Coastal Waters Forecast
Issued by NWS Key West, FL
Issued by NWS Key West, FL
538 FZUS52 KKEY 161420 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 1020 AM EDT Mon Sep 16 2024 Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef to south of Dry Tortugas, and the extreme southeastern Gulf of Mexico, including The Florida Keys National Marine Sanctuary Seas are given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. Wave Detail will include details about the period and direction of origin for the highest energy waves. Long-period swells coming from a different direction than the wind would be included in the Wave Detail. GMZ005-162100- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1020 AM EDT Mon Sep 16 2024 .SYNOPSIS...Light and generally variable breezes will continue through Friday over the Florida Keys coastal waters. A developing low pressure system off the Carolina coast will generate a higher northerly swell off the Upper Keys for Tuesday and Wednesday. The low will deepen into an upper level trough and slowly slide south towards the Florida Peninsula by Friday. Unpredictability in the movement of this trough means confidence in the extended forecast is very low. The Approximate Shoreward Edge of the Gulf Stream as of September 10... 47 NM South of Dry Tortugas Light...on Loggerhead Key. 27 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 22 NM South of Sand Key Light...off Key West. 19 NM South of Looe Key...off Big Pine Key. 18 NM South of Sombrero Key Light...off Marathon. 10 NM Southeast of Alligator Reef Light...off Islamorada. 6 NM Southeast of Molasses Reef Light...off Key Largo. 4 NM East of Carysfort Reef Light...off Ocean Reef. Gulf Stream Information Courtesy of the Naval Oceanographic Office. $$ GMZ031-162100- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 1020 AM EDT Mon Sep 16 2024 .THIS AFTERNOON...South to southwest winds near 5 knots, becoming variable. Bay waters smooth. Scattered showers and isolated thunderstorms. .TONIGHT...Variable winds near 5 knots. Bay waters smooth. Scattered showers and isolated thunderstorms. .TUESDAY...Variable winds near 5 knots, becoming northeast to east. Bay waters smooth. Scattered showers and thunderstorms. .TUESDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming east to southeast. Bay waters smooth to a light chop. Scattered showers and thunderstorms. .WEDNESDAY...East to southeast winds near 5 knots. Bay waters smooth. Scattered showers and thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds near 5 knots, becoming variable. Bay waters smooth. Scattered showers and thunderstorms. .THURSDAY...Variable winds near 5 knots. Bay waters smooth. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...Northwest winds near 5 knots, becoming west. Bay waters smooth. Scattered showers and isolated thunderstorms. .FRIDAY...Southwest to west winds near 5 knots, becoming south. Bay waters smooth. Scattered showers and isolated thunderstorms. .FRIDAY NIGHT...Southeast to south winds near 5 knots. Bay waters smooth. Scattered showers and isolated thunderstorms. $$ GMZ032-035-162100- Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge- Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1020 AM EDT Mon Sep 16 2024 .THIS AFTERNOON...Southwest winds near 5 knots, becoming variable. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .TONIGHT...Variable winds near 5 knots, becoming east to southeast. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .TUESDAY...Southeast winds near 5 knots, becoming north in the afternoon. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and thunderstorms. .TUESDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms. .WEDNESDAY...East to southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and thunderstorms. .THURSDAY...Northwest to north winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...Northwest to north winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .FRIDAY...Northwest to north winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .FRIDAY NIGHT...North to northeast winds near 5 knots, becoming variable. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. $$ GMZ042>044-162100- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1020 AM EDT Mon Sep 16 2024 .THIS AFTERNOON...Southwest winds near 5 knots, becoming variable. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .TONIGHT...Variable winds near 5 knots, becoming east to southeast. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .TUESDAY...East to southeast winds near 5 knots, becoming variable. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and thunderstorms. .TUESDAY NIGHT...East to southeast winds increasing to 5 to 10 knots. Seas building to around 1 foot. Nearshore waters becoming smooth to a light chop. Scattered showers and thunderstorms. .WEDNESDAY...East to southeast winds near 5 knots, becoming northeast to east. Seas around 1 foot. Nearshore waters smooth. Scattered showers and thunderstorms. .WEDNESDAY NIGHT...Northeast winds near 5 knots, becoming variable. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and thunderstorms. .THURSDAY...Variable winds near 5 knots, becoming northwest to north. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...Northwest to north winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .FRIDAY AND FRIDAY NIGHT...Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Scattered showers and isolated thunderstorms. $$ GMZ052>055-072>075-162100- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 1020 AM EDT Mon Sep 16 2024 .THIS AFTERNOON...South to southwest winds near 5 knots, becoming variable. Seas around 1 foot. Scattered showers and isolated thunderstorms. .TONIGHT...Variable winds near 5 knots, becoming southeast. Seas around 1 foot, except building to 1 to 2 feet off the Upper Keys due to northerly swell. Scattered showers and isolated thunderstorms. .TUESDAY...East to southeast winds near 5 knots, becoming northeast to east in the afternoon. Seas around 1 foot, except 1 to 2 feet off the Upper Keys due to northerly swell. Wave Detail: East 1 foot at 3 seconds. Numerous showers and scattered thunderstorms. .TUESDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming east to southeast. Seas 1 to 2 feet. Scattered showers and thunderstorms. .WEDNESDAY...Southeast winds near 5 knots, becoming variable. Seas subsiding to around 1 foot. Scattered showers and thunderstorms. .WEDNESDAY NIGHT...Variable winds near 5 knots. Seas around 1 foot. Scattered showers and thunderstorms. .THURSDAY...North winds near 5 knots. Seas around 1 foot. Scattered showers and isolated thunderstorms. .THURSDAY NIGHT...North to northeast winds near 5 knots. Seas around 1 foot. Scattered showers and isolated thunderstorms. .FRIDAY...Northwest to north winds near 5 knots. Seas around 1 foot. Scattered showers and isolated thunderstorms. .FRIDAY NIGHT...North to northeast winds near 5 knots, becoming variable. Seas around 1 foot. Scattered showers and isolated thunderstorms. $$ GMZ033-034-162100- Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel- 1020 AM EDT Mon Sep 16 2024 .THIS AFTERNOON...Southwest to west winds near 5 knots, becoming west to northwest. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 4 seconds. Scattered showers and isolated thunderstorms. .TONIGHT...North winds near 5 knots, becoming northeast to east. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 4 seconds. Scattered showers and isolated thunderstorms. .TUESDAY AND TUESDAY NIGHT...East to southeast winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms. .WEDNESDAY...East to southeast winds near 5 knots. Seas 1 foot or less. Scattered showers and thunderstorms. .WEDNESDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot or less. Scattered showers and thunderstorms. .THURSDAY AND THURSDAY NIGHT...North winds near 5 knots. Seas 1 foot or less. Scattered showers and isolated thunderstorms. .FRIDAY...Northwest to north winds near 5 knots. Seas around 1 foot. Scattered showers and isolated thunderstorms. .FRIDAY NIGHT...North to northeast winds near 5 knots. Seas 1 foot or less. Scattered showers and isolated thunderstorms. $$ AJP