GMZ005-140830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 PM EDT Wed May 13 2026
.SYNOPSIS...A developing area of low pressure along a frontal
boundary stretching across central Florida and a well-defined
high pressure system over the North Atlantic will interact to
support a wind surge over the Keys marine zones this evening. A
waning pressure pattern will support slackening breezes by late
Thursday. High pressure developing over the Southeast will slide
into the western North Atlantic over the weekend through Monday
night. The location of this feature will support freshening
easterly breezes by early next week.
The Approximate Shoreward Edge of the Gulf Stream as of May 12...
35 NM South of Dry Tortugas Light...on Loggerhead Key.
9 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
6 NM South of Sand Key Light...off Key West.
7 NM South of Looe Key...off Big Pine Key.
6 NM Southeast of Sombrero Key Light...off Marathon.
6 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
3 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.
$$
GMZ032-035-140830- 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- 418 PM EDT Wed May 13 2026 TONIGHT West winds near 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop. A chance of showers with a slight chance of thunderstorms. THURSDAY West to northwest winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming smooth to a light chop. FRIDAY Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. FRIDAY NIGHT Variable winds near 5 knots, becoming east to southeast. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms. SATURDAY East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY NIGHT East to southeast winds near 10 knots, increasing to 10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. A slight chance of showers and thunderstorms. SUNDAY East winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet, except building to around 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a moderate chop. A slight chance of showers and thunderstorms. SUNDAY NIGHT East winds near 15 knots. Seas 1 to 2 feet, except around 2 feet west of the Marquesas Keys. Nearshore waters a moderate chop. A slight chance of showers and thunderstorms. MONDAY East winds near 15 knots. Seas 1 to 2 feet, except around 2 feet west of the Marquesas. Nearshore waters a moderate chop. A slight chance of showers and thunderstorms. MONDAY NIGHT East winds 15 to 20 knots. Seas around 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters choppy. A chance of showers with a slight chance of thunderstorms. $$
GMZ032-035-140830- 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- 418 PM EDT Wed May 13 2026 TONIGHT West winds near 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop. A chance of showers with a slight chance of thunderstorms. THURSDAY West to northwest winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming smooth to a light chop. FRIDAY Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. FRIDAY NIGHT Variable winds near 5 knots, becoming east to southeast. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms. SATURDAY East to southeast winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. SATURDAY NIGHT East to southeast winds near 10 knots, increasing to 10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. A slight chance of showers and thunderstorms. SUNDAY East winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet, except building to around 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a moderate chop. A slight chance of showers and thunderstorms. SUNDAY NIGHT East winds near 15 knots. Seas 1 to 2 feet, except around 2 feet west of the Marquesas Keys. Nearshore waters a moderate chop. A slight chance of showers and thunderstorms. MONDAY East winds near 15 knots. Seas 1 to 2 feet, except around 2 feet west of the Marquesas. Nearshore waters a moderate chop. A slight chance of showers and thunderstorms. MONDAY NIGHT East winds 15 to 20 knots. Seas around 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters choppy. A chance of showers with a slight chance of thunderstorms. $$