GMZ005-050345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 AM EST Thu Dec 4 2025
.SYNOPSIS...Gentle to moderate northeasterly breezes will begin to
veer southeasterly tonight. A messy high pressure system over the
eastern CONUS will allow breezes to slacken to light to gentle
over the weekend. Shower coverage will start to increase by the
start of next week as breezes become southerly, and a cold frontal
passage is possible early next week.
The Approximate Shoreward Edge of the Gulf Stream as of December 4...
21 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
22 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
8 NM Southeast of Sombrero Key Light...off Marathon.
6 NM Southeast of Alligator Reef Light...off Islamorada.
3 NM Southeast of Molasses Reef Light...off Key Largo.
1 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.
$$
GMZ042>044-050345- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1031 AM EST Thu Dec 4 2025 THIS AFTERNOON Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop. TONIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet, except subsiding to around 2 feet west of Cosgrove Shoal Light feet. Nearshore waters a light to moderate chop. FRIDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a smooth to a light chop. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas subsiding to around 1 foot. Nearshore waters smooth to a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast to south winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY South to southwest winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY NIGHT Southwest to west winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers. MONDAY West to northwest winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. Scattered showers. MONDAY NIGHT Northwest to north winds 10 to 15 knots, becoming north to northeast near 15 knots. Seas 1 to 2 feet, except building to 2 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers. $$
GMZ042>044-050345- Hawk Channel from Ocean Reef to Craig Key out to the reef- 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- 1031 AM EST Thu Dec 4 2025 THIS AFTERNOON Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop. TONIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet, except subsiding to around 2 feet west of Cosgrove Shoal Light feet. Nearshore waters a light to moderate chop. FRIDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a smooth to a light chop. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas subsiding to around 1 foot. Nearshore waters smooth to a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast to south winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY South to southwest winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY NIGHT Southwest to west winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers. MONDAY West to northwest winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. Scattered showers. MONDAY NIGHT Northwest to north winds 10 to 15 knots, becoming north to northeast near 15 knots. Seas 1 to 2 feet, except building to 2 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers. $$