NWS Marine Forecast


   GMZ005-212030-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  418 AM EDT Sun Jun 21 2026      .SYNOPSIS...A broad, weak high pressure is centered over the  Florida Peninsula. This will maintain a weakened pressure field  across the Florida Keys and surrounding coastal waters. As a  result, expect winds to be highly variable due to convection  developing across South Florida during the afternoon and moving  into our waters during the evening and overnight. Thereafter the  high will flux in strength, resulting in breezes periodically  entering peaks and lulls.    The Approximate Shoreward Edge of the Gulf Stream as of June 15...    28 NM South of Dry Tortugas Light...on Loggerhead Key.  12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  11 NM South of Sand Key Light...off Key West.  14 NM South of Looe Key...off Big Pine Key.  13 NM Southeast of Sombrero Key Light...off Marathon.  8 NM Southeast of Alligator Reef Light...off Islamorada.  4 NM Southeast of Molasses Reef Light...off Key Largo.  3 NM East 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.    $$
   GMZ033-034-212030-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  418 AM EDT Sun Jun 21 2026    TODAY  Southeast to south winds 5 to 10 knots, becoming  northwest to north and briefly decreasing to near 5 knots. Seas  around 1 foot. Wave Detail: Southeast 1 foot at 3 seconds and  west 1 foot at 4 seconds. A slight chance of showers and  thunderstorms.  TONIGHT  North to northeast winds 5 to 10 knots, becoming east  to southeast after midnight. Seas around 1 foot. Wave Detail:  East 1 foot at 3 seconds. A slight chance of showers and  thunderstorms.  MONDAY  East to southeast winds 5 to 10 knots. Seas around  1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. A  slight chance of showers and thunderstorms.  MONDAY NIGHT  Northeast to east winds 5 to 10 knots, becoming  east to southeast near 10 knots. Seas around 1 foot, building to 1  to 2 feet. A slight chance of showers and thunderstorms.  TUESDAY  Southeast winds 5 to 10 knots. Seas 1 to 2 feet,  subsiding to around 1 foot. A slight chance of showers and  thunderstorms.  TUESDAY NIGHT  Northeast to east winds 5 to 10 knots. Seas  subsiding to 1 foot or less. A slight chance of showers and  thunderstorms.  WEDNESDAY  East winds near 5 knots. Seas 1 foot or less. A  slight chance of showers and thunderstorms.  WEDNESDAY NIGHT  Northeast to east winds near 5 knots, becoming  east to southeast 5 to 10 knots. Seas building to around 1 foot.  A slight chance of showers and thunderstorms.  THURSDAY  East to southeast winds 5 to 10 knots. Seas around 1  foot.  THURSDAY NIGHT  East to southeast winds near 10 knots. Seas 1  to 2 feet. A slight chance of showers and thunderstorms.    $$