Hazardous marine condition(s):
Small Craft Advisory
GMZ005-281430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1022 PM EDT Tue Oct 27 2026
.SYNOPSIS...
A tight pressure gradient between high pressure over the Eastern
Seaboard and a low pressure system near the Bahamas will support
strong breezes tonight. As the low slides westward towards the
Keys, breezes will abruptly slacken on Wednesday. The low will
slide into the central Gulf and weaken later this week, as another
high pressure system takes over the pressure field through the
weekend. This will support light to gentle northeast to east
breezes through Sunday night.
The Approximate Shoreward Edge of the Gulf Stream as of October 27, 2026...
19 NM south of Dry Tortugas Light, on Loggerhead Key
34 NM south of Cosgrove Shoal Light, off the Marquesas Keys
28 NM south of Sand Key Light, off Key West
38 NM south of Looe Key, off Big Pine Key
31 NM southeast of Sombrero Key Light, off Marathon
17 NM south-southeast of Alligator Reef Light, off Islamorada
10 NM southeast of Molasses Reef Light, off Key Largo
10 NM northwest of Carysfort Reef Light, off Ocean Reef
Gulf Stream Information Courtesy of the National Weather Service in
Key West, using data from RTOFS and NASA SPoRT SST.
$$
GMZ033-034-281430- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1022 PM EDT Tue Oct 27 2026 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT North to northeast winds near 25 knots, decreasing to near 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 6 feet at 6 seconds. A slight chance of showers and thunderstorms. WEDNESDAY North to northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 6 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Northeast winds 10 to 15 knots, becoming northeast to east 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest to north 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. THURSDAY East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. A chance of showers. THURSDAY NIGHT East winds near 10 knots, increasing to 10 to 15 knots. Seas around 2 feet. A slight chance of showers. FRIDAY Northeast to east winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. A slight chance of showers. FRIDAY NIGHT East winds 10 to 15 knots. Seas 1 to 2 feet. SATURDAY East winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. SUNDAY East winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY NIGHT Northeast winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$
GMZ033-034-281430- 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- 1022 PM EDT Tue Oct 27 2026 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT North to northeast winds near 25 knots, decreasing to near 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 6 feet at 6 seconds. A slight chance of showers and thunderstorms. WEDNESDAY North to northeast winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 6 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Northeast winds 10 to 15 knots, becoming northeast to east 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest to north 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. THURSDAY East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. A chance of showers. THURSDAY NIGHT East winds near 10 knots, increasing to 10 to 15 knots. Seas around 2 feet. A slight chance of showers. FRIDAY Northeast to east winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. A slight chance of showers. FRIDAY NIGHT East winds 10 to 15 knots. Seas 1 to 2 feet. SATURDAY East winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. SUNDAY East winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY NIGHT Northeast winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$