GMZ005-132145-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
431 AM EST Sat Dec 13 2025
.SYNOPSIS...Moderate to occasionally fresh northeast to easterly
breezes will slightly slacken over the day into tonight. 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 tonight
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.
$$
GMZ033-034-132145-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
431 AM EST Sat Dec 13 2025
TODAY
Northeast to east winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2
feet at 4 seconds and northwest 1 foot at 5 seconds. Scattered
showers and isolated thunderstorms in the afternoon.
TONIGHT
East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4
seconds. Numerous showers and scattered thunderstorms.
SUNDAY
North to northeast winds 5 to 10 knots, increasing to 10
to 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Wave
Detail: Northeast to east 1 foot at 3 seconds. Isolated showers
and thunderstorms.
SUNDAY NIGHT
North winds 15 to 20 knots. Seas 2 to 3 feet,
building to 3 to 5 feet, occasionally to 6 feet. Isolated
showers.
MONDAY
Northeast winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
MONDAY NIGHT
Northeast winds near 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
TUESDAY
Northeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated
showers.
TUESDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet. Isolated showers.
WEDNESDAY
East winds near 15 knots. Seas 2 to 3 feet. Isolated
showers.
WEDNESDAY NIGHT
East winds near 15 knots. Seas 2 to 3 feet.
Isolated showers.
$$
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