GMZ005-100830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 PM EDT Fri Oct 9 2026
.SYNOPSIS...
Hurricane Isaias intensified to a Category 3 hurricane. The
hurricane is forecast to make landfall in northern Florida
tonight. Fresh breezes were able to develop over the northwestern
waters on the periphery of the hurricane. Elevated swells will
persist through the Florida Straits and the outer Gulf waters
through the first half of the weekend. Breezes are on track to
decrease while Hurricane Isaias moves north. Meanwhile, a plume
of moisture will move north from eastern Cuba tonight through this
weekend. Expect an increase in shower and thunderstorm chances.
Breezes will be able to slacken during the first half of the
weekend.
The Approximate Shoreward Edge of the Gulf Stream as of October 9,
2026...
53 NM south-southeast of Dry Tortugas Light, on Loggerhead Key
33 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
24 NM south-southeast of Sand Key Light, off Key West
19 NM south-southeast of Looe Key, off Big Pine Key
13 NM south-southeast of Sombrero Key Light, off Marathon
5 NM south-southeast of Alligator Reef Light, off Islamorada
2 NM east of Molasses Reef Light, off Key Largo
2 NM east of Carysfort Reef Light, off Ocean Reef
Gulf Stream Information Courtesy of the Naval Oceanographic
Office.
$$
GMZ033-034-100830- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 417 PM EDT Fri Oct 9 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TONIGHT Southeast to south winds 15 to 20 knots, decreasing to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southwest to west 5 feet at 10 seconds and southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY Southeast to south winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 4 feet at 10 seconds and southeast to south 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT Southeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West to northwest 3 feet at 10 seconds and southeast 2 feet at 3 seconds. Showers likely with a slight chance of thunderstorms. SUNDAY East to southeast winds near 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT Northeast to east winds near 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. MONDAY Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 10 to 15 knots. Seas 2 to 3 feet. TUESDAY NIGHT Northeast winds 10 to 15 knots. Seas around 2 feet. A slight chance of showers. WEDNESDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. WEDNESDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. $$
GMZ033-034-100830- 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- 417 PM EDT Fri Oct 9 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TONIGHT Southeast to south winds 15 to 20 knots, decreasing to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southwest to west 5 feet at 10 seconds and southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY Southeast to south winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 4 feet at 10 seconds and southeast to south 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT Southeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West to northwest 3 feet at 10 seconds and southeast 2 feet at 3 seconds. Showers likely with a slight chance of thunderstorms. SUNDAY East to southeast winds near 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT Northeast to east winds near 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. MONDAY Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 10 to 15 knots. Seas 2 to 3 feet. TUESDAY NIGHT Northeast winds 10 to 15 knots. Seas around 2 feet. A slight chance of showers. WEDNESDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. WEDNESDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. $$