NWS Marine Forecast


   GMZ005-030930-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  458 PM EST Tue Dec 2 2025      .SYNOPSIS...A developing low pressure system extends from the  Carolinas to the Florida Panhandle. A corresponding cold front is  expected to press through the Keys late overnight into Wednesday  morning. In the wake, breezes will freshen out of the north to  northeast Wednesday. Another surface high builds back in following  the front with gentle broadly southern breezes returning in time  for the weekend. There is the potential for another frontal  passage Sunday afternoon and evening.    The Approximate Shoreward Edge of the Gulf Stream as of November  28...    28 NM South of Dry Tortugas Light...on Loggerhead Key.  20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  17 NM South of Sand Key Light...off Key West.  15 NM South of Looe Key...off Big Pine Key.  15 NM Southeast of Sombrero Key Light...off Marathon.  10 NM Southeast of Alligator Reef Light...off Islamorada.  9 NM Southeast of Molasses Reef Light...off Key Largo.  8 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.    $$
   GMZ042>044-030930-  Hawk Channel from Ocean Reef to Craig Key out to the reef-  Hawk Channel from Craig Key to west end of Seven Mile Bridge out  to the reef-  Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal  out to the reef-  458 PM EST Tue Dec 2 2025    TONIGHT  Southwest winds 10 to 15 knots early, becoming  southwest to west near 10 knots in the evening, then becoming west  to northwest 5 to 10 knots after midnight. Seas around 2 feet,  subsiding to around 1 foot. Nearshore waters a light to moderate  chop, becoming smooth to a light chop. Isolated showers.  WEDNESDAY  North winds 5 to 10 knots. Seas around 1 foot, except  building to 1 to 2 feet west of Cosgrove Shoal Light. Nearshore  waters smooth to a light chop. Patchy fog in the morning.  WEDNESDAY NIGHT  North to northeast winds near 10 knots,  increasing to 10 to 15 knots. Seas 1 to 2 feet, except building to  2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a  light chop, becoming a light to moderate chop.  THURSDAY  Northeast to east winds 10 to 15 knots. Seas 1 to  2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, subsiding  to around 2 feet. Nearshore waters a light to moderate chop.  THURSDAY NIGHT  Northeast to east winds 10 to 15 knots. Seas  around 2 feet. Nearshore waters a light to moderate chop.  FRIDAY  East to southeast winds 10 to 15 knots, decreasing to  near 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a  light to moderate chop, becoming a light chop.  FRIDAY NIGHT  Southeast winds near 10 knots. Seas 1 to 2 feet.  Nearshore waters a light chop. Isolated showers.  SATURDAY  Southeast to south winds near 10 knots. Seas 1 to 2  feet. Nearshore waters a light chop. Isolated showers.  SATURDAY NIGHT  Southeast winds near 10 knots, becoming south  10 to 15 knots. Seas 1 to 2 feet, building to around 2 feet.  Nearshore waters a light chop, becoming a light to moderate chop.  Isolated showers.  SUNDAY  Southwest winds 10 to 15 knots. Seas 2 to 3 feet.  Nearshore waters a light to moderate chop. Scattered showers.  SUNDAY NIGHT  West to northwest winds 10 to 15 knots. Seas 1 to  2 feet, except 2 to 3 feet west of Cosgrove Shoal Light.  Nearshore waters a light to moderate chop. Scattered showers.    $$