Hazardous marine condition(s):
Short Term Forecast
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.
$$
GMZ032-035-190245- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1034 AM EDT Thu Jun 18 2026 THIS AFTERNOON Southeast to south winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. A slight chance of showers and thunderstorms this morning. TONIGHT Southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a light chop. A slight chance of showers and thunderstorms. FRIDAY Southeast to south winds 5 to 10 knots, becoming variable near 5 knots in the afternoon. Seas around 1 foot, subsiding to 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. A slight chance of showers and thunderstorms in the morning. FRIDAY NIGHT Variable winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming south to southwest in the afternoon. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY NIGHT Northeast to east winds near 10 knots, becoming east to southeast 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. SUNDAY Southeast to south winds 5 to 10 knots, becoming south to southwest near 5 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. SUNDAY NIGHT East to southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. MONDAY Southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. MONDAY NIGHT East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 foot or less, building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. A slight chance of showers. $$
GMZ032-035-190245- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1034 AM EDT Thu Jun 18 2026 THIS AFTERNOON Southeast to south winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. A slight chance of showers and thunderstorms this morning. TONIGHT Southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a light chop. A slight chance of showers and thunderstorms. FRIDAY Southeast to south winds 5 to 10 knots, becoming variable near 5 knots in the afternoon. Seas around 1 foot, subsiding to 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. A slight chance of showers and thunderstorms in the morning. FRIDAY NIGHT Variable winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY Southeast to south winds 5 to 10 knots, becoming south to southwest in the afternoon. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY NIGHT Northeast to east winds near 10 knots, becoming east to southeast 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. SUNDAY Southeast to south winds 5 to 10 knots, becoming south to southwest near 5 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. SUNDAY NIGHT East to southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. MONDAY Southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. MONDAY NIGHT East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 foot or less, building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. A slight chance of showers. $$