GMZ005-301530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1024 PM EST Mon Dec 29 2025
.SYNOPSIS...High pressure will continue to shift south through
the eastern Gulf overnight as a cold front approaches South
Florida. The front is expected to push southeastwards across Keys
waters Tuesday and Tuesday night and will lead to freshening
northerly breezes throughout all the Florida Keys coastal waters.
The exception will be 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.
$$
GMZ033-034-301530- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1024 PM EST Mon Dec 29 2025 SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS SMALL CRAFT ADVISORY WILL LIKELY BE REQUIRED TUESDAY OVERNIGHT Northwest winds near 10 knots early, increasing to 15 to 20 knots late. Seas around 1 foot, building to 2 to 3 feet. Isolated showers. TUESDAY Northwest to north winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northwest to north 1 foot at 2 seconds. Isolated showers. TUESDAY NIGHT North winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northwest to north 5 feet at 6 seconds. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to 4 feet. WEDNESDAY NIGHT Northwest to north winds 10 to 15 knots. Seas 2 to 3 feet. THURSDAY North winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas around 2 feet. THURSDAY NIGHT North winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY East winds 5 to 10 knots. Seas around 1 foot. FRIDAY NIGHT Southeast winds 5 to 10 knots. Seas around 1 foot. SATURDAY South winds 5 to 10 knots. Seas around 1 foot. SATURDAY NIGHT Southwest winds 5 to 10 knots. Seas 1 to 2 feet. $$
GMZ033-034-301530- 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- 1024 PM EST Mon Dec 29 2025 SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS SMALL CRAFT ADVISORY WILL LIKELY BE REQUIRED TUESDAY OVERNIGHT Northwest winds near 10 knots early, increasing to 15 to 20 knots late. Seas around 1 foot, building to 2 to 3 feet. Isolated showers. 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. Wave Detail: Northwest to north 5 feet at 6 seconds. 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. SATURDAY South winds 5 to 10 knots. Seas around 1 foot. SATURDAY NIGHT Southwest winds 5 to 10 knots. Seas 1 to 2 feet. $$