GMZ005-160845-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 432 PM EDT Sun Mar 15 2026
 
 
 .SYNOPSIS...Surface high pressure will begin sliding back
 eastward as a strong, large surface low pressure system takes
 shape across the Midwest. This low pressure system will move into
 the northern Great Lakes region on Monday with a trailing front
 draped across the western Gulf Basin. In the short term, this will
 maintain breezes peaking overnight and lulling during the
 afternoon. The aforementioned cold front will sweep through the
 Keys late Monday. In its wake expect freshening northwest to
 north by early Tuesday. Fresh to strong breezes are becoming
 increasingly likely following the front during the middle of next
 week.
 
 The Approximate Shoreward Edge of the Gulf Stream as of March 7...
 
 55 NM South of Dry Tortugas Light...on Loggerhead Key.
 15 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 7 NM South of Sand Key Light...off Key West.
 8 NM South of Looe Key...off Big Pine Key.
 10 NM Southeast of Sombrero Key Light...off Marathon.
 8 NM Southeast of Alligator Reef Light...off Islamorada.
 5 NM Southeast of Molasses Reef Light...off Key Largo.
 3 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 and RTOFS.
 
 $$




 
 GMZ052>055-072>075-160845-
 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-
 432 PM EDT Sun Mar 15 2026
 
 SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS
 

 TONIGHT
 Southeast winds near 15 knots, increasing to southeast
 to south 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5
 feet. Wave Detail: East 4 feet at 6 seconds. A chance of showers
 and thunderstorms.

 MONDAY
 South winds near 15 knots, decreasing to 10 to 15
 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at
 5 seconds. A chance of showers and thunderstorms.

 MONDAY NIGHT
 Southwest winds 10 to 15 knots, becoming west to
 northwest 15 to 20 knots late. Seas 1 to 3 feet, building to 2 to
 4 feet. Wave Detail: South to southwest 2 feet at 4 seconds and
 northeast to east 1 foot at 5 seconds. Showers likely with a
 chance of thunderstorms.

 TUESDAY
 North winds 15 to 20 knots, becoming north to northeast
 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building
 to 4 to 7 feet, occasionally to 9 feet. A chance of showers and
 thunderstorms.

 TUESDAY NIGHT
 North to northeast winds 20 to 25 knots. Seas
 6 to 8 feet, occasionally to 10 feet. Showers likely with a
 chance of thunderstorms.

 WEDNESDAY
 Northeast winds near 20 knots. Seas 5 to 8 feet,
 occasionally to 10 feet. Showers likely with a chance of
 thunderstorms.

 WEDNESDAY NIGHT
 North to northeast winds 20 to 25 knots. Seas
 6 to 8 feet, occasionally to 10 feet. Showers likely with a
 slight chance of thunderstorms.

 THURSDAY
 North to northeast winds 20 to 25 knots, decreasing
 to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. A
 chance of showers with a slight chance of thunderstorms.

 THURSDAY NIGHT
 North to northeast winds near 20 knots. Seas
 5 to 8 feet, occasionally to 10 feet. A chance of showers.

 FRIDAY
 North to northeast winds 15 to 20 knots. Seas 5 to
 7 feet, occasionally to 9 feet. A slight chance of showers.

 FRIDAY NIGHT
 North to northeast winds near 15 knots. Seas 4 to
 6 feet, occasionally to 8 feet. A slight chance of showers.
 
 $$