Hazardous marine condition(s):
Small Craft Advisory
GMZ005-312130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
426 AM EST Wed Dec 31 2025
.SYNOPSIS...Mainly fresh northwest to north breezes will continue
this morning. Then, high pressure currently over southeast Texas
will slowly weaken as it moves east to southeast into the eastern
Gulf promoting gradually slackening breezes. Once the high moves
overhead towards the end of the week/weekend, breezes become light
and variable.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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.
$$
GMZ052>055-072>075-312130- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 426 AM EST Wed Dec 31 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northwest to north winds near 20 knots, decreasing to near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest to north 5 feet at 6 seconds. TONIGHT Northwest to north winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 7 seconds. THURSDAY North winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: North 3 feet at 6 seconds. THURSDAY NIGHT North winds near 10 knots, becoming north to northeast. Seas around 2 feet. FRIDAY Northeast winds near 5 knots, becoming variable. Seas 1 to 2 feet. FRIDAY NIGHT Variable winds near 5 knots. Seas 1 to 2 feet. SATURDAY Variable winds near 5 knots. Seas 1 to 2 feet. SATURDAY NIGHT Variable winds near 5 knots, becoming southwest to west 5 to 10 knots. Seas 1 to 2 feet. SUNDAY Southwest to west winds near 10 knots, becoming west to northwest near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Isolated showers. SUNDAY NIGHT Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. $$
GMZ052>055-072>075-312130- 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- 426 AM EST Wed Dec 31 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northwest to north winds near 20 knots, decreasing to near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest to north 5 feet at 6 seconds. TONIGHT Northwest to north winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 7 seconds. THURSDAY North winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: North 3 feet at 6 seconds. THURSDAY NIGHT North winds near 10 knots, becoming north to northeast. Seas around 2 feet. FRIDAY Northeast winds near 5 knots, becoming variable. Seas 1 to 2 feet. FRIDAY NIGHT Variable winds near 5 knots. Seas 1 to 2 feet. SATURDAY Variable winds near 5 knots. Seas 1 to 2 feet. SATURDAY NIGHT Variable winds near 5 knots, becoming southwest to west 5 to 10 knots. Seas 1 to 2 feet. SUNDAY Southwest to west winds near 10 knots, becoming west to northwest near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Isolated showers. SUNDAY NIGHT Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. $$