GMZ005-122030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EDT Sat Sep 12 2026
.SYNOPSIS...
Ridging across the southeastern United States and Florida will
maintain light to gentle east to southeasterly breezes over the
next few days. Low level moisture will remain abundant and keep
convective potential slightly above normal today, but fall back to
near normal early in the week as drier lower levels filter in.
The ridge will be reinforced late in the forecast and may drive
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.
$$
GMZ033-034-122030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 417 AM EDT Sat Sep 12 2026 TODAY Southeast winds near 10 knots, becoming northeast to east near around 5 knots. Seas 1 foot or less. Wave Detail: Southeast 1 foot at 3 seconds. A chance of showers and thunderstorms. TONIGHT Northeast to east winds near 5 knots, becoming southeast. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. A chance of showers and thunderstorms. SUNDAY Variable winds near 5 knots, becoming north to northeast around 5 knots in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY NIGHT Northeast to east winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY Northeast to east winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY Northeast to east winds 5 to 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY NIGHT Northeast to east winds near 10 knots, increasing to near 15 knots. Seas building to around 2 feet. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Thunderstorms likely. Showers. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. $$
GMZ033-034-122030- 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- 417 AM EDT Sat Sep 12 2026 TODAY Southeast winds near 10 knots, becoming northeast to east near around 5 knots. Seas 1 foot or less. Wave Detail: Southeast 1 foot at 3 seconds. A chance of showers and thunderstorms. TONIGHT Northeast to east winds near 5 knots, becoming southeast. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. A chance of showers and thunderstorms. SUNDAY Variable winds near 5 knots, becoming north to northeast around 5 knots in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. SUNDAY NIGHT Northeast to east winds near 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. MONDAY Northeast to east 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 around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY Northeast to east winds 5 to 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. TUESDAY NIGHT Northeast to east winds near 10 knots, increasing to near 15 knots. Seas building to around 2 feet. Showers likely with a chance of thunderstorms. WEDNESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Thunderstorms likely. Showers. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. $$