GMZ005-042045-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
433 AM EDT Tue Aug 4 2026
.SYNOPSIS...Light to gentle breezes will return by this afternoon
before wind speeds increase to the gentle to moderate range for
mid to late week as a southeasterly flow pattern develops. In
addition, rain chances will also be increasing by tonight as
deeper moisture spreads into the region ahead of a frontal
boundary approaching northern Florida. As chances for showers and
thunderstorms increase, mariners can expect higher winds and seas
near this activity.
The Approximate Shoreward Edge of the Gulf Stream as of
July 31, 2026...
31 NM South of Dry Tortugas Light...on Loggerhead Key.
24 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
25 NM South of Sand Key Light...off Key West.
2 NM South of Looe Key...off Big Pine Key.
1 NM South of Sombrero Key Light...off Marathon.
5 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
1 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.
$$
GMZ033-034-042045- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 433 AM EDT Tue Aug 4 2026 TODAY South to southwest winds near 5 knots, becoming northwest. Seas around 1 foot. Wave Detail: South 1 foot at 2 seconds and west to northwest 1 foot at 6 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT East winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East 1 foot at 2 seconds and west to northwest 1 foot at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot, building to 1 to 2 feet. Wave Detail: East to southeast 1 foot at 3 seconds and west to northwest 1 foot at 5 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. THURSDAY East winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. FRIDAY East winds 10 to 15 knots, becoming east to southeast. Seas around 2 feet. Showers and thunderstorms likely. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. SATURDAY Southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. $$
GMZ033-034-042045- 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- 433 AM EDT Tue Aug 4 2026 TODAY South to southwest winds near 5 knots, becoming northwest. Seas around 1 foot. Wave Detail: South 1 foot at 2 seconds and west to northwest 1 foot at 6 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT East winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East 1 foot at 2 seconds and west to northwest 1 foot at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot, building to 1 to 2 feet. Wave Detail: East to southeast 1 foot at 3 seconds and west to northwest 1 foot at 5 seconds. Showers likely with a chance of thunderstorms. WEDNESDAY NIGHT East winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. THURSDAY East winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. THURSDAY NIGHT Northeast to east winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. FRIDAY East winds 10 to 15 knots, becoming east to southeast. Seas around 2 feet. Showers and thunderstorms likely. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. SATURDAY Southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. A chance of showers and thunderstorms. $$