GMZ005-091530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1017 PM EST Mon Dec 8 2025
.SYNOPSIS...Breezes will freshen and clock around to the north to
northeast during the overnight hours as a fractured frontal
boundary moves across the Florida Keys marine zones. The front
will stall across the Straits of Florida, with the highest shower
coverage focused in the distant coastal waters south of the Island
Chain. Breezes will fluctuate between gentle and moderate during
the 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>044-091530- 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- 1017 PM EST Mon Dec 8 2025 SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS TONIGHT West winds 10 to 15 knots, becoming north to northeast and increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms. TUESDAY North to northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a moderate chop. Scattered showers. TUESDAY NIGHT Northeast to east winds near 15 knots, decreasing to 10 to 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, becoming a light to moderate chop. Scattered showers. WEDNESDAY Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers. WEDNESDAY NIGHT North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers. THURSDAY North to northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. THURSDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. FRIDAY AND FRIDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY 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. Isolated showers. SATURDAY NIGHT Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Isolated showers. $$
GMZ042>044-091530- 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- 1017 PM EST Mon Dec 8 2025 SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS TONIGHT West winds 10 to 15 knots, becoming north to northeast and increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms. TUESDAY North to northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a moderate chop. Scattered showers. TUESDAY NIGHT Northeast to east winds near 15 knots, decreasing to 10 to 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, becoming a light to moderate chop. Scattered showers. WEDNESDAY Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers. WEDNESDAY NIGHT North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers. THURSDAY North to northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. THURSDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. FRIDAY AND FRIDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY 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. Isolated showers. SATURDAY NIGHT Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Isolated showers. $$