GMZ005-210245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1039 AM EDT Sat Jun 20 2026
.SYNOPSIS...A broad, weak high pressure currently extending from
the central North Atlantic and across the Gulf Basin will fracture
into two cells. This will lead to a weakening pressure field
across the Florida Keys and surrounding coastal waters. As a
result, expect light and variable winds at times starting this
afternoon and continuing through Sunday night. Thereafter, the two
high pressure cells will merge and briefly build, allowing
breezes to freshen slightly Monday and Monday night. The high is
then expected to weaken again with lighter breezes returning
Tuesday.
The Approximate Shoreward Edge of the Gulf Stream as of June 15...
28 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
11 NM South of Sand Key Light...off Key West.
14 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
3 NM East 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.
$$
GMZ033-034-210245- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1039 AM EDT Sat Jun 20 2026 THIS AFTERNOON Southeast to south winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 3 seconds and southwest to west 1 foot at 5 seconds. A slight chance of showers and thunderstorms. TONIGHT North to northeast winds near 5 knots, becoming southeast 5 to 10 knots after midnight. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds and west 1 foot at 5 seconds. SUNDAY Southeast to south winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. Wave Detail: Southeast to south 1 foot at 2 seconds. SUNDAY NIGHT Variable winds near 5 knots. Seas around 1 foot. MONDAY East to southeast winds near 5 knots, becoming northeast to east. Seas 1 foot or less. MONDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY East to southeast winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY NIGHT THROUGH WEDNESDAY NIGHT Northeast to east winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$
GMZ033-034-210245- 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- 1039 AM EDT Sat Jun 20 2026 THIS AFTERNOON Southeast to south winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 3 seconds and southwest to west 1 foot at 5 seconds. A slight chance of showers and thunderstorms. TONIGHT North to northeast winds near 5 knots, becoming southeast 5 to 10 knots after midnight. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds and west 1 foot at 5 seconds. SUNDAY Southeast to south winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. Wave Detail: Southeast to south 1 foot at 2 seconds. SUNDAY NIGHT Variable winds near 5 knots. Seas around 1 foot. MONDAY East to southeast winds near 5 knots, becoming northeast to east. Seas 1 foot or less. MONDAY NIGHT Northeast winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY East to southeast winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. TUESDAY NIGHT THROUGH WEDNESDAY NIGHT Northeast to east winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$