NWS Marine Forecast


   GMZ005-180230-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1022 AM EDT Fri Jul 17 2026      .SYNOPSIS...  A weak surface trough near the northeastern Gulf and northern  Florida will maintain a split ridge pattern across Florida for the  next several days. The Keys will either be within a col region  south of the broad surface trough, or within the southern quadrant  of the trough. Thus, breezes across the Florida Keys will be  variable at times, or take on a southerly component. Our forecast  takes the middle ground and is an average of the two scenarios.    The Approximate Shoreward Edge of the Gulf Stream as of  July 12...    63 NM South of Dry Tortugas Light...on Loggerhead Key.  38 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  21 NM South of Sand Key Light...off Key West.  13 NM South of Looe Key...off Big Pine Key.  12 NM South of Sombrero Key Light...off Marathon.  7 NM Southeast of Alligator Reef Light...off Islamorada.  3 NM Southeast of Molasses Reef Light...off Key Largo.  2 NM Southeast of Carysfort Reef Light...off Ocean Reef.    Gulf Stream Information Courtesy of the National Weather Service in  Key West, using data from RTOFS and NASA SPoRT SST.    $$
   GMZ033-034-180230-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  1022 AM EDT Fri Jul 17 2026    THIS AFTERNOON  Variable winds near 5 knots, becoming northwest  to north. Seas 1 to 2 feet. Wave Detail: Northwest to north 2  feet at 4 seconds. A chance of showers and thunderstorms.  TONIGHT  Northwest to north winds near 5 knots, becoming  southeast to south after midnight. Seas around 1 foot. Wave  Detail: Northwest to north 1 foot at 5 seconds. A chance of  showers and thunderstorms.  SATURDAY  South to southwest winds 5 to 10 knots, becoming south.  Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 5  seconds. A chance of showers and thunderstorms.  SATURDAY NIGHT  Southeast to south winds 5 to 10 knots,  increasing to near 10 knots. Seas 1 to 2 feet. A chance of  showers and thunderstorms.  SUNDAY  South to southwest winds near 10 knots, decreasing to 5  to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight  chance of thunderstorms.  SUNDAY NIGHT  South to southwest winds 5 to 10 knots, becoming  south and increasing to near 10 knots. Seas 1 to 2 feet. A slight  chance of showers and thunderstorms.  MONDAY  South winds near 10 knots, becoming southwest and  decreasing to 5 to 10 knots. Seas 1 to 2 feet. A chance of  showers with a slight chance of thunderstorms.  MONDAY NIGHT  South winds 5 to 10 knots. Seas around 1 foot. A  slight chance of showers.  TUESDAY  Southeast to south winds 5 to 10 knots. Seas 1 to  2 feet.  TUESDAY NIGHT  Southeast winds 5 to 10 knots. Seas around  1 foot. A slight chance of showers.    $$