FZUS52 KKEY 150820 CCA CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 414 AM EDT Wed Apr 15 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. GMZ005-152015- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 414 AM EDT Wed Apr 15 2026 .SYNOPSIS...A high pressure system over the central North Atlantic will maintain moderate northeast to east breezes (except moderate to occasionally fresh Florida Straits) today and tonight. Occasional fast- moving light showers cannot be ruled out, especially in the overnight periods. Breezes likely will lull from late morning into the late afternoon across the Gulf/Bayside waters due to the heating of South Florida. As the high moves farther eastward and slowly weakens, easterly breezes will slacken Thursday through Sunday. A new high pressure will slide eastward Sunday night into Monday, allowing for another round of freshening breezes. The Approximate Shoreward Edge of the Gulf Stream as of April 10... 16 NM South of Dry Tortugas Light...on Loggerhead Key. 21 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 23 NM South of Sand Key Light...off Key West. 37 NM South of Looe Key...off Big Pine Key. 29 NM Southeast of Sombrero Key Light...off Marathon. 18 NM Southeast of Alligator Reef Light...off Islamorada. 13 NM Southeast of Molasses Reef Light...off Key Largo. 9 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. $$ GMZ031-152015- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 414 AM EDT Wed Apr 15 2026 .TODAY...East winds near 15 knots. Bay waters a moderate chop. .TONIGHT...Northeast to east winds near 15 knots. Bay waters a moderate chop. .THURSDAY...East winds 10 to 15 knots. Bay waters a light to moderate chop. .THURSDAY NIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Bay waters a moderate chop, becoming a light to moderate chop. .FRIDAY...Northeast to east winds 10 to 15 knots. Bay waters a light to moderate chop. .FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay waters a light to moderate chop. A slight chance of showers. .SATURDAY...East winds 10 to 15 knots. Bay waters a light to moderate chop. .SATURDAY NIGHT...East winds 10 to 15 knots, decreasing to near 10 knots. Bay waters a light to moderate chop, becoming a light chop. .SUNDAY...East winds 5 to 10 knots, becoming variable near 5 knots. Bay waters smooth to a light chop, becoming smooth. .SUNDAY NIGHT...North to northeast 5 to 10 knots, increasing to near 10 knots. Bay waters smooth to a light chop, becoming a light chop. $$ GMZ032-035-152015- 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- 414 AM EDT Wed Apr 15 2026 .TODAY...East winds near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a moderate chop. .TONIGHT...Northeast to east winds near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a moderate chop. .THURSDAY...East winds 10 to 15 knots. Seas 1 to 2 feet, subsiding to around 1 foot. West of the Marquesas Keys, seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop. .THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. .FRIDAY...Northeast to east winds 10 to 15 knots, briefly decreasing to near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a light chop. .FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. A slight chance of showers. .SATURDAY...East winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. .SATURDAY NIGHT...East winds 10 to 15 knots, decreasing to near 10 knots. Seas around 1 foot. Nearshore waters a light to moderate chop, becoming a light chop. .SUNDAY...East winds 5 to 10 knots, becoming variable near 5 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. .SUNDAY NIGHT...North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 foot or less, building to around 1 foot, except building to 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop, becoming a light chop. $$ GMZ042>044-152015- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 414 AM EDT Wed Apr 15 2026 .TODAY...East winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. .TONIGHT...Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. .THURSDAY...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. .THURSDAY NIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas around 2 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. A slight chance of showers. .FRIDAY...Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers. .FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers. .SATURDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. .SUNDAY...East winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters smooth to a light chop. .SUNDAY NIGHT...North to northeast winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot, except building to 1 to 2 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a light chop, becoming a light chop. $$ GMZ052>055-072>075-152015- 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- 414 AM EDT Wed Apr 15 2026 .TODAY...Northeast to east winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. .TONIGHT...Northeast to east winds 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 5 seconds. .THURSDAY...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. .THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers. .FRIDAY...Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers. .FRIDAY NIGHT...Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers. .SATURDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. .SUNDAY...East winds near 10 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. .SUNDAY NIGHT...Northeast winds 5 to 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. $$ GMZ033-034-152015- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 414 AM EDT Wed Apr 15 2026 .TODAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. .TONIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds. .THURSDAY...East winds 10 to 15 knots, becoming northeast to east 5 to 10 knots in the afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: East 3 feet at 4 seconds. .THURSDAY NIGHT...Northeast to east winds 5 to 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. .FRIDAY...Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. .FRIDAY NIGHT...Northeast to east winds 5 to 10 knots, increasing to 10 to 15 knots. Seas building to 1 to 2 feet. .SATURDAY...East winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot. .SUNDAY...East winds 5 to 10 knots, becoming north to northeast in the afternoon. Seas around 1 foot. .SUNDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming north to northeast 10 to 15 knots. Seas building to 2 to 3 feet. $$