Hazardous marine condition(s):
Small Craft Advisory
GMZ005-302345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
640 AM EST Tue Dec 30 2025
.SYNOPSIS...A cold front will continue pressing through the Keys
this morning. This will lead to freshening northerly breezes,
thus A Small Craft Advisory is in effect for all the Florida Keys
coastal waters today, except for the easternmost waters where
breezes will take more time to freshen. In the wake of the front,
high pressure currently across Texas will slowly weaken as it
moves east to southeast into the eastern Gulf. This will promote
gradually slackening breezes. This high moves overhead towards the
end of the week/weekend resulting in further slackening breezes.
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.
$$
GMZ043-044-302345- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 640 AM EST Tue Dec 30 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northwest to north winds 15 to 20 knots, increasing to 20 to 25 knots this afternoon. Seas 1 to 2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, building to 4 to 6 feet, occasionally to 8 feet. Nearshore waters choppy, becoming very rough. Isolated showers this morning. TONIGHT North winds 20 to 25 knots, decreasing to near 20 knots. Seas 2 to 3 feet, except 5 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming rough. WEDNESDAY North winds near 20 knots, becoming northwest to north near 15 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough, becoming a moderate chop. WEDNESDAY NIGHT Northwest to north winds near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a moderate chop. THURSDAY North winds 10 to 15 knots, becoming north to northeast 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, becoming smooth to a light chop. THURSDAY NIGHT North to northeast winds 5 to 10 knots, becoming northeast. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. FRIDAY Northeast to east winds near 5 knots, becoming variable. Seas around 1 foot. Nearshore waters smooth. FRIDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. SATURDAY Variable winds near 5 knots, becoming southwest 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. SATURDAY NIGHT Southwest to west winds near 10 knots. Seas 1 foot or less. Nearshore waters a light chop. $$
GMZ043-044-302345- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 640 AM EST Tue Dec 30 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northwest to north winds 15 to 20 knots, increasing to 20 to 25 knots this afternoon. Seas 1 to 2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, building to 4 to 6 feet, occasionally to 8 feet. Nearshore waters choppy, becoming very rough. Isolated showers this morning. TONIGHT North winds 20 to 25 knots, decreasing to near 20 knots. Seas 2 to 3 feet, except 5 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming rough. WEDNESDAY North winds near 20 knots, becoming northwest to north near 15 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough, becoming a moderate chop. WEDNESDAY NIGHT Northwest to north winds near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a moderate chop. THURSDAY North winds 10 to 15 knots, becoming north to northeast 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, becoming smooth to a light chop. THURSDAY NIGHT North to northeast winds 5 to 10 knots, becoming northeast. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. FRIDAY Northeast to east winds near 5 knots, becoming variable. Seas around 1 foot. Nearshore waters smooth. FRIDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. SATURDAY Variable winds near 5 knots, becoming southwest 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. SATURDAY NIGHT Southwest to west winds near 10 knots. Seas 1 foot or less. Nearshore waters a light chop. $$