GMZ005-090830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
420 PM EDT Thu Oct 8 2026
.SYNOPSIS...Hurricane Isaias, currently over the southwestern
Gulf waters, is expected to move towards the North Gulf Coast over
the next few days, strengthening as it does so. Enhanced swell
generated by the hurricane will increase wave heights in the
western Florida Straits and Gulfside waters tonight through the
first half of the weekend. A stationary front remains draped
across north-central Florida which will slowly drift southward
infringing on the surface ridge to its south. Breezes are expected
to freshen before the weekend in response with moderate to fresh
breezes possible in the western waters. A plume of moisture will
also move into the Florida Keys at the same time and increase
shower and thunderstorm chances.
The Approximate Shoreward Edge of the Gulf Stream as of October
2, 2026...
39 NM south-southeast of Dry Tortugas Light, on Loggerhead Key
14 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
8 NM south-southeast of Sand Key Light, off Key West
2 NM south-southeast of Looe Key, off Big Pine Key
1 NM south-southeast of Sombrero Key Light, off Marathon
0 NM south-southeast of Alligator Reef Light, off Islamorada
2 NM northwest of Molasses Reef Light, off Key Largo
2 NM northwest of Carysfort Reef Light, off Ocean Reef
Gulf Stream Information Courtesy of the Naval Oceanographic Office.
$$
GMZ033-034-090830- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 420 PM EDT Thu Oct 8 2026 TONIGHT Southeast winds 10 to 15 knots, increasing to near 15 knots. Seas around 2 feet, building to 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southwest 2 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY Southeast winds 15 to 20 knots, subsiding to near 15 knots. Seas building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southwest to west 4 feet at 11 seconds and southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT Southeast to south winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East to southeast 4 feet at 4 seconds and southwest to west 4 feet at 10 seconds. Showers likely with a slight chance of thunderstorms. SATURDAY Southeast to south winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Showers likely with a slight chance of thunderstorms. SUNDAY Southeast winds 10 to 15 knots, becoming east to southeast 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT East winds near 10 knots. Seas 1 to 2 feet. MONDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. MONDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. TUESDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers. $$
GMZ033-034-090830- 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- 420 PM EDT Thu Oct 8 2026 TONIGHT Southeast winds 10 to 15 knots, increasing to near 15 knots. Seas around 2 feet, building to 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southwest 2 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY Southeast winds 15 to 20 knots, subsiding to near 15 knots. Seas building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southwest to west 4 feet at 11 seconds and southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT Southeast to south winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East to southeast 4 feet at 4 seconds and southwest to west 4 feet at 10 seconds. Showers likely with a slight chance of thunderstorms. SATURDAY Southeast to south winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Showers likely with a slight chance of thunderstorms. SUNDAY Southeast winds 10 to 15 knots, becoming east to southeast 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT East winds near 10 knots. Seas 1 to 2 feet. MONDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers. MONDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 5 to 10 knots. Seas 1 to 2 feet. TUESDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers. $$