GMZ005-120930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 PM EST Thu Dec 11 2025
.SYNOPSIS...As high pressure drifts eastward over the next
several days and eventually into the western North Atlantic,
north to northeast winds will clock around to the northeast to
east. The next frontal boundary is progged to push through the
Florida Keys marine zones on Sunday night. Ahead of the front,
elevated chances for showers and thunderstorms will be possible
late Saturday through early Sunday. In the wake of the frontal
passage, fresh to strong northeasterly breezes are expected Sunday
night through at least Tuesday.
The Approximate Shoreward Edge of the Gulf Stream as of December 8...
15 NM South of Dry Tortugas Light...on Loggerhead Key.
13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
14 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
23 NM Southeast of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
12 NM Southeast of Molasses Reef Light...off Key Largo.
8 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.
$$
GMZ033-034-120930-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
417 PM EST Thu Dec 11 2025
TONIGHT
North to northeast winds near 10 knots, becoming
northeast to east. Seas 2 to 3 feet. Wave Detail: Northwest to
north 3 feet at 6 seconds.
FRIDAY
Northeast to east winds near 10 knots. Seas 2 to 3
feet. Wave Detail: Northwest to north 3 feet at 6 seconds and
northeast to east 1 foot at 3 seconds.
FRIDAY NIGHT
Northeast to east near 10 knots, increasing 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 3 seconds
and northwest 2 feet at 6 seconds. Isolated showers.
SATURDAY
Northeast to east winds 10 to 15 knots. Seas 2 to 3
feet. Isolated showers.
SATURDAY NIGHT
Northeast to east winds 10 to 15 knots,
decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to
2 feet. Scattered showers and isolated thunderstorms.
SUNDAY
North to northeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet.
Scattered showers.
SUNDAY NIGHT
North to northeast winds near 15 knots, increasing
to near 20 knots. Seas 2 to 3 feet, building to 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
MONDAY AND MONDAY NIGHT
Northeast winds near 20 knots. Seas 4
to 6 feet, occasionally to 8 feet. Isolated showers.
TUESDAY AND TUESDAY NIGHT
Northeast winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
$$
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