GMZ005-232030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EDT Thu Apr 23 2026
.SYNOPSIS...High pressure over the western North Atlantic will
maintain moderate to fresh easterly breezes early this morning
before slackening to mainly moderate breezes towards the late
morning and afternoon. As the high continues to slowly migrate
farther into the western North Atlantic, breezes will continue to
slowly slacken as well as shift to the east to southeast. Weak
high pressure maintains control over the weekend into early next
week promoting light to gentle east to southeast breezes.
The Approximate Shoreward Edge of the Gulf Stream as of April 22...
19 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
8 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
19 NM Southeast of Sombrero Key Light...off Marathon.
24 NM Southeast of Alligator Reef Light...off Islamorada.
26 NM Southeast of Molasses Reef Light...off Key Largo.
14 NM Southeast of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT and RTOFS.
$$
GMZ042>044-232030- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 429 AM EDT Thu Apr 23 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TODAY East winds 15 to 20 knots early, decreasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy, becoming a moderate chop. A chance of showers with a slight chance of thunderstorms. TONIGHT East to southeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Showers likely with a slight chance of thunderstorms. FRIDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 2 feet. Nearshore waters a light chop. A slight chance of showers. SATURDAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. A slight chance of showers. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY NIGHT East winds near 5 knots. Seas around 1 foot. Nearshore waters smooth. MONDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. MONDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$
GMZ042>044-232030- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 429 AM EDT Thu Apr 23 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TODAY East winds 15 to 20 knots early, decreasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy, becoming a moderate chop. A chance of showers with a slight chance of thunderstorms. TONIGHT East to southeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Showers likely with a slight chance of thunderstorms. FRIDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 2 feet. Nearshore waters a light chop. A slight chance of showers. SATURDAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. A slight chance of showers. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY NIGHT East winds near 5 knots. Seas around 1 foot. Nearshore waters smooth. MONDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. MONDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$