NWS Marine Forecast



 Hazardous marine condition(s):
 Short Term Forecast
   GMZ005-032030-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  430 AM EDT Wed Sep 3 2025      .SYNOPSIS...A broad surface low along a stationary front  stretching from the Gulf eastward to the Florida Peninsula will  maintain west to northwest winds across the Keys marine zones  tonight. The front will remain rooted in place through the next  few days, while the low meanders northeast into the western North  Atlantic promoting southwest to west breezes throughout the week.  Abundant moisture will promote above normal rain and thunder  chances through the end of the work week.    The Approximate Shoreward Edge of the Gulf Stream as of September 1...    41 NM South of Dry Tortugas Light...on Loggerhead Key.  30 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  9 NM South of Sand Key Light...off Key West.  8 NM South of Looe Key...off Big Pine Key.  7 NM Southeast of Sombrero Key Light...off Marathon.  6 NM Southeast of Alligator Reef Light...off Islamorada.  4 NM Southeast of Molasses Reef Light...off Key Largo.  4 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.    $$
   GMZ033-034-032030-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  430 AM EDT Wed Sep 3 2025    TODAY  West winds near 10 knots. Seas 1 to 2 feet. Wave Detail:  West 1 foot at 4 seconds. Winds and seas higher in numerous  showers and scattered thunderstorms.  TONIGHT  Southwest to west winds near 10 knots. Seas 1 to  2 feet. Wave Detail: Southwest 2 feet at 4 seconds. Widespread  showers and scattered thunderstorms.  THURSDAY  West winds 10 to 15 knots. Seas 1 to 3 feet. Wave  Detail: Southwest to west 2 feet at 4 seconds. Widespread showers  and scattered thunderstorms.  THURSDAY NIGHT  Southwest to west winds 10 to 15 knots. Seas  1 to 3 feet. Numerous showers and scattered thunderstorms.  FRIDAY  Southwest to west winds decreasing to near 10 knots.  Seas around 2 feet. Numerous showers and scattered thunderstorms.  FRIDAY NIGHT  Southwest winds near 10 knots. Seas 1 to 2 feet.  Numerous showers and scattered thunderstorms.  SATURDAY  Southwest to west winds 5 to 10 knots. Seas around 1  foot. Numerous showers and scattered thunderstorms.  SATURDAY NIGHT  Northwest winds near 5 knots, becoming variable.  Seas around 1 foot. Scattered showers and thunderstorms.  SUNDAY  East winds near 5 knots. Seas 1 foot or less. Scattered  showers and thunderstorms.  SUNDAY NIGHT  Northeast to east winds 5 to 10 knots. Seas around  1 foot. Scattered showers and thunderstorms.    $$