Hazardous marine condition(s):
Small Craft Advisory
GMZ005-201445-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1032 PM EDT Thu Mar 19 2026
.SYNOPSIS...Elongated high pressure over the Eastern Seaboard
interacting with a decaying frontal boundary in the Caribbean
will maintain fresh to occasionally strong breezes tonight.
Breezes will slacken appreciably beginning Friday afternoon, with
light to gentle breezes expected for the weekend into early next
week.
The Approximate Shoreward Edge of the Gulf Stream as of March 16...
36 NM South of Dry Tortugas Light...on Loggerhead Key.
49 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
31 NM South of Sand Key Light...off Key West.
16 NM South of Looe Key...off Big Pine Key.
14 NM Southeast of Sombrero Key Light...off Marathon.
7 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
6 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>075-201445- 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- 1032 PM EDT Thu Mar 19 2026 SMALL CRAFT ADVISORY IN EFFECT TONIGHT North to northeast winds 20 to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 7 seconds and west to northwest 2 feet at 6 seconds. A chance of showers. FRIDAY North to northeast winds 20 to 25 knots, decreasing to near 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. Wave Detail: North to northeast 7 feet at 7 seconds and west to northwest 1 foot at 6 seconds. A slight chance of showers. FRIDAY NIGHT Northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 7 seconds and west to northwest 1 foot at 6 seconds. A slight chance of showers. SATURDAY Northeast winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. SATURDAY NIGHT Northeast to east winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. SUNDAY East winds near 10 knots. Seas 2 to 3 feet. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. MONDAY THROUGH TUESDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. TUESDAY NIGHT Northeast to east winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. $$
GMZ052>055-072>075-201445- 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- 1032 PM EDT Thu Mar 19 2026 SMALL CRAFT ADVISORY IN EFFECT TONIGHT North to northeast winds 20 to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 7 seconds and west to northwest 2 feet at 6 seconds. A chance of showers. FRIDAY North to northeast winds 20 to 25 knots, decreasing to near 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. Wave Detail: North to northeast 7 feet at 7 seconds and west to northwest 1 foot at 6 seconds. A slight chance of showers. FRIDAY NIGHT Northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 7 seconds and west to northwest 1 foot at 6 seconds. A slight chance of showers. SATURDAY Northeast winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. SATURDAY NIGHT Northeast to east winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. SUNDAY East winds near 10 knots. Seas 2 to 3 feet. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. MONDAY THROUGH TUESDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. TUESDAY NIGHT Northeast to east winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. $$