GMZ005-140245-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 1031 AM EDT Thu Aug 13 2026
 
 
 .SYNOPSIS...A high pressure system in the central North Atlantic
 will continue to slide eastward and weaken this afternoon. Gentle
 east to southeast breezes will slacken, becoming light and
 variable this afternoon before becoming northeast to east this
 evening. As the high restrengthens and builds westward, breezes
 will somewhat freshen for Friday through the weekend. A weak
 frontal boundary will approach the Florida Peninsula early next
 week, allowing breezes to slacken once again, becoming light and
 variable at times.
 
 The Approximate Shoreward Edge of the Gulf Stream as of
 August 13, 2026...
 
 38 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.
 21 NM South of Looe Key...off Big Pine Key.
 18 NM Southeast of Sombrero Key Light...off Marathon.
 7 NM Southeast of Alligator Reef Light...off Islamorada.
 7 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.
 
 $$




 
 GMZ052>055-072>075-140245-
 Straits of Florida from Ocean Reef to Craig Key out 20 NM-
 Straits of Florida from Craig Key to west end of Seven Mile
 Bridge out 20 NM-
 Straits of Florida from west end of Seven Mile Bridge to south of
 Halfmoon Shoal out 20 NM-
 Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
 Tortugas out 20 NM-
 Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
 Straits of Florida from Craig Key to west end of Seven Mile
 Bridge 20 to 60 NM out-
 Straits of Florida from west end of Seven Mile Bridge to south of
 Halfmoon Shoal 20 to 60 NM out-
 Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
 Tortugas 20 to 60 NM out-
 1031 AM EDT Thu Aug 13 2026
 

 THIS AFTERNOON
 East to southeast winds 5 to 10 knots, becoming
 northeast to east late. Seas 1 to 2 feet. Wave Detail: East to
 southeast 1 foot at 4 seconds. A slight chance of showers and
 thunderstorms.

 TONIGHT
 Northeast to east winds 5 to 10 knots, becoming east to
 southeast and increasing to near 10 knots. Seas 1 to 2 feet,
 building to around 2 feet. Wave Detail: East 2 feet at 4 seconds.
 A slight chance of showers and thunderstorms.

 FRIDAY
 East winds near 10 knots, increasing to 10 to 15 knots.
 Seas around 2 feet, building to 2 to 3 feet. Wave Detail: East 2
 feet at 4 seconds. A chance of showers and thunderstorms.

 FRIDAY NIGHT
 East to southeast winds near 15 knots. Seas 2 to
 4 feet, occasionally to 5 feet. A chance of showers and
 thunderstorms.

 SATURDAY
 East to southeast winds 10 to 15 knots, decreasing to
 near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding
 to 2 to 3 feet. A chance of showers and thunderstorms.

 SATURDAY NIGHT
 East to southeast winds 10 to 15 knots. Seas 2
 to 3 feet. A slight chance of showers and thunderstorms.

 SUNDAY
 East to southeast winds 10 to 15 knots, decreasing to
 near 10 knots. Seas 2 to 3 feet.

 SUNDAY NIGHT
 East winds 10 to 15 knots. Seas 2 to 3 feet.

 MONDAY
 East winds 10 to 15 knots, decreasing to near 10 knots.
 Seas 2 to 3 feet, subsiding to around 2 feet.

 MONDAY NIGHT
 Northeast to east winds 5 to 10 knots. Seas 1 to
 2 feet. A slight chance of showers.
 
 $$