GMZ005-210300-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
915 AM EST Thu Nov 20 2025
.SYNOPSIS...A high pressure system stretching from the western
Atlantic to the Florida panhandle will consolidate along the
Atlantic Coast over the next couple of days, leading to a brief
strengthening of northeast to easterly breezes tonight. This high
will lengthen out into the Atlantic through the remainder of the
week and result in slight slackening to light to gentle by the
weekend. Expect slightly fresher breezes south of the island
chain. Breezes will gradually freshen early next week as the ridge
is reinforced by a continental advancing into the eastern United
States.
The Approximate Shoreward Edge of the Gulf Stream as of November 14...
54 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
19 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
4 NM Southeast of Alligator Reef Light...off Islamorada.
1 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.
$$
GMZ052>055-072>075-210300- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 915 AM EST Thu Nov 20 2025 THIS AFTERNOON Northeast to east winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. TONIGHT East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. FRIDAY East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. FRIDAY NIGHT Northeast to east winds decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. SATURDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. SATURDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY Northeast winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet. $$
GMZ052>055-072>075-210300- 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- 915 AM EST Thu Nov 20 2025 THIS AFTERNOON Northeast to east winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. TONIGHT East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. FRIDAY East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. FRIDAY NIGHT Northeast to east winds decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. SATURDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. SATURDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY Northeast winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet. $$