GMZ005-180230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1022 AM EDT Fri Jul 17 2026
.SYNOPSIS...
A weak surface trough near the northeastern Gulf and northern
Florida will maintain a split ridge pattern across Florida for the
next several days. The Keys will either be within a col region
south of the broad surface trough, or within the southern quadrant
of the trough. Thus, breezes across the Florida Keys will be
variable at times, or take on a southerly component. Our forecast
takes the middle ground and is an average of the two scenarios.
The Approximate Shoreward Edge of the Gulf Stream as of
July 12...
63 NM South of Dry Tortugas Light...on Loggerhead Key.
38 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
21 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
12 NM South of Sombrero Key Light...off Marathon.
7 NM Southeast of Alligator Reef Light...off Islamorada.
3 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, using data from RTOFS and NASA SPoRT SST.
$$
GMZ033-034-180230- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1022 AM EDT Fri Jul 17 2026 THIS AFTERNOON Variable winds near 5 knots, becoming northwest to north. Seas 1 to 2 feet. Wave Detail: Northwest to north 2 feet at 4 seconds. A chance of showers and thunderstorms. TONIGHT Northwest to north winds near 5 knots, becoming southeast to south after midnight. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 5 seconds. A chance of showers and thunderstorms. SATURDAY South to southwest winds 5 to 10 knots, becoming south. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 5 seconds. A chance of showers and thunderstorms. SATURDAY NIGHT Southeast to south winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. SUNDAY South to southwest winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT South to southwest winds 5 to 10 knots, becoming south and increasing to near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. MONDAY South winds near 10 knots, becoming southwest and decreasing to 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT South winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers. TUESDAY Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. TUESDAY NIGHT Southeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers. $$
GMZ033-034-180230- 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 AM EDT Fri Jul 17 2026 THIS AFTERNOON Variable winds near 5 knots, becoming northwest to north. Seas 1 to 2 feet. Wave Detail: Northwest to north 2 feet at 4 seconds. A chance of showers and thunderstorms. TONIGHT Northwest to north winds near 5 knots, becoming southeast to south after midnight. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 5 seconds. A chance of showers and thunderstorms. SATURDAY South to southwest winds 5 to 10 knots, becoming south. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 5 seconds. A chance of showers and thunderstorms. SATURDAY NIGHT Southeast to south winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. SUNDAY South to southwest winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY NIGHT South to southwest winds 5 to 10 knots, becoming south and increasing to near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. MONDAY South winds near 10 knots, becoming southwest and decreasing to 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT South winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers. TUESDAY Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. TUESDAY NIGHT Southeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers. $$