GMZ005-292130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 AM EST Mon Dec 29 2025
.SYNOPSIS...High pressure will meander in the eastern Gulf today
into tonight, resulting in light breezes. A cold front is
expected to push southeastwards across Keys waters Tuesday and
Tuesday night. This will lead to freshening northerly breezes
throughout all the Florida Keys coastal waters, with our
easternmost waters likely holding off until late Tuesday. Small
Craft Advisories are becoming increasingly likely for portions of
Keys waters on Tuesday into Tuesday night.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 NM Southeast of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT and RTOFS.
$$
GMZ033-034-292130- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 423 AM EST Mon Dec 29 2025 SMALL CRAFT ADVISORY MAY BE REQUIRED LATE TONIGHT TODAY Northeast winds near 5 knots, becoming northwest to north this afternoon. Seas 1 foot or less. TONIGHT Northwest winds 5 to 10 knots, becoming northwest to north 15 to 20 knots overnight. Seas building to 2 to 3 feet. Isolated showers overnight. TUESDAY Northwest to north winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northwest to north 1 foot at 2 seconds. Isolated showers. TUESDAY NIGHT North winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to 4 feet. WEDNESDAY NIGHT Northwest to north winds 10 to 15 knots. Seas 2 to 3 feet. THURSDAY North winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas around 2 feet. THURSDAY NIGHT North winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY East winds 5 to 10 knots. Seas around 1 foot. FRIDAY NIGHT Southeast winds 5 to 10 knots. Seas around 1 foot. $$
GMZ033-034-292130- 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- 423 AM EST Mon Dec 29 2025 SMALL CRAFT ADVISORY MAY BE REQUIRED LATE TONIGHT TODAY Northeast winds near 5 knots, becoming northwest to north this afternoon. Seas 1 foot or less. TONIGHT Northwest winds 5 to 10 knots, becoming northwest to north 15 to 20 knots overnight. Seas building to 2 to 3 feet. Isolated showers overnight. TUESDAY Northwest to north winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northwest to north 1 foot at 2 seconds. Isolated showers. TUESDAY NIGHT North winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to 4 feet. WEDNESDAY NIGHT Northwest to north winds 10 to 15 knots. Seas 2 to 3 feet. THURSDAY North winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas around 2 feet. THURSDAY NIGHT North winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY East winds 5 to 10 knots. Seas around 1 foot. FRIDAY NIGHT Southeast winds 5 to 10 knots. Seas around 1 foot. $$