thunderstorms. .TONIGHT...East winds 10 to 15 knots. Bay waters a light to moderate chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds near 10 knots. Bay waters a light chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY NIGHT...East winds 5 to 10 knots, becoming north to northeast and decreasing to near 5 knots after midnight. Bay waters smooth to a light chop, becoming smooth. A chance of showers with a slight chance of thunderstorms. .SATURDAY...North winds near 5 knots, increasing to near 10 knots in the afternoon. Bay waters smooth, becoming a light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...North to northeast winds 10 to 15 knots, becoming northeast and increasing to 15 to 20 knots after midnight. Bay waters a light to moderate chop, becoming choppy. Showers with a chance of thunderstorms. .SUNDAY...Northeast to east winds near 20 knots, increasing to 20 to 25 knots. Bay waters rough, becoming very rough. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Northeast to east winds 20 to 25 knots, decreasing to 15 to 20 knots after midnight. Bay waters very rough, becoming choppy. A chance of thunderstorms. Showers likely. .MONDAY...Northeast to east winds 15 to 20 knots, increasing to near 20 knots. Bay waters choppy, becoming rough. A chance of thunderstorms. Showers likely. .MONDAY NIGHT...Northeast to east winds 20 to 25 knots, becoming northeast and decreasing to near 15 knots after midnight. Bay waters very rough, becoming a moderate chop. A chance of showers and thunderstorms. $$ GMZ032-035-160230- 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- 1022 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...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 slight chance of showers and thunderstorms. .TONIGHT...East winds near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a moderate chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds 10 to 15 knots, becoming east and decreasing to near 10 knots. Seas around 1 foot, except subsiding to 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a light chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY NIGHT...Northeast to east winds 5 to 10 knots, decreasing to near 5 knots. Seas subsiding to 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Northeast winds near 5 knots, becoming north and increasing to 10 to 15 knots in the afternoon. Seas 1 foot or less, building to around 1 foot, except building to 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth, becoming a light to moderate chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...North to northeast winds near 15 knots, increasing to near 20 knots. Seas 1 to 2 feet, building to 2 to 3 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet. Nearshore waters a moderate chop, becoming rough. Showers with a chance of thunderstorms. .SUNDAY...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. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally to 7 feet west of the Marquesas Keys. Nearshore waters very rough. Showers likely with a chance of thunderstorms. .MONDAY...Northeast to east winds 20 to 25 knots, decreasing to 15 to 20 knots in the afternoon. 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, becoming choppy. A chance of thunderstorms. Showers likely. .MONDAY NIGHT...Northeast to east winds near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally to 7 feet west of the Marquesas Keys. Nearshore waters rough. A chance of showers and thunderstorms. $$ GMZ042>044-160230- 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- 1022 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. A slight chance of showers and thunderstorms. .TONIGHT...East winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds 10 to 15 knots, becoming east and decreasing to near 10 knots. Seas around 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. A chance of showers with a slight chance of thunderstorms. .FRIDAY NIGHT...Northeast to east winds 5 to 10 knots, decreasing to near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters smooth to a light chop, becoming smooth. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Northeast winds near 5 knots, becoming north to northeast and increasing to near 10 knots in the afternoon. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters smooth, becoming a light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...North to northeast winds 10 to 15 knots, becoming northeast and increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2 to 3 feet, except building to 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, becoming choppy. Showers with a chance of thunderstorms. .SUNDAY...Northeast to east winds near 20 knots, increasing to 20 to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters rough, becoming very rough. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally to 7 feet west of Cosgrove Shoal Light. Nearshore waters very rough. Showers with a chance of thunderstorms. .MONDAY...Northeast to east winds 20 to 25 knots, decreasing to 15 to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, except 3 to 5 feet, occasionally to 7 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming choppy. A chance of thunderstorms. Showers likely. .MONDAY 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 7 feet west of Cosgrove Shoal Light. Nearshore waters very rough. Showers likely with a chance of thunderstorms. $$ GMZ052>055-072>075-160230- 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- 1022 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail East 4 feet at 5 seconds. A slight chance of showers and thunderstorms. .TONIGHT...East winds 15 to 20 knots, becoming east to southeast and decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY NIGHT...Northeast to east winds near 10 knots, decreasing to near 5 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Northeast to east winds near 5 knots, becoming northeast and increasing to 10 to 15 knots in the afternoon. Seas 1 to 2 feet, building to around 2 feet. A chance of showers and thunderstorms. .SATURDAY NIGHT...Northeast winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 7 feet. Showers with a chance of thunderstorms. .SUNDAY...Northeast to east winds near 20 knots. Seas 4 to 7 feet, occasionally to 8 feet. Showerswith a chance of thunderstorms. .SUNDAY NIGHT...Northeast to east winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Showers with a chance of thunderstorms. .MONDAY...Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A chance of thunderstorms. Showers likely. .MONDAY NIGHT...Northeast to east winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of thunderstorms. Showers likely. $$ GMZ033-034-160230- 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- 1022 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds. A slight chance of showers and thunderstorms. .TONIGHT...East winds near 15 knots. Seas around 3 feet. Wave Detail: East 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds 10 to 15 knots, becoming northeast to east and decreasing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY NIGHT...Northeast winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot, subsiding to 1 foot or less. Showers likely with a slight chance of thunderstorms. .SATURDAY...Northeast to east winds near 5 knots, becoming north to northeast and increasing to near 15 knots in the afternoon. Seas 1 foot or less, building to 1 to 2 feet. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...North to northeast winds 15 to 20 knots, becoming northeast and increasing to 20 to 25 knots. Seas 2 to 3 feet, building to 4 to 6 feet, occasionally to 8 feet. Showers with a chance of thunderstorms. .SUNDAY...Northeast to east winds near 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Northeast to east winds near 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. A chance of thunderstorms. Showers likely. .MONDAY...Northeast to east winds 20 to 25 knots, decreasing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Showers likely with a chance of thunderstorms. .MONDAY NIGHT...Northeast to east winds increasing to 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers and thunderstorms. $$