NWS Marine Forecast



 Hazardous marine condition(s):
 Short Term Forecast
   GMZ005-172030-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  417 AM EDT Fri Oct 17 2025      .SYNOPSIS...A high pressure system moving towards the southeastern  CONUS form the Great Lakes will support breezes freshening to  moderate to fresh today and tonight. Small Craft Advisories may  be required as breezes are expected to be just below the  threshold. Shower coverage will rise today as the wind surge moves  south across the Florida Keys coastal waters. Environmental  conditions will become more supportive of showers and  thunderstorms on Sunday and Monday.    The Approximate Shoreward Edge of the Gulf Stream as of  October 15...    63 NM South of Dry Tortugas Light...on Loggerhead Key.  42 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  33 NM South of Sand Key Light...off Key West.  23 NM South of Looe Key...off Big Pine Key.  16 NM Southeast of Sombrero Key Light...off Marathon.  22 NM Southeast of Alligator Reef Light...off Islamorada.  20 NM Southeast of Molasses Reef Light...off Key Largo.  18 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.    $$
   GMZ031-172030-  Florida Bay including Barnes Sound, Blackwater Sound, and  Buttonwood Sound-  417 AM EDT Fri Oct 17 2025    SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS    TODAY  Northeast to east winds near 15 knots, increasing to 15  to 20 knots. Bay waters a moderate chop, becoming choppy.  Isolated showers.  TONIGHT AND SATURDAY  Northeast to east winds 15 to 20 knots.  Bay waters choppy.  SATURDAY NIGHT  East winds near 15 knots. Bay waters a moderate  chop. Isolated showers.  SUNDAY  East winds 10 to 15 knots. Bay waters a light to  moderate chop. Isolated showers and thunderstorms.  SUNDAY NIGHT  East winds 10 to 15 knots. Bay waters a light to  moderate chop. Scattered showers and isolated thunderstorms.  MONDAY  East winds 10 to 15 knots, increasing to near 15 knots.  Bay waters a light to moderate chop, becoming a moderate chop.  Isolated showers and thunderstorms.  MONDAY NIGHT  Northeast to east winds near 15 knots. Bay waters  a moderate chop. Isolated showers and thunderstorms.  TUESDAY AND TUESDAY NIGHT  Northeast to east winds 10 to 15  knots. Bay waters a light to moderate chop. Isolated showers.    $$