GMZ005-021530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 PM EST Mon Dec 1 2025
.SYNOPSIS...High pressure across the area will continue to
promote gentle to modestly moderate east to southeast breezes
overnight, shifting to the southeast by early Tuesday morning as
the high shifts farther east. A developing storm system on the
heels of this high will result in a weakening of the pressure
gradient across the Keys through early Wednesday. Breezes will
also clock around the compass going from southeast to south
Tuesday to northwest to north by early Wednesday. Its
corresponding cold front is expected to press through the Keys mid
to late week resulting in freshening north to northeast breezes.
The Approximate Shoreward Edge of the Gulf Stream as of November
28...
28 NM South of Dry Tortugas Light...on Loggerhead Key.
20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
17 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
9 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.
$$
GMZ042>044-021530- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1030 PM EST Mon Dec 1 2025 OVERNIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming southwest near 10 knots in the afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. Isolated showers. TUESDAY NIGHT West to northwest winds 5 to 10 knots. Seas subsiding to around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. WEDNESDAY North winds 5 to 10 knots. Seas around 1 foot, except building to 1 to 2 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop. WEDNESDAY NIGHT North to northeast winds increasing to near 10 knots. Seas 1 foot, except building to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters becoming a light chop. THURSDAY Northeast to east winds near 10 knots. Seas 1 to 2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, subsiding to around 2 feet. Nearshore waters a light chop. THURSDAY NIGHT Northeast to east winds increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters becoming a light to moderate chop. FRIDAY East winds decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. SATURDAY Southeast to south winds near 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. $$
GMZ042>044-021530- 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- 1030 PM EST Mon Dec 1 2025 OVERNIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming southwest near 10 knots in the afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. Isolated showers. TUESDAY NIGHT West to northwest winds 5 to 10 knots. Seas subsiding to around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. WEDNESDAY North winds 5 to 10 knots. Seas around 1 foot, except building to 1 to 2 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop. WEDNESDAY NIGHT North to northeast winds increasing to near 10 knots. Seas 1 foot, except building to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters becoming a light chop. THURSDAY Northeast to east winds near 10 knots. Seas 1 to 2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, subsiding to around 2 feet. Nearshore waters a light chop. THURSDAY NIGHT Northeast to east winds increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters becoming a light to moderate chop. FRIDAY East winds decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. SATURDAY Southeast to south winds near 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers. $$