NWS Marine Forecast


   GMZ005-112030-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  420 AM EDT Tue Aug 11 2026      .SYNOPSIS...Ridging across Central Florida will shift southwards  into Central and South Florida and weaken over the next couple of  days. Gentle to moderate breezes will trend downwards to a light  breeze through this period, with some directional variability  creeping in. Winds are expected to freshen late in the week as  the ridge lifts back into northern Florida and a broad lower level  trough moves westward across our area. Expect shower and  thunderstorm chances to tick up at that time.    The Approximate Shoreward Edge of the Gulf Stream as of  August 7, 2026...    25 NM South of Dry Tortugas Light...on Loggerhead Key.  15 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  19 NM South of Sand Key Light...off Key West.  29 NM South of Looe Key...off Big Pine Key.  16 NM Southeast of Sombrero Key Light...off Marathon.  4 NM Southeast of Alligator Reef Light...off Islamorada.  2 NM Southeast of Molasses Reef Light...off Key Largo.  1 NM Southeast of Carysfort Reef Light...off Ocean Reef.    Gulf Stream Information Courtesy of the National Weather Service in  Key West, using data from RTOFS and NASA SPoRT SST.    $$
   GMZ033-034-112030-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  420 AM EDT Tue Aug 11 2026    TODAY  East to southeast winds 10 to 15 knots, becoming east  5 to 10 knots this afternoon. Seas 2 to 3 feet, subsiding to 1 to  2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. A  slight chance of showers and thunderstorms.  TONIGHT  East winds 5 to 10 knots. Seas subsiding to 1 to 2  feet. Wave Detail: East 1 foot at 3 seconds. A slight chance of  showers and thunderstorms.  WEDNESDAY  East winds 5 to 10 knots, becoming northeast in the  afternoon. Seas 1 to 2 feet. Wave Detail: East 1 foot at  3 seconds. A slight chance of showers and thunderstorms.  WEDNESDAY NIGHT  Northeast winds near 5 knots. Seas 1 foot or  less. A slight chance of showers and thunderstorms.  THURSDAY  Northeast to east winds near 5 knots. Seas 1 foot or  less. A chance of showers with a slight chance of thunderstorms.  THURSDAY NIGHT  Northeast winds 5 to 10 knots, becoming east.  Seas building to 1 to 2 feet. A slight chance of showers and  thunderstorms.  FRIDAY  East winds 5 to 10 knots. Seas 1 to 2 feet. A chance of  showers and thunderstorms.  FRIDAY NIGHT  East winds increasing to 10 to 15 knots. Seas 1  to 2 feet. A chance of showers and thunderstorms.  SATURDAY  East to southeast winds near 10 knots. Seas 1 to 2  feet. A slight chance of showers and thunderstorms.  SATURDAY NIGHT  East winds 10 to 15 knots. Seas 1 to 2 feet. A  slight chance of showers and thunderstorms.    $$