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Key West, FL Daily Water Report — August 21, 2026

August 21, 2026, in Key West was a solid day for most water activities, with boating and kayaking taking the top spots thanks to calm seas and gentle winds. The boating score of 7.9/10 and kayaking at 7.5/10 reflected ideal conditions, with wave heights staying mellow between 0.2 and 0.4 meters. The calmest seas were just after midnight, making for a smooth start for early risers. Fishing enthusiasts found decent opportunities, scoring a 6/10. The solunar activity peaked in the early morning and late afternoon, aligning well with the day’s tide schedule. A first quarter moon at 59% illumination provided a little extra light for those casting lines during the major solunar periods. Surfers had less to cheer about, with a score of 4.5/10. Waves were modest, peaking at 0.28 meters, which didn't offer much for those seeking a thrill. The swell from 303 degrees was gentle, and with no wind waves to speak of, it was a day better suited for beginners than seasoned wave riders. Diving conditions were favorable, scoring 7.6/10, with warm sea surface temperatures at 31.7°C and minimal wind. Visibility was excellent at 24.4 km, making it a great day to explore underwater treasures. Wildlife watchers also had a reason to smile, with a score of 7.8/10, as the calm waters and favorable solunar periods likely made for active sightings. Looking ahead, the weather is set to shift slightly. Winds will gradually pick up, reaching peaks of 16.4 knots by August 26, with a rising chance of rain. If you’re planning a water adventure, aim for the earlier part of the week to take advantage of the milder conditions. For a memorable outing, kayaking during the calm morning hours offered a serene experience amidst the gentle tides.