NWS Marine Forecast



 Hazardous marine condition(s):
 Short Term Forecast
   GMZ005-041445-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1038 PM EDT Fri Oct 3 2025      .SYNOPSIS...High pressure is slowly moving across the eastern  U.S., which will maintain a northeast wind across our waters.  This high will build into the western North Atlantic, leading to  freshening northeast to east breezes into Friday evening. Winds  will then briefly clock around towards the southeast for the  upcoming weekend and return from the east early next week. Another  period of moderate to fresh breezes is possible starting Monday  night. Expect an active weather pattern with winds and seas  expected to be higher in and around thunderstorms.    The Approximate Shoreward Edge of the Gulf Stream as of October  01...    42 NM South of Dry Tortugas Light...on Loggerhead Key.  33 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  33 NM South of Sand Key Light...off Key West.  35 NM South of Looe Key...off Big Pine Key.  16 NM Southeast of Sombrero Key Light...off Marathon.  10 NM Southeast of Alligator Reef Light...off Islamorada.  6 NM Southeast of Molasses Reef Light...off Key Largo.  5 NM Southeast of Carysfort Reef Light...off Ocean Reef.    Gulf Stream Information Courtesy of the National Weather Service in  Key West based on products from NASA SPoRT.    $$
   GMZ053>055-073>075-041445-  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 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-  1038 PM EDT Fri Oct 3 2025    OVERNIGHT  Northeast to east winds near 15 knots, becoming east  to southeast 10 to 15 knots. Seas 3 to 6 feet, occasionally to 7  feet. Wave Detail: Northeast 4 feet at 6 seconds. Scattered  showers and isolated thunderstorms.  SATURDAY  South to southwest winds near 10 knots, briefly  decreasing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet,  occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail:  Northeast 3 feet at 6 seconds. Scattered showers and isolated  thunderstorms.  SATURDAY NIGHT  South winds near 10 knots, increasing to 10 to  15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 2 feet  at 6 seconds. Scattered showers and isolated thunderstorms.  SUNDAY  South to southwest winds near 10 knots, becoming  southeast 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2  feet. Scattered showers and isolated thunderstorms.  SUNDAY NIGHT  Southeast winds increasing to near 10 knots. Seas  building to around 2 feet. Scattered showers and isolated  thunderstorms.  MONDAY  East winds near 10 knots. Seas around 2 feet. Scattered  showers and isolated thunderstorms.  MONDAY NIGHT  Northeast to east winds 10 to 15 knots. Seas 2 to  3 feet. Scattered showers and isolated thunderstorms.  TUESDAY  Northeast to east winds increasing to near 15 knots.  Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.  TUESDAY NIGHT  Northeast to east winds 15 to 20 knots. Seas  building to 3 to 5 feet, occasionally to 6 feet. Scattered  showers and isolated thunderstorms.  WEDNESDAY  Northeast to east winds 15 to 20 knots. Seas 4 to  6 feet, occasionally to 8 feet. Scattered showers and isolated  thunderstorms.  WEDNESDAY NIGHT  Northeast to east winds 15 to 20 knots. Seas  4 to 6 feet, occasionally to 8 feet. Scattered showers and  isolated thunderstorms.    $$