FZUS52 KKEY 092043 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 443 PM 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. GMZ005-100845- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 443 PM EDT Thu Jul 9 2026 .SYNOPSIS... Moderate to fresh breezes are expected to hold steady through at least Friday night as an Atlantic ridge, draped across Central Florida, strengthens. 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. $$ GMZ031-100845- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 443 PM EDT Thu Jul 9 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots, increasing to 15 to 20 knots. Bay waters a moderate chop, becoming choppy. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Bay waters a moderate chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds near 15 knots, decreasing to 10 to 15 knots. Bay waters a moderate chop, becoming a light to moderate chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY...East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to moderate chop. .SUNDAY...East to southeast winds near 10 knots. Bay waters a light chop. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. .MONDAY...East to southeast winds near 10 knots. Bay waters a light chop. .MONDAY NIGHT...East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. .TUESDAY...East to southeast winds near 10 knots. Bay waters a light chop. .TUESDAY NIGHT...East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. $$ GMZ032-035-100845- 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- 443 PM EDT Thu Jul 9 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots, increasing to 15 to 20 knots. Seas 1 to 2 feet, except 2 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop, becoming choppy. A chance of showers with a slight chance of 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, becoming southeast 10 to 15 knots after midnight. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters choppy, becoming a light to moderate chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Marquesas Keys. Nearshore waters 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, except 2 to 3 feet west of Marquesas Keys. Nearshore waters a light to moderate chop. .SUNDAY...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. .SUNDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. .MONDAY...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. .MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. .TUESDAY...East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. .TUESDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. A slight chance of showers. $$ GMZ042>044-100845- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 443 PM EDT Thu Jul 9 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots early, increasing to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop, becoming choppy. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots, becoming southeast 10 to 15 knots after midnight. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a light to moderate chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. .SUNDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. .SUNDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. .MONDAY...East to southeast winds near 10 knots. Seas around 2 feet. Nearshore waters a light chop. .MONDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. .TUESDAY...East to southeast winds near 10 knots. Seas around 2 feet. Nearshore waters a light chop. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. A slight chance of showers. $$ GMZ052>055-072>075-100845- 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 20NM- 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- 443 PM EDT Thu Jul 9 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots early, increasing to 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East to southeast 4 feet at 6 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing to 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East to southeast 4 feet at 6 seconds. A chance of showers with a slight chance of 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 winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. .SUNDAY...East 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. .TUESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers. $$ GMZ033-034-100845- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 443 PM EDT Thu Jul 9 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. Wave Detail: East to southeast 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY...East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East to southeast 4 feet at 5 seconds. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...East to southeast winds near 15 knots, becoming southeast 10 to 15 knots after midnight. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. .SUNDAY...East to southeast winds near 10 knots. Seas 1 to 2 feet. .SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. .MONDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. .MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2 feet. .TUESDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. .TUESDAY NIGHT...East winds near 10 knots. Seas building to 2 to 3 feet. A slight chance of showers. $$