Hazardous marine condition(s):
Short Term Forecast
GMZ005-261430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1027 PM EDT Fri Sep 25 2026
.SYNOPSIS...
An early season cold front will remain draped across the distant
Straits of Florida for much of the weekend, supporting light to
gentle northerlies. A Nor'easter off the Eastern Seaboard will
support a northeasterly swell with large periods in the eastern
marine zones through Sunday. The front will push back northward on
Monday through the marine zones. Winds will then clock back
around to the southeast to south for early next week, also
accompanied by increasing rain and thunder chances.
The Approximate Shoreward Edge of the Gulf Stream as of September
15, 2026...
64 NM south-southeast of Dry Tortugas Light, on Loggerhead Key
40 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
36 NM south-southeast of Sand Key Light, off Key West
35 NM southeast of Looe Key, off Big Pine Key
28 NM southeast of Sombrero Key Light, off Marathon
15 NM east-southeast of Alligator Reef Light, off Islamorada
8 NM east-southeast of Molasses Reef Light, off Key Largo
5 NM east-southeast of Carysfort Reef Light, off Ocean Reef
Gulf Stream Information Courtesy of the Naval Oceanographic Office.
$$
GMZ033-034-261430- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1027 PM EDT Fri Sep 25 2026 OVERNIGHT North to northeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Northwest to north 2 feet at 5 seconds. A slight chance of showers. SATURDAY Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: North 2 feet at 4 seconds. A slight chance of showers. SATURDAY NIGHT North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: Northwest to north 1 foot at 5 seconds. A slight chance of showers. SUNDAY North to northeast winds near 5 knots. Seas around 1 foot. A slight chance of showers. SUNDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. A slight chance of showers. MONDAY Southeast to south winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. MONDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. TUESDAY AND TUESDAY NIGHT Southeast to south winds 5 to 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. WEDNESDAY East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet, building to around 2 feet. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Showers likely with a chance of thunderstorms. $$
GMZ033-034-261430- 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- 1027 PM EDT Fri Sep 25 2026 OVERNIGHT North to northeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Northwest to north 2 feet at 5 seconds. A slight chance of showers. SATURDAY Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: North 2 feet at 4 seconds. A slight chance of showers. SATURDAY NIGHT North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: Northwest to north 1 foot at 5 seconds. A slight chance of showers. SUNDAY North to northeast winds near 5 knots. Seas around 1 foot. A slight chance of showers. SUNDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. A slight chance of showers. MONDAY Southeast to south winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. MONDAY NIGHT Southeast to south winds near 5 knots. Seas 1 foot or less. Showers likely with a chance of thunderstorms. TUESDAY AND TUESDAY NIGHT Southeast to south winds 5 to 10 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. WEDNESDAY East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet, building to around 2 feet. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Showers likely with a chance of thunderstorms. $$