GMZ005-220830-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 431 PM EDT Tue Jul 21 2026
 
 
 .SYNOPSIS...As of 2 PM EDT, Tropical Storm Bertha was centered
 over the northeastern Gulf waters. Bertha is expected to continue
 moving slowly to the northwest or west-northwest today, followed
 by a turn to the west by the middle part of the week. On the
 forecast track, Tropical Storm Bertha will move near or along the
 northern Gulf coast during the next several days. Closer to home,
 an Atlantic ridge of high pressure will extend to the Florida
 Peninsula for the next several days. Moderate breezes will slacken
 to mainly gentle this afternoon. Thereafter, breezes will
 continue to peak overnight and lull during the day through Friday.
 
 The Approximate Shoreward Edge of the Gulf Stream as of July 17,
 2026...
 
 49 NM South of Dry Tortugas Light...on Loggerhead Key.
 51 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 38 NM South of Sand Key Light...off Key West.
 22 NM South of Looe Key...off Big Pine Key.
 13 NM South of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 2 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, using data from RTOFS and NASA SPoRT SST.
 
 $$




 
 GMZ052>055-072>075-220830-
 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-
 431 PM EDT Tue Jul 21 2026
 

 TONIGHT
 Southeast winds 10 to 15 knots, increasing to near 15
 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at
 5 seconds and west 2 feet at 6 seconds. A slight chance of showers
 and thunderstorms.

 WEDNESDAY
 East to southeast winds 10 to 15 knots. Seas 2 to
 3 feet. Wave Detail: East to southeast 3 feet at 5 seconds and
 west 2 feet at 7 seconds. A slight chance of showers and
 thunderstorms.

 WEDNESDAY NIGHT
 East winds 10 to 15 knots. Seas 2 to 4 feet,
 occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and
 west 1 foot at 7 seconds. A slight chance of showers and
 thunderstorms.

 THURSDAY
 East winds near 10 knots. Seas 2 to 3 feet. A slight
 chance of showers and thunderstorms.

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

 FRIDAY
 East winds near 10 knots, decreasing to 5 to 10 knots.
 Seas 2 to 3 feet, subsiding to 1 to 2 feet. A chance of showers
 and thunderstorms.

 FRIDAY NIGHT
 East to southeast winds 5 to 10 knots. Seas 1 to
 2 feet. A slight chance of showers and thunderstorms.

 SATURDAY
 Southeast winds 5 to 10 knots. Seas 1 to 2 feet.

 SATURDAY NIGHT
 East to southeast winds near 5 knots. Seas
 around 1 foot.

 SUNDAY
 East to southeast winds near 5 knots, becoming north.
 Seas around 1 foot.

 SUNDAY NIGHT
 North winds near 5 knots, becoming southwest to
 west. Seas 1 foot or less. A slight chance of showers and
 thunderstorms.
 
 $$