FZUS52 KKEY 091419 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 1019 AM EDT Thu Jul 9 2026 Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef to south of Dry Tortugas, and the extreme southeastern Gulf of America, 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. GMZ005-100230- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1019 AM EDT Thu Jul 9 2026 .SYNOPSIS... Breezes will briefly lull for the remainder of the morning and into the early afternoon, and then freshen back to moderate to fresh east to southeast breezes this evening. Moderate to fresh breezes expected to hold steady through at least Friday night as an Atlantic ridge draped across Central Florida strengthens, and marine caution headlines are in place for all local waters excluding Florida Bay. Winds will tend to peak in the evenings and lull slightly during the day. Breezes are expected to ease back gradually through the weekend. Shower and thunder chances will be slight or less over the next few days, but trend sharply upwards late in the week as a weak low level trough pushes westward across our area. The Approximate Shoreward Edge of the Gulf Stream as of July 5... 51 NM Southeast of Dry Tortugas Light...on Loggerhead Key. 15 NM Southeast of Cosgrove Shoal Light...off the Marquesas Keys. 6 NM South of Sand Key Light...off Key West. 6 NM South of Looe Key...off Big Pine Key. 6 NM Southeast of Sombrero Key Light...off Marathon. 7 NM Southeast of Alligator Reef Light...off Islamorada. 6 NM Southeast of Molasses Reef Light...off Key Largo. 4 NM Southeast 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. $$ GMZ031-100230- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 1019 AM EDT Thu Jul 9 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. .TONIGHT...East to southeast winds near 15 knots early, increasing to 15 to 20 knots. Bay waters a moderate chop, becoming choppy. A slight chance of showers and thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Bay waters a moderate chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds 15 knots. Bay waters a moderate chop. A chance of showers and thunderstorms. .SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15 knots. Bay waters a moderate chop, becoming a light to moderate chop. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. .SUNDAY AND SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. .MONDAY...Southeast winds near 10 knots. Bay waters a light chop. .MONDAY NIGHT...East to southeast winds near 10 knots. Bay waters a light chop. $$ GMZ032-035-100230- 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- 1019 AM EDT Thu Jul 9 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. .TONIGHT...East to southeast winds near 15 knots early, increasing to 15 to 20 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a moderate chop, becoming choppy. A chance of showers and thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a moderate chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters choppy, becoming a moderate chop. A chance of showers and thunderstorms. .SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas around 1 foot, except building to 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. .SUNDAY AND SUNDAY NIGHT...East to southeast winds near 10 knots. Seas near 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. .MONDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or less, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop. .MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 foot or less, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. $$ GMZ042>044-100230- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1019 AM EDT Thu Jul 9 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. .TONIGHT...East to southeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy. A chance of showers and thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a moderate chop. A chance of showers and thunderstorms. .SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. .SUNDAY THROUGH MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. $$ GMZ052>055-072>075-100230- 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- 1019 AM EDT Thu Jul 9 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots, increasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. A slight chance of showers and thunderstorms. .TONIGHT...East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at5 seconds. A chance of showers and thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots, becoming southeast near 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms. .SATURDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. .SUNDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. .MONDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. .MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. $$ GMZ033-034-100230- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1019 AM EDT Thu Jul 9 2026 .THIS AFTERNOON...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 2 feet at 4 seconds. A slight chance of showers and thunderstorms. .TONIGHT...East to southeast winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A chance of showers and thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms. .SATURDAY...Southeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. .SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. .MONDAY AND MONDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. $$ SD/LIW