Coastal Waters Forecast
Issued by NWS Key West, FL
Issued by NWS Key West, FL
001 FZUS52 KKEY 102125 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 425 PM EST Tue Feb 10 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. GMZ005-110930- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 425 PM EST Tue Feb 10 2026 .SYNOPSIS...High pressure off the Southeast U.S. coastline will slowly meander east out across the Atlantic. This will maintain gentle to moderate breezes across much of the Florida Keys coastal waters through at least Wednesday. Towards the end of the week, the high will flatten across Florida, leading to slackening breezes with a couple periods of brief light and variable breezes. Low pressure developing across the ARK-LA-TEX region and high pressure off the Southeast U.S. coastline will result in freshening east to southeast breezes over the weekend. The Approximate Shoreward Edge of the Gulf Stream as of February 4... 17 NM South of Dry Tortugas Light...on Loggerhead Key. 15 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 14 NM South of Sand Key Light...off Key West. 17 NM South of Looe Key...off Big Pine Key. 14 NM Southeast of Sombrero Key Light...off Marathon. 9 NM Southeast of Alligator Reef Light...off Islamorada. 4 NM Southeast of Molasses Reef Light...off Key Largo. 5 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. $$ GMZ031-110930- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 425 PM EST Tue Feb 10 2026 .TONIGHT...Northeast to east winds near 10 knots, decreasing to 5 to 10 knots. Bay waters a light chop, becoming smooth to a light chop. .WEDNESDAY...Northeast to east winds 5 to 10 knots, becoming east. Bay waters smooth to a light chop. .WEDNESDAY NIGHT...East to southeast winds near 5 knots, becoming variable. Bay waters smooth. .THURSDAY...Variable winds near 5 knots. Bay waters smooth. .THURSDAY NIGHT...West to northwest winds near 5 knots. Bay waters smooth. .FRIDAY...Variable winds near 5 knots. Bay waters smooth. .FRIDAY NIGHT...Winds becoming northeast 5 to 10 knots. Bay waters becoming smooth to a light chop. .SATURDAY...Northeast to east winds 5 to 10 knots, becoming east and increasing to near 10 knots. Bay waters smooth to a light chop, becoming a light chop. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots, increasing to near 15 knots. Bay waters a light to moderate chop, becoming a moderate chop. .SUNDAY...Southeast to south winds near 15 knots. Bay waters a moderate chop. Isolated showers. .SUNDAY NIGHT...South to southwest winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers. $$ GMZ032-035-110930- 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- 425 PM EST Tue Feb 10 2026 .TONIGHT...Northeast to east winds near 10 knots, increasing to 10 to 15 knots, except increasing to near 15 knots west of the Marquesas Keys. Seas around 1 foot, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light chop, becoming a light to moderate chop, except becoming a moderate chop west of the Marquesas Keys. .WEDNESDAY...Northeast to east winds decreasing to 5 to 10 knots, becoming east. Seas 1 foot or less. Nearshore waters becoming smooth to a light chop. .WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming variable. Seas 1 foot or less, except subsiding to 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop. .THURSDAY...Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. .THURSDAY NIGHT...Northwest to north winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. .FRIDAY...Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. .FRIDAY NIGHT...Winds becoming northeast 5 to 10 knots. Seas 1 foot or less. Nearshore waters becoming smooth to a light chop. .SATURDAY...Northeast to east winds near 10 knots, becoming east and increasing to 10 to 15 knots. Seas 1 foot or less, building to around 1 foot. West of the Marquesas Keys, seas around 1 foot, building to around 2 feet. Nearshore waters a light chop, becoming a light to moderate chop. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots, becoming southeast and increasing to 15 to 20 knots. Seas 1 to 2 feet, except building to 2 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming choppy. .SUNDAY...Southeast to south winds near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop. Isolated showers. .SUNDAY NIGHT...South to southwest winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers. $$ GMZ042>044-110930- 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- 425 PM EST Tue Feb 10 2026 .TONIGHT...East winds 10 to 15 knots, except increasing to near 15 knots west of Cosgrove Shoal Light. Seas 2 to 3 feet, except 3 to 4 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop, except becoming a moderate chop west of Cosgrove Shoal Light. .WEDNESDAY...East winds decreasing to 5 to 10 knots. Seas around 2 feet, except subsiding to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters becoming smooth to a light chop. .WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming variable and decreasing to near 5 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore waters smooth to a light chop, becoming smooth. .THURSDAY...Variable winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming smooth. .THURSDAY NIGHT...Northwest to north winds near 5 knots, becoming north to northeast. Seas 1 foot or less. Nearshore waters smooth. .FRIDAY...Northeast to east winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. .FRIDAY NIGHT...Northeast to east winds near 5 knots, increasing to 5 to 10 knots. Seas 1 foot or less, building to around 1 foot. Nearshore waters smooth, becoming smooth to a light chop. .SATURDAY...Northeast to east winds near 10 knots, becoming east and increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. Nearshore waters a light chop, becoming a moderate chop. .SATURDAY NIGHT...East to southeast winds 15 to 20 knots, becoming southeast. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy. .SUNDAY...Southeast winds 15 to 20 knots, becoming southeast to south near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Nearshore waters choppy, becoming a moderate chop. Isolated showers. .SUNDAY NIGHT...South to southwest winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers. $$ GMZ052>055-072>075-110930- 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- 425 PM EST Tue Feb 10 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS... .TONIGHT...East to southeast winds near 15 knots, increasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 5 seconds. .WEDNESDAY...East to southeast winds near 15 knots, becoming east and decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 4 feet at 6 seconds. .WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming northeast to east. Seas 2 to 3 feet, subsiding to around 2 feet. Wave Detail: East 3 feet at 5 seconds. .THURSDAY...North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. .THURSDAY NIGHT...Northeast winds near 5 knots. Seas around 1 foot. .FRIDAY...Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. .FRIDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming east and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to around 2 feet. .SATURDAY...East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. .SATURDAY NIGHT...East to southeast winds 15 to 20 knots, becoming southeast and increasing to near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. .SUNDAY...Southeast winds 15 to 20 knots, becoming southeast to south near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers. .SUNDAY NIGHT...South to southwest winds 10 to 15 knots . Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. $$ GMZ033-034-110930- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 425 PM EST Tue Feb 10 2026 .TONIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet. Wave Detail: East to southeast 2 feet at 3 seconds. .WEDNESDAY...East winds near 10 knots. Seas 1 to 2 feet. Wave Detail: East 2 feet at 3 seconds. .WEDNESDAY NIGHT...East to southeast winds 5 to 10 knots, becoming northeast to east and decreasing to near 5 knots. Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds. .THURSDAY...North to northeast winds near 5 knots. Seas 1 foot or less. .THURSDAY NIGHT...North to northeast winds near 5 knots. Seas 1 foot or less. .FRIDAY...Northeast to east winds near 5 knots. Seas 1 foot or less. .FRIDAY NIGHT...Northeast winds near 5 knots, becoming northeast to east and increasing to near 10 knots. Seas 1 foot or less, building to 1 to 2 feet. .SATURDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. .SATURDAY NIGHT...East to southeast winds 10 to 15 knots, becoming southeast and increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. .SUNDAY...Southeast to south winds 15 to 20 knots, becoming south near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. .SUNDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. $$