Coastal Waters Forecast
Issued by NWS Key West, FL
Issued by NWS Key West, FL
386 FZUS52 KKEY 040230 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 1030 PM EDT Wed Jun 3 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. GMZ005-041430- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1030 PM EDT Wed Jun 3 2026 .SYNOPSIS...The combination of a robust eastern United States surface high, a deepening Gulf low, and a weak frontal boundary draped across the Keys will keep breezes moderate to fresh for the next few hours, especially across the SE Gulf and Straits of Florida. Uncertainty remains high, and periods of higher breezes will be possible. Additional perturbations are likely due to an expected increase in convective activity along the frontal boundary. Shower and thunderstorm chances will remain quite elevated through much of the remainder of the week. The threat of periods of higher breezes will remain. Rain chances should trend downwards towards normal through the weekend as drier air moves in and breezes diminish. The Approximate Shoreward Edge of the Gulf Stream as of May 30... 35 NM South of Dry Tortugas Light...on Loggerhead Key. 11 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 10 NM South of Sand Key Light..modestly.off Key West. 7 NM South of Looe Key...off Big Pine Key. 7 NM Southeast of Sombrero Key Light...off Marathon. 6 NM Southeast of Alligator Reef Light...off Islamorada. 2 NM Southeast of Molasses Reef Light...off Key Largo. 1 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. $$ GMZ031-041430- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 1030 PM EDT Wed Jun 3 2026 .OVERNIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Bay waters a moderate chop, becoming a light to moderate chop. Showers likely with a chance of thunderstorms. .THURSDAY...Northeast to east winds near 10 knots, increasing to near 15 knots. Bay waters a light chop, becoming a moderate chop. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast to east winds near 15 knots. Bay waters a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY...Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Bay waters a light to moderate chop, becoming a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...Northeast to east winds decreasing to 10 to 15 knots. Bay waters becoming a light to moderate chop. A chance of thunderstorms with a slight chance of showers. .SATURDAY...Northeast to east winds near 10 knots, becoming east. Bay waters a light chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming east near 10 knots. Bay waters a light to moderate chop, becoming a light chop. A chance of showers and thunderstorms. .SUNDAY...East winds 5 to 10 knots, becoming southeast near 10 knots. Bay waters smooth to a light chop, becoming a light chop. A chance of showers and thunderstorms. .SUNDAY NIGHT...Southeast to south winds near 10 knots. Bay waters a light chop. A chance of showers and thunderstorms. .MONDAY...South winds near 5 knots, becoming southeast to south in the afternoon. Bay waters smooth. A chance of showers and thunderstorms. .MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay waters smooth to a light chop. A chance of showers and thunderstorms. $$ GMZ032-035-041430- 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- 1030 PM EDT Wed Jun 3 2026 .OVERNIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. Showers likely with a chance of thunderstorms. .THURSDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast to east winds increasing to near 15 knots. Seas 1 to 2 feet. Nearshore waters becoming a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY...East winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters becoming a light to moderate chop. A chance of showers and thunderstorms. .SATURDAY...Northeast to east winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...East winds near 10 knots, becoming east to southeast 5 to 10 knots. Seas 1 foot or less. Nearshore waters a light chop, becoming smooth to a light chop. A chance of showers and thunderstorms. .SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...Southeast winds near 10 knots. Seas 1 foot or less. Nearshore waters a light chop. A chance of showers and thunderstorms. .MONDAY...Southeast to south winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms. .MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A chance of showers and thunderstorms. $$ GMZ042>044-041430- 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- 1030 PM EDT Wed Jun 3 2026 .OVERNIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. Showers with a chance of thunderstorms. .THURSDAY...Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY...East winds 10 to 15 knots, increasing to near 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters becoming a light to moderate chop. A chance of showers and thunderstorms. .SATURDAY...Northeast to east winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. A slight chance of showers and thunderstorms. .SUNDAY...East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...Southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. A chance of showers with a slight chance of thunderstorms. .MONDAY...Southeast to south winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. A slight chance of showers and thunderstorms. .MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. A chance of showers and thunderstorms. $$ GMZ052>055-072>075-041430- 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- 1030 PM EDT Wed Jun 3 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE... .OVERNIGHT...Northeast to east winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet. Wave Detail: Northeast to east 3 feet at 4 seconds. Showers likely with a chance of thunderstorms. .THURSDAY...East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Showers likely with a chance of thunderstorms. .THURSDAY NIGHT...Northeast to east winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 3 feet at 5 seconds. Showers likely with a chance of thunderstorms. .FRIDAY...East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms. .SATURDAY...Northeast to east winds near 10 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...East winds near 10 knots, becoming southeast 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. .SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...Southeast winds near 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. .MONDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms. .MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet, building to 2 to 3 feet after midnight. A chance of showers with a slight chance of thunderstorms. $$ GMZ033-034-041430- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1030 PM EDT Wed Jun 3 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE... .OVERNIGHT...Northeast to east winds 15 to 20 knots, decreasing to 10 to 15 knots late. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds. Showers with a chance of thunderstorms. .THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast to east winds increasing to near 15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northeast to east 3 feet at 4 seconds. Showers likely with a chance of thunderstorms. .FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. .SATURDAY...East winds 10 to 15 knots, becoming northeast to east 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...East winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. .SUNDAY...East winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. .MONDAY...Southeast to south winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. .MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 foot or less, then 1 foot or less after midnight. A chance of showers and thunderstorms. $$ MJV