NWS Marine Forecast


   GMZ005-161430-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1023 PM EDT Tue Jul 15 2025      .SYNOPSIS...As a weak low pressure shifts off to the west and  into the Gulf, high pressure will build in behind it strengthening  the pressure gradient. This will lead to gentle to moderate  breezes tonight. High pressure remains anchored over the central  Atlantic with its western periphery extending into the Keys  through the weekend with gentle to moderate east to southeast  breezes continuing, occasionally becoming moderate to fresh.    The Approximate Shoreward Edge of the Gulf Stream as of July 15...    18 NM South of Dry Tortugas Light...on Loggerhead Key.  3 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  1 NM South of Sand Key Light...off Key West.  4 NM South of Looe Key...off Big Pine Key.  4 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.  3 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.    $$
   GMZ052>055-072>075-161430-  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-  1023 PM EDT Tue Jul 15 2025    OVERNIGHT  Southeast winds 5 to 10 knots, increasing to 10 to  15 knots. Seas building to 2 to 3 feet. Wave Detail: East to  southeast 1 foot at 3 seconds, becoming east to southeast 2 feet  at 3 seconds. Numerous showers and scattered thunderstorms.  WEDNESDAY  Southeast winds 10 to 15 knots, becoming east to  southeast and decreasing to near 10 knots. Seas 2 to 3 feet. Wave  Detail: East to southeast 2 feet at 4 seconds. Numerous showers  and scattered thunderstorms.  WEDNESDAY NIGHT  East to southeast winds 10 to 15 knots. Seas  2 to 4 feet, occasionally to 5 feet. Wave Detail: East to  southeast 4 feet at 5 seconds. Scattered showers and isolated  thunderstorms.  THURSDAY  East to southeast winds 15 to 20 knots, decreasing to  near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet.  Scattered showers and isolated thunderstorms.  THURSDAY NIGHT  East winds 15 to 20 knots, becoming east to  southeast. Seas 3 to 5 feet, occasionally to 6 feet. Scattered  showers and isolated thunderstorms.  FRIDAY  East to southeast winds 15 to 20 knots, decreasing to  near 15 knots. Seas 4 to 5 feet, occasionally to 6 feet.  Scattered showers and isolated thunderstorms.  FRIDAY NIGHT  East winds 10 to 15 knots. Seas 3 to 4 feet,  occasionally to 5 feet. Scattered showers and isolated  thunderstorms.  SATURDAY  East winds 10 to 15 knots. Seas 2 to 4 feet,  occasionally to 5 feet. Isolated showers and thunderstorms.  SATURDAY NIGHT  East winds 10 to 15 knots. Seas 2 to 4 feet,  occasionally to 5 feet. Scattered showers and isolated  thunderstorms.  SUNDAY  East winds near 10 knots. Seas 2 to 3 feet. Scattered  showers and isolated thunderstorms.  SUNDAY NIGHT  East winds 5 to 10 knots. Seas 2 to 3 feet.  Scattered showers and isolated thunderstorms.    $$