GMZ005-160845-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
432 PM EDT Tue Sep 15 2026
.SYNOPSIS...
Light to gentle east to southeasterly breezes will gradually back
to the northeast to east and freshen this evening, as a
continental high builds southward towards our area. Expect breezes
to peak in the moderate range this evening through late
Wednesday. Rain chances will trend considerably upwards through
the end of the work week and into the first part of the weekend,
as broad troughing in the western North Atlantic and increased
moisture retrogrades southwestward towards the Keys.
The Approximate Shoreward Edge of the Gulf Stream as of September
11, 2026...
26 NM south of Dry Tortugas Light, on Loggerhead Key
15 NM south of Cosgrove Shoal Light, off the Marquesas Keys
15 NM south of Sand Key Light, off Key West
11 NM south-southeast of Looe Key, off Big Pine Key
8 NM southeast 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 east-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.
$$
GMZ033-034-160845- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 432 PM EDT Tue Sep 15 2026 TONIGHT East to southeast winds 5 to 10 knots, becoming northeast to east and increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Wave Detail: East 2 feet at 3 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 3 feet at 4 seconds. Showers likely with a chance of thunderstorms. THURSDAY East winds near 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Showers with a chance of thunderstorms. THURSDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. FRIDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Showers likely with a chance of thunderstorms. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Showers likely with a chance of thunderstorms. SATURDAY East to southeast winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. SATURDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY South winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. $$
GMZ033-034-160845- 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- 432 PM EDT Tue Sep 15 2026 TONIGHT East to southeast winds 5 to 10 knots, becoming northeast to east and increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Wave Detail: East 2 feet at 3 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 3 feet at 4 seconds. Showers likely with a chance of thunderstorms. THURSDAY East winds near 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Showers with a chance of thunderstorms. THURSDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. FRIDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Showers likely with a chance of thunderstorms. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Showers likely with a chance of thunderstorms. SATURDAY East to southeast winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. SATURDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY South winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. $$