GMZ005-030930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
458 PM EST Tue Dec 2 2025
.SYNOPSIS...A developing low pressure system extends from the
Carolinas to the Florida Panhandle. A corresponding cold front is
expected to press through the Keys late overnight into Wednesday
morning. In the wake, breezes will freshen out of the north to
northeast Wednesday. Another surface high builds back in following
the front with gentle broadly southern breezes returning in time
for the weekend. There is the potential for another frontal
passage Sunday afternoon and evening.
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>044-030930- 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- 458 PM EST Tue Dec 2 2025 TONIGHT Southwest winds 10 to 15 knots early, becoming southwest to west near 10 knots in the evening, then becoming west to northwest 5 to 10 knots after midnight. Seas around 2 feet, subsiding to around 1 foot. Nearshore waters a light to moderate chop, becoming 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. Patchy fog in the morning. WEDNESDAY NIGHT North to northeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming a light to moderate chop. THURSDAY Northeast to east winds 10 to 15 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 to moderate chop. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. FRIDAY East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. FRIDAY NIGHT Southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY Southeast to south winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY NIGHT Southeast winds near 10 knots, becoming south 10 to 15 knots. Seas 1 to 2 feet, building to around 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. Isolated showers. SUNDAY Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers. SUNDAY NIGHT West to northwest 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. Scattered showers. $$
GMZ042>044-030930- 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- 458 PM EST Tue Dec 2 2025 TONIGHT Southwest winds 10 to 15 knots early, becoming southwest to west near 10 knots in the evening, then becoming west to northwest 5 to 10 knots after midnight. Seas around 2 feet, subsiding to around 1 foot. Nearshore waters a light to moderate chop, becoming 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. Patchy fog in the morning. WEDNESDAY NIGHT North to northeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop, becoming a light to moderate chop. THURSDAY Northeast to east winds 10 to 15 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 to moderate chop. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. FRIDAY East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. FRIDAY NIGHT Southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY Southeast to south winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. SATURDAY NIGHT Southeast winds near 10 knots, becoming south 10 to 15 knots. Seas 1 to 2 feet, building to around 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. Isolated showers. SUNDAY Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers. SUNDAY NIGHT West to northwest 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. Scattered showers. $$