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.
$$
GMZ033-034-210345- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1042 AM EST Tue Jan 20 2026 SMALL CRAFT ADVISORY IN EFFECT THIS AFTERNOON Northeast near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northwest to north 6 feet at 7 seconds. TONIGHT Northeast winds 20 to 25 knots. Seas 4 to 7 feet, occasionally to 8 feet. Wave Detail: North 6 feet at 6 seconds. WEDNESDAY Northeast to east winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 7 feet, occasionally to 8 feet, subsiding to 3 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast 5 feet at 5 seconds. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 5 feet, occasionally to 6 feet. Isolated showers. THURSDAY Northeast to east winds near 15 knots, becoming northeast near 10 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 1 to 3 feet. Isolated showers. THURSDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Isolated showers. FRIDAY East winds near 10 knots. Seas 1 to 2 feet. Isolated showers. FRIDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 1 to 2 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers. $$
GMZ033-034-210345- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1042 AM EST Tue Jan 20 2026 SMALL CRAFT ADVISORY IN EFFECT THIS AFTERNOON Northeast near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northwest to north 6 feet at 7 seconds. TONIGHT Northeast winds 20 to 25 knots. Seas 4 to 7 feet, occasionally to 8 feet. Wave Detail: North 6 feet at 6 seconds. WEDNESDAY Northeast to east winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 7 feet, occasionally to 8 feet, subsiding to 3 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast 5 feet at 5 seconds. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 5 feet, occasionally to 6 feet. Isolated showers. THURSDAY Northeast to east winds near 15 knots, becoming northeast near 10 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 1 to 3 feet. Isolated showers. THURSDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Isolated showers. FRIDAY East winds near 10 knots. Seas 1 to 2 feet. Isolated showers. FRIDAY NIGHT Northeast to east winds near 10 knots. Seas 1 to 2 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 1 to 2 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers. $$