FZUS52 KKEY 222029 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 429 PM EDT Sat Aug 22 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. GMZ005-230830- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 429 PM EDT Sat Aug 22 2026 .SYNOPSIS... A split ridge pattern remains in place across the Florida Keys coastal waters. This will promote generally light to gentle southeast to east breezes through Sunday, becoming variable at times during the afternoon hours. While North Atlantic ridging builds westward, southeasterly to easterly breezes will become more established for Sunday night through the middle of next week, becoming gentle and at times moderate during the overnight hours. The Approximate Shoreward Edge of the Gulf Stream as of August 19, 2026... 37 NM south of Dry Tortugas Light, on Loggerhead Key 20 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys 14 NM south-southeast of Sand Key Light, off Key West 10 NM south-southeast of Looe Key, off Big Pine Key 10 NM south-southeast of Sombrero Key Light, off Marathon 3 NM southeast of Alligator Reef Light, off Islamorada 1 NM west-northwest of Molasses Reef Light, off Key Largo 1 NM east-southeast of Carysfort Reef Light, off Ocean Reef Gulf Stream Information Courtesy of the Naval Oceanographic Office. $$ GMZ031-230830- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 429 PM EDT Sat Aug 22 2026 .TONIGHT...Southeast winds near 5 knots, increasing to 5 to 10 knots. Bay waters smooth, becoming smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY...Southeast to south winds 5 to 10 knots. Bay waters smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY...East winds near 5 knots, increasing to east to southeast in the afternoon. Bay waters smooth, becoming a light chop. A slight chance of showers and thunderstorms. .MONDAY NIGHT...East winds near 10 knots. Bay waters a light chop. A chance of showers and thunderstorms. .TUESDAY...East winds 5 to 10 knots. Bay waters smooth to a light chop. A chance of showers and thunderstorms. .TUESDAY NIGHT...East winds near 10 knots. Bay waters a light chop. A chance of showers and thunderstorms. .WEDNESDAY...East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. A chance of showers and thunderstorms. .WEDNESDAY NIGHT...East winds near 10 knots. Bay waters a light chop. A chance of showers and thunderstorms. .THURSDAY AND THURSDAY NIGHT...East to southeast winds near 10 knots. Bay waters a light chop. A chance of showers and thunderstorms. $$ GMZ032-035-230830- 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- 429 PM EDT Sat Aug 22 2026 .TONIGHT...Southeast winds near 5 knots, becoming east to southeast and increasing to 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY...Southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY NIGHT...East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. A chance of showers and thunderstorms. .TUESDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .TUESDAY NIGHT...East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. A chance of showers and thunderstorms. .WEDNESDAY...East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A chance of showers and thunderstorms. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A chance of showers and thunderstorms. $$ GMZ042>044-230830- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 429 PM EDT Sat Aug 22 2026 .TONIGHT...East to southeast winds near 5 knots, increasing to 5 to 10 knots, becoming southeast late. Seas around 1 foot. Nearshore waters smooth, becoming smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY...East to southeast winds near 5 knots. Seas around 1 foot. Nearshore waters smooth. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY...East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. A chance of showers and thunderstorms. .TUESDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. A slight chance of showers and thunderstorms. .TUESDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. A chance of showers and thunderstorms. .WEDNESDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A chance of showers and thunderstorms. $$ GMZ052>055-072>075-230830- 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- 429 PM EDT Sat Aug 22 2026 .TONIGHT...East winds 5 to 10 knots, becoming southeast after midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at 4 seconds. A slight chance of showers and thunderstorms. .SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: East to southeast 1 foot at 3 seconds. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. .MONDAY...East winds near 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. .MONDAY NIGHT...East winds near 10 knots. Seas around 2 feet. A chance of showers and thunderstorms. .TUESDAY...East winds near 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. .WEDNESDAY...East winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. .THURSDAY AND THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and t-storms. $$ GMZ033-034-230830- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 429 PM EDT Sat Aug 22 2026 .TONIGHT...Variable winds near 5 knots, becoming southeast. Seas 1 foot or less. A slight chance of showers and thunderstorms. .SUNDAY...Southeast winds near 5 knots, becoming variable. Seas 1 foot or less. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: East to southeast 1 foot at 2 seconds. A chance of showers and thunderstorms. .MONDAY...East to southeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. .MONDAY NIGHT...East to southeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. .TUESDAY...East winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. .WEDNESDAY...East to southeast winds 5 to 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. .WEDNESDAY NIGHT...East to southeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. .THURSDAY...East to southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. .THURSDAY NIGHT...East to southeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. $$