GMZ005-131545-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1042 PM EST Fri Dec 12 2025
.SYNOPSIS...High pressure drifting eastward into the western
North Atlantic will result in gentle to moderate, occasionally
fresh, northeast to east breezes overnight. 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.
$$
GMZ031-131545-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1042 PM EST Fri Dec 12 2025
OVERNIGHT
Northeast to east winds near 10 knots. Bay waters a
light chop. Isolated showers.
SATURDAY
East winds 10 to 15 knots. Bay waters a light to
moderate chop. Scattered showers. Scattered showers and isolated
thunderstorms in the afternoon.
SATURDAY NIGHT
East winds 10 to 15 knots, decreasing to 5 to 10
knots. Bay waters a light to moderate chop, becoming smooth to a
light chop. Numerous showers and scattered thunderstorms.
SUNDAY
North to northeast winds 5 to 10 knots, becoming north
and increasing to near 10 knots. Bay waters smooth to a light
chop, becoming a light chop. Scattered showers and isolated
thunderstorms.
SUNDAY NIGHT
North winds 10 to 15 knots, increasing to 15 to 20
knots. Bay waters a light to moderate chop, becoming choppy.
Isolated showers.
MONDAY
Northeast winds near 20 knots. Bay waters rough.
Isolated showers.
MONDAY NIGHT
Northeast winds near 20 knots. Bay waters rough.
Isolated showers.
TUESDAY
Northeast winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
TUESDAY NIGHT
Northeast to east winds near 15 knots. Bay
waters a moderate chop. Isolated showers.
WEDNESDAY
East winds near 15 knots. Bay waters a moderate
chop. Isolated showers.
WEDNESDAY NIGHT
East winds 10 to 15 knots. Bay waters a light
to moderate chop. Isolated showers.
$$
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