Hazardous marine condition(s):
Short Term Forecast
GMZ005-132045-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
440 AM EDT Sun Sep 13 2026
.SYNOPSIS...
A weak pressure pattern today will result in light and varying
breezes. Breezes will gradually firm up out of the northeast to
east over the next few days as a continental high builds southward
towards our area. Low level moisture will remain abundant through
at least today, and keep convective potential above normal.
Rain chances should fall to near normal early in the week as
drier lower levels filter in. The ridge will be reinforced through
the first half of the week resulting in freshening northeast to
easterly breezes.
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.
$$
GMZ033-034-132045- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 440 AM EDT Sun Sep 13 2026 TODAY Southeast to south winds near 10 knots, becoming northwest to north near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. TONIGHT Northeast winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY Northeast winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. TUESDAY East winds near 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY NIGHT Northeast to east winds increasing to near 15 knots. Seas building to 2 to 3 feet. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT Northeast to east winds near 15 knots. Seas building to 2 to 4 feet. Showers and thunderstorms likely. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Showers and thunderstorms likely. THURSDAY NIGHT East winds 10 to 15 knots. Seas around 2 feet. Showers with a chance of thunderstorms. $$
GMZ033-034-132045- 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- 440 AM EDT Sun Sep 13 2026 TODAY Southeast to south winds near 10 knots, becoming northwest to north near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. TONIGHT Northeast winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY Northeast winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. TUESDAY East winds near 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY NIGHT Northeast to east winds increasing to near 15 knots. Seas building to 2 to 3 feet. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT Northeast to east winds near 15 knots. Seas building to 2 to 4 feet. Showers and thunderstorms likely. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Showers and thunderstorms likely. THURSDAY NIGHT East winds 10 to 15 knots. Seas around 2 feet. Showers with a chance of thunderstorms. $$