Hazardous marine condition(s):
Small Craft Advisory
GMZ005-210345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1042 AM EST Tue Jan 20 2026
.SYNOPSIS...An expansive high pressure system will move
across the eastern United States over the next several days,
leading to a strengthening pressure gradient. This will continue
to promote bouts of fresh to strong breezes throughout the work
week. The high will move out into the western North Atlantic mid-
late week while weakening. This will support slackening breezes
for Friday night and Saturday.
The Approximate Shoreward Edge of the Gulf Stream as of January
18...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
16 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
12 NM Southeast of Alligator Reef Light...off Islamorada.
7 NM Southeast of Molasses Reef Light...off Key Largo.
4 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 and RTOFS.
$$
GMZ052>055-072>075-210345- 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- 1042 AM EST Tue Jan 20 2026 SMALL CRAFT ADVISORY IN EFFECT THIS AFTERNOON North to northeast winds 20 to 25 knots, becoming northeast. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast 8 feet at 7 seconds and west to northwest 2 feet at 7 seconds. Isolated showers. TONIGHT Northeast winds near 25 knots, becoming northeast to east. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast 9 feet at 8 seconds. Isolated showers. WEDNESDAY Northeast to east winds 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 9 feet at 8 seconds. Scattered showers. WEDNESDAY NIGHT Northeast to east winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. Scattered showers. THURSDAY Northeast to east winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to 5 feet. Scattered showers. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. FRIDAY THROUGH SATURDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. $$
GMZ052>055-072>075-210345- 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- 1042 AM EST Tue Jan 20 2026 SMALL CRAFT ADVISORY IN EFFECT THIS AFTERNOON North to northeast winds 20 to 25 knots, becoming northeast. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast 8 feet at 7 seconds and west to northwest 2 feet at 7 seconds. Isolated showers. TONIGHT Northeast winds near 25 knots, becoming northeast to east. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast 9 feet at 8 seconds. Isolated showers. WEDNESDAY Northeast to east winds 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 9 feet at 8 seconds. Scattered showers. WEDNESDAY NIGHT Northeast to east winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. Scattered showers. THURSDAY Northeast to east winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to 5 feet. Scattered showers. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. FRIDAY THROUGH SATURDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. $$