NWS Marine Forecast


   GMZ005-080330-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1029 AM EST Sun Dec 7 2025      .SYNOPSIS...The Florida Keys will remain in a col region through  this afternoon. This will promote mainly light to gentle  southeast breezes, occasionally becoming variable. Thereafter, a  weather system will move out of the ArkLaTex region and into the  Southeast U.S. by this evening. The attendent cold front will  sweep through Monday night with a brief period of moderate to  fresh breezes. The potential exists for a more active weather  pattern as the front stalls out across the Straits of Florida for  most of the week.    The Approximate Shoreward Edge of the Gulf Stream as of December 4...    21 NM South of Dry Tortugas Light...on Loggerhead Key.  21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  22 NM South of Sand Key Light...off Key West.  15 NM South of Looe Key...off Big Pine Key.  8 NM Southeast of Sombrero Key Light...off Marathon.  6 NM Southeast of Alligator Reef Light...off Islamorada.  3 NM Southeast of Molasses Reef Light...off Key Largo.  1 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.    $$
   GMZ031-080330-  Florida Bay including Barnes Sound, Blackwater Sound, and  Buttonwood Sound-  1029 AM EST Sun Dec 7 2025    THIS AFTERNOON  Southeast to south winds 5 to 10 knots. Bay  waters smooth to a light chop. Isolated showers.  TONIGHT  South to southwest winds 5 to 10 knots, becoming  southwest to west near 10 knots. Bay waters smooth to a light chop,  becoming a light chop. Scattered showers and isolated  thunderstorms.  MONDAY  Southwest to west winds 10 to 15 knots, becoming west  near 15 knots. Bay waters a light to moderate chop, becoming a  moderate chop. Scattered showers and isolated thunderstorms.  MONDAY NIGHT  West to northwest winds 10 to 15 knots, becoming  north to northeast. Bay waters a light to moderate chop.  Scattered showers.  TUESDAY  North to northeast winds near 15 knots, decreasing to  10 to 15 knots. Bay waters a moderate chop, becoming a light to  moderate chop. Scattered showers.  TUESDAY NIGHT  Northeast winds 10 to 15 knots, decreasing to  near 10 knots. Bay waters a light to moderate chop, becoming a  light chop. Scattered showers.  WEDNESDAY  Northeast to east winds near 10 knots, becoming west  to northwest 5 to 10 knots. Bay waters a light chop, becoming smooth  to a light chop. Isolated showers.  WEDNESDAY NIGHT  Northwest to north winds increasing to near 10  knots. Bay waters becoming a light chop. Isolated showers.  THURSDAY  North to northeast winds near 10 knots, decreasing to  5 to 10 knots. Bay waters a light chop, becoming smooth to a light  chop. Isolated showers.  THURSDAY NIGHT  Northeast to east winds 5 to 10 knots. Bay  waters smooth to a light chop. Isolated showers.    $$