CatchWindow fishing intelligence

Nantucket Island, MA Daily Water Report — October 8, 2026

A qualified go for Nantucket water time today: boating and sailing have workable daylight, diving is the standout on the supplied scores, while paddlers should treat the afternoon as a different, rougher proposition than the morning. The cleanest all-around window is early, after dawn at 6:16 AM and before the wind builds toward its 1 PM gust peak of 29.4 knots. Representative southwest wind is only 6 knots, but the day’s 5.5–16.9-knot range and that gust potential matter more than the pleasant average. Waves run 0.7–1.3 m, with a representative 0.86 m at a short 4.1 seconds; most of that energy is wind wave rather than swell. That can make for a lively, closely spaced surface even without a large swell. The calmest forecast wave height, 0.7 m, is near midnight—not a daylight invitation, just useful context. Diving rates 8.2/10, supported by the available conditions in the scoring model, though 16.9 C marine SST is firmly cool-water territory. Boating scores 7.2 and sailing 7.0, both solid enough for crews prepared for strengthening gusts and a brisker ride later on. Kayaking is only 5.4/10: the 1.03 m/s ocean current toward 51 degrees, short-period waves, and afternoon gust spread are a poor recipe for casual exposure. Fishing is a respectable 6.7/10, with the late-morning solunar major period from 9:56–11:56 AM lining up closely with the 11:05 AM high tide. The evening major period, 9:56–11:56 PM, overlaps the 11:31 PM high but comes after sunset. The air reaches 20.3 C, skies are lightly clouded, rain is not indicated, and pressure rises from roughly 1010 hPa. Atmospheric visibility is forecast at 17 km; that is not a measure of underwater visibility. Compared with yesterday’s reconstructed CatchWindow history, boating is a point lower and kayaking is down 1.1 points, while sailing is only slightly softer. Friday and Saturday look dry with lighter peak winds and generally smaller waves, especially Saturday into Sunday, before wetter and windier conditions arrive Monday and build through midweek. Best bet: make the late-morning high-tide window your main event, but be back in before the afternoon gusts decide they own the place.