GMZ005-101530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1024 PM EST Sun Nov 9 2025
.SYNOPSIS...A potent cold front will push through the Florida Keys
marine zones starting tomorrow morning, bringing fresh to strong
northerly winds by the afternoon. While the next high builds in
behind the front, winds will shift out of the northeast and
gradually slacken. Moderate to occasionally fresh breezes will
remain possible through the end of the work week.
The Approximate Shoreward Edge of the Gulf Stream as of November
4...
42 NM South of Dry Tortugas Light...on Loggerhead Key.
42 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
30 NM South of Sand Key Light...off Key West.
29 NM South of Looe Key...off Big Pine Key.
27 NM Southeast of Sombrero Key Light...off Marathon.
14 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
3 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.
$$
GMZ042>044-101530- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1024 PM EST Sun Nov 9 2025 SMALL CRAFT ADVISORY WILL LIKELY BE REQUIRED TOMORROW OVERNIGHT Variable winds near 5 knots, becoming west to northwest and increasing to near 10 knots. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters smooth, becoming a light chop. Isolated showers. MONDAY West to northwest winds 10 to 15 knots, becoming northwest to north and increasing to 25 to 30 knots. Seas 1 to 2 feet, building to building to 3 to 5 feet, occasionally to 6 feet. West of Cosgrove Shoal Light, around 2 feet, building to 4 to 6 feet, occasionally to 8 feet. Nearshore waters very rough, increasing extremely rough in the afternoon. Scattered showers. MONDAY NIGHT North winds 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 6 to 9 feet, occasionally to 11 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough. TUESDAY North to northeast winds 25 to 30 knots, becoming 20 to 25 knots. Seas 4 to 6 feet, occasionally to 9 feet, except 6 to 8 feet, occasionally to 10 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough, becoming very rough. TUESDAY NIGHT Northeast winds 20 to 25 knots, becoming 15 to 20 knots. Seas subsiding to 2 to 4 feet, occasionally to 5 feet, except subsiding to 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming choppy. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy. WEDNESDAY NIGHT THROUGH FRIDAY NIGHT Northeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. $$
GMZ042>044-101530- 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- 1024 PM EST Sun Nov 9 2025 SMALL CRAFT ADVISORY WILL LIKELY BE REQUIRED TOMORROW OVERNIGHT Variable winds near 5 knots, becoming west to northwest and increasing to near 10 knots. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters smooth, becoming a light chop. Isolated showers. MONDAY West to northwest winds 10 to 15 knots, becoming northwest to north and increasing to 25 to 30 knots. Seas 1 to 2 feet, building to building to 3 to 5 feet, occasionally to 6 feet. West of Cosgrove Shoal Light, around 2 feet, building to 4 to 6 feet, occasionally to 8 feet. Nearshore waters very rough, increasing extremely rough in the afternoon. Scattered showers. MONDAY NIGHT North winds 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 6 to 9 feet, occasionally to 11 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough. TUESDAY North to northeast winds 25 to 30 knots, becoming 20 to 25 knots. Seas 4 to 6 feet, occasionally to 9 feet, except 6 to 8 feet, occasionally to 10 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough, becoming very rough. TUESDAY NIGHT Northeast winds 20 to 25 knots, becoming 15 to 20 knots. Seas subsiding to 2 to 4 feet, occasionally to 5 feet, except subsiding to 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming choppy. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy. WEDNESDAY NIGHT THROUGH FRIDAY NIGHT Northeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. $$