GMZ005-230830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
426 PM EDT Thu Oct 22 2026
.SYNOPSIS...
High pressure centered just north of the Great Lakes region will
continue to slide eastward and strengthen over the next several
days. The high will interact with a developing disturbance in the
eastern Caribbean, supporting freshening northeasterly breezes
over the next several days. Breezes will peak Sunday night through
Monday night, when strong to near gale breezes will be possible.
The freshening breezes and a surge of moisture may also support
elevated rain and isolated strong thunderstorm chances Friday
night through Monday.
The Approximate Shoreward Edge of the Gulf Stream as of October
19, 2026...
46 NM south of Dry Tortugas Light, on Loggerhead Key
18 NM north of Cosgrove Shoal Light, off the Marquesas Keys
12 NM north of Sand Key Light, off Key West
7 NM north-northwest of Looe Key, off Big Pine Key
5 NM southeast of Sombrero Key Light, off Marathon
2 NM south-southeast of Alligator Reef Light, off Islamorada
2 NM northwest of Molasses Reef Light, off Key Largo
3 NM northwest of Carysfort Reef Light, off Ocean Reef
Gulf Stream Information Courtesy of the Naval Oceanographic
Office.
$$
GMZ033-034-230830- 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- 426 PM EDT Thu Oct 22 2026 SMALL CRAFT SHOULD EXERCISE CAUTION TONIGHT Northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 5 seconds. A slight chance of showers. FRIDAY Northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 5 seconds. A slight chance of showers and thunderstorms. FRIDAY NIGHT Northeast winds 15 to 20 knots, increasing to near 20 knots. Seas building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 6 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT North to northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY Northeast winds 20 to 25 knots, increasing to near 25 knots. Seas building to 7 to 10 feet, occasionally to 13 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT Northeast winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. A slight chance of showers and thunderstorms. MONDAY Northeast winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT Northeast winds 25 to 30 knots. Seas 5 to 8 feet, occasionally to 10 feet. A slight chance of showers. TUESDAY Northeast winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. A slight chance of showers and thunderstorms. TUESDAY NIGHT Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers. $$
GMZ033-034-230830- 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- 426 PM EDT Thu Oct 22 2026 SMALL CRAFT SHOULD EXERCISE CAUTION TONIGHT Northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 5 seconds. A slight chance of showers. FRIDAY Northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 5 seconds. A slight chance of showers and thunderstorms. FRIDAY NIGHT Northeast winds 15 to 20 knots, increasing to near 20 knots. Seas building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 6 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT North to northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY Northeast winds 20 to 25 knots, increasing to near 25 knots. Seas building to 7 to 10 feet, occasionally to 13 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT Northeast winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. A slight chance of showers and thunderstorms. MONDAY Northeast winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT Northeast winds 25 to 30 knots. Seas 5 to 8 feet, occasionally to 10 feet. A slight chance of showers. TUESDAY Northeast winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. A slight chance of showers and thunderstorms. TUESDAY NIGHT Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers. $$