GMZ005-010930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
424 PM EST Sun Nov 30 2025
.SYNOPSIS...High pressure across the New England region will
progress further east through Monday and breezes will continue to
slacken as well as shift to the east. Another high will take the
place of this previous high for Monday night and early Tuesday
keeping breezes gentle to moderate. A developing storm system on
the heels of this high Tuesday will result in a weakening of the
pressure gradient across the Keys through early Wednesday. Its
corresponding cold front may try and push 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.
$$
GMZ052>055-072>075-010930- 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- 424 PM EST Sun Nov 30 2025 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE TONIGHT Northeast to east winds near 15 knots. Seas 4 to 6 feet, occasionally to 7 feet early, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 7 seconds. Scattered showers. MONDAY East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers. MONDAY NIGHT East to southeast winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 4 feet at 5 seconds. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming southwest near 10 knots. Seas 2 to 3 feet, subsiding to around 2 feet. TUESDAY NIGHT West to northwest winds near 10 knots, becoming northwest to north 5 to 10 knots. Seas subsiding to 1 to 2 feet. Isolated showers. WEDNESDAY North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. WEDNESDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Halfmoon Shoal Light. THURSDAY Northeast to east winds increasing to 10 to 15 knots. Seas 2 to 3 feet. THURSDAY NIGHT Northeast to east winds increasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. FRIDAY East to southeast winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas subsiding to 2 to 3 feet. $$
GMZ052>055-072>075-010930- 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- 424 PM EST Sun Nov 30 2025 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE TONIGHT Northeast to east winds near 15 knots. Seas 4 to 6 feet, occasionally to 7 feet early, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 7 seconds. Scattered showers. MONDAY East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers. MONDAY NIGHT East to southeast winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 4 feet at 5 seconds. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming southwest near 10 knots. Seas 2 to 3 feet, subsiding to around 2 feet. TUESDAY NIGHT West to northwest winds near 10 knots, becoming northwest to north 5 to 10 knots. Seas subsiding to 1 to 2 feet. Isolated showers. WEDNESDAY North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. WEDNESDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Halfmoon Shoal Light. THURSDAY Northeast to east winds increasing to 10 to 15 knots. Seas 2 to 3 feet. THURSDAY NIGHT Northeast to east winds increasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. FRIDAY East to southeast winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas subsiding to 2 to 3 feet. $$