GMZ005-190245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1034 AM EDT Thu Jun 18 2026
.SYNOPSIS...A weak high pressure system in the central North
Atlantic will support a brief cycle of peaks and lulls over the
next day or so. Then a weak frontal boundary will approach the
Florida Peninsula, acting to weaken the high, and supporting a
return to light to gentle breezes. Breezes may become light and
variable at times, Sunday through Monday, especially across the
nearshore and offshore waters north of the island chain.
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.
$$
GMZ033-034-190245- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1034 AM EDT Thu Jun 18 2026 THIS AFTERNOON Southeast to south winds near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: South 2 feet at 4 seconds. A slight chance of showers and thunderstorms. TONIGHT Southeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: South 2 feet at 4 seconds. FRIDAY Southeast to south winds near 10 knots, becoming southwest to west 5 to 10 knots in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. Wave Detail: South 1 foot at 4 seconds. A slight chance of showers and thunderstorms in the morning. FRIDAY NIGHT North to northeast winds 5 to 10 knots, becoming east to southeast. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming southwest to west. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY NIGHT North to northeast winds 5 to 10 knots, becoming east to southeast. Seas around 1 foot. SUNDAY Southeast winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. SUNDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. MONDAY Variable winds near 5 knots. Seas 1 foot or less. MONDAY NIGHT Variable winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas around 1 foot. A slight chance of showers. $$
GMZ033-034-190245- 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- 1034 AM EDT Thu Jun 18 2026 THIS AFTERNOON Southeast to south winds near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: South 2 feet at 4 seconds. A slight chance of showers and thunderstorms. TONIGHT Southeast winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: South 2 feet at 4 seconds. FRIDAY Southeast to south winds near 10 knots, becoming southwest to west 5 to 10 knots in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. Wave Detail: South 1 foot at 4 seconds. A slight chance of showers and thunderstorms in the morning. FRIDAY NIGHT North to northeast winds 5 to 10 knots, becoming east to southeast. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming southwest to west. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY NIGHT North to northeast winds 5 to 10 knots, becoming east to southeast. Seas around 1 foot. SUNDAY Southeast winds 5 to 10 knots, becoming variable near 5 knots. Seas around 1 foot. SUNDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. MONDAY Variable winds near 5 knots. Seas 1 foot or less. MONDAY NIGHT Variable winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas around 1 foot. A slight chance of showers. $$