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.
$$
GMZ052>055-072>075-052130- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 425 AM EST Fri Dec 5 2025 TODAY East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at 5 seconds and northwest 1 foot at 5 seconds. Isolated showers. TONIGHT East to southeast winds near 10 knots. Seas around 2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. Isolated showers. SATURDAY Southeast winds near 10 knots. Seas subsiding to 1 to 2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. SATURDAY NIGHT Southeast winds near 10 knots. Seas 1 to 2 feet. Isolated showers. SUNDAY Southeast to south winds near 10 knots, becoming south to southwest 5 to 10 knots. Seas around 1 foot. Isolated showers. SUNDAY NIGHT Southwest to west winds increasing to near 10 knots. Seas around 1 foot. Scattered showers. MONDAY Southwest to west winds 10 to 15 knots, becoming west to northwest near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Scattered showers. MONDAY NIGHT Northwest to north winds near 15 knots, becoming north to northeast 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Scattered showers. TUESDAY Northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. TUESDAY NIGHT North to northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. $$
GMZ052>055-072>075-052130- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 425 AM EST Fri Dec 5 2025 TODAY East to southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at 5 seconds and northwest 1 foot at 5 seconds. Isolated showers. TONIGHT East to southeast winds near 10 knots. Seas around 2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. Isolated showers. SATURDAY Southeast winds near 10 knots. Seas subsiding to 1 to 2 feet. Wave Detail: East to southeast 2 feet at 4 seconds. SATURDAY NIGHT Southeast winds near 10 knots. Seas 1 to 2 feet. Isolated showers. SUNDAY Southeast to south winds near 10 knots, becoming south to southwest 5 to 10 knots. Seas around 1 foot. Isolated showers. SUNDAY NIGHT Southwest to west winds increasing to near 10 knots. Seas around 1 foot. Scattered showers. MONDAY Southwest to west winds 10 to 15 knots, becoming west to northwest near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Scattered showers. MONDAY NIGHT Northwest to north winds near 15 knots, becoming north to northeast 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Scattered showers. TUESDAY Northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. TUESDAY NIGHT North to northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. $$