Hazardous marine condition(s):
Short Term Forecast
GMZ005-240230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1027 AM EDT Thu Jul 23 2026
.SYNOPSIS...Mostly gentle to moderate breezes expected today as a
weak easterly wave slowly moves in from the east during the day.
This feature will move east to west across of the Florida Keys
waters, exiting sometime on Friday. Mariners can expect an
increase in coverage of showers and thunderstorms beginning today
and peaking overnight into early Friday. Behind this feature,
breezes will slacken to light to gentle through the first half of
the weekend as a col develops across the region. Thereafter,
breezes will freshen to gentle breezes and back to the west to
northwest as a surface trough develops Sunday. Breezes will return
from the southwest and west as the trough moves east of the
Florida Peninsula early next week.
The Approximate Shoreward Edge of the Gulf Stream as of July 17,
2026...
49 NM South of Dry Tortugas Light...on Loggerhead Key.
51 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
38 NM South of Sand Key Light...off Key West.
22 NM South of Looe Key...off Big Pine Key.
13 NM South of Sombrero Key Light...off Marathon.
6 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.
$$
GMZ033-034-240230- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1027 AM EDT Thu Jul 23 2026 THIS AFTERNOON East winds near 10 knots, becoming northeast to east and briefly decreasing to 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and west to northwest 2 feet at 7 seconds. A chance of showers and thunderstorms. TONIGHT Northeast to east winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 3 seconds and west 2 feet at 7 seconds. Showers likely with a chance of thunderstorms. Winds and seas higher in and around thunderstorms. FRIDAY East winds near 10 knots, becoming east to southeast in the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 4 seconds and west to northwest 2 feet at 7 seconds. Showers likely with a chance of thunderstorms. Winds and seas higher in and around thunderstorms. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming west to northwest near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. A slight chance of showers and thunderstorms. SATURDAY NIGHT Northwest to north winds near 5 knots, becoming west. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY West to northwest winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY NIGHT West to northwest winds near 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. MONDAY West to northwest winds near 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. MONDAY NIGHT Southwest to west winds 5 to 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. $$
GMZ033-034-240230- 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- 1027 AM EDT Thu Jul 23 2026 THIS AFTERNOON East winds near 10 knots, becoming northeast to east and briefly decreasing to 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and west to northwest 2 feet at 7 seconds. A chance of showers and thunderstorms. TONIGHT Northeast to east winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 3 seconds and west 2 feet at 7 seconds. Showers likely with a chance of thunderstorms. Winds and seas higher in and around thunderstorms. FRIDAY East winds near 10 knots, becoming east to southeast in the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 4 seconds and west to northwest 2 feet at 7 seconds. Showers likely with a chance of thunderstorms. Winds and seas higher in and around thunderstorms. FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming west to northwest near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. A slight chance of showers and thunderstorms. SATURDAY NIGHT Northwest to north winds near 5 knots, becoming west. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY West to northwest winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SUNDAY NIGHT West to northwest winds near 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. MONDAY West to northwest winds near 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. MONDAY NIGHT Southwest to west winds 5 to 10 knots. Seas around 1 foot. A chance of showers and thunderstorms. $$