GMZ005-052130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
425 AM EST Fri Dec 5 2025
.SYNOPSIS...A high pressure system over the southwestern North
Atlantic will slide east, while a coastal low pressure takes shape
off the Carolina's Coast today. This will lead to a weakening
pressure gradient across the area with slackening breezes through
the upcoming weekend. Thereafter, a developing weather system
will move out of the Central Plains and into the Southeast U.S. by
Sunday evening. The attendent cold front will sweep through Monday
night with a brief period of moderate to fresh breezes. Shower
coverage will steadily increase starting Saturday evening and
continuing into 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.
$$
GMZ032-035-052130- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 425 AM EST Fri Dec 5 2025 TODAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot or less. Nearshore waters smooth to a light chop. TONIGHT East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY Southeast winds 5 to 10 knots, becoming south to southwest in the afternoon. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY NIGHT Southwest winds 5 to 10 knots, becoming southwest to west near 10 knots. Seas building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers. MONDAY Southwest to west winds 10 to 15 knots, becoming west to northwest near 15 knots. Seas building to 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a moderate chop. Scattered showers. MONDAY NIGHT Northwest winds near 15 knots, becoming north to northeast 15 to 20 knots. Seas 2 to 3 feet, except building to 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop, becoming choppy. Isolated showers. TUESDAY Northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. Isolated showers. TUESDAY NIGHT Northwest to north winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. Scattered showers. $$
GMZ032-035-052130- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 425 AM EST Fri Dec 5 2025 TODAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot or less. Nearshore waters smooth to a light chop. TONIGHT East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY Southeast winds 5 to 10 knots, becoming south to southwest in the afternoon. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers. SUNDAY NIGHT Southwest winds 5 to 10 knots, becoming southwest to west near 10 knots. Seas building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers. MONDAY Southwest to west winds 10 to 15 knots, becoming west to northwest near 15 knots. Seas building to 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a moderate chop. Scattered showers. MONDAY NIGHT Northwest winds near 15 knots, becoming north to northeast 15 to 20 knots. Seas 2 to 3 feet, except building to 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop, becoming choppy. Isolated showers. TUESDAY Northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. Isolated showers. TUESDAY NIGHT Northwest to north winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. Scattered showers. $$