GMZ005-260830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 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.
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