NWS Marine Forecast


   GMZ005-170830-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  429 PM EDT Sun Aug 16 2026      .SYNOPSIS...Generally gentle east to southeast breezes will become  light and variable at times across the local waters over the next  few days as ridging remains the dominant weather feature across  the area. Northward movement of the subtropical ridge away from  the Keys will allow a col region to set up between Florida and  Cuba. Shower coverage will be kept far below normal because of a  Saharan Air Layer moving over the Keys waters.    The Approximate Shoreward Edge of the Gulf Stream as of  August 13, 2026...    38 NM South of Dry Tortugas Light...on Loggerhead Key.  20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  17 NM South of Sand Key Light...off Key West.  21 NM South of Looe Key...off Big Pine Key.  18 NM Southeast of Sombrero Key Light...off Marathon.  7 NM Southeast of Alligator Reef Light...off Islamorada.  7 NM Southeast of Molasses Reef Light...off Key Largo.  2 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.    $$
   GMZ033-034-170830-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  429 PM EDT Sun Aug 16 2026    TONIGHT  East winds near 10 knots early, decreasing to 5 to 10  knots. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds.  MONDAY  East winds 5 to 10 knots, becoming north to northeast.  Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds.  MONDAY NIGHT  North to northeast winds near 5 knots. Seas  1 foot or less.  TUESDAY  North winds near 5 knots, becoming northwest to north.  Seas 1 foot or less.  TUESDAY NIGHT  Northwest winds 5 to 10 knots, decreasing to near  5 knots. Seas around 1 foot.  WEDNESDAY  West to northwest winds near 5 knots. Seas around  1 foot. A slight chance of showers and thunderstorms.  WEDNESDAY NIGHT  West to northwest winds 5 to 10 knots. Seas  around 1 foot. A slight chance of showers and thunderstorms.  THURSDAY  West winds near 5 knots. Seas around 1 foot. A slight  chance of showers.  THURSDAY NIGHT  West to northwest winds near 5 knots, becoming  variable. Seas around 1 foot. A slight chance of showers and  thunderstorms.  FRIDAY  Variable winds near 5 knots, becoming east to southeast.  Seas around 1 foot. A slight chance of showers.  FRIDAY NIGHT  East to southeast winds near 5 knots. Seas around  1 foot. A slight chance of showers and thunderstorms.    $$