CatchWindow fishing intelligence

Nantucket Island, MA Daily Water Report — August 31, 2026

Today on Nantucket Island, the water's calling divers to take the plunge with an impressive 8.5 out of 10 suitability score. The favorable conditions feature manageable wave heights around 0.86 meters and a pleasant sea surface temperature of nearly 20°C, perfect for underwater exploration. Visibility won't be an issue above water either, with a clear 14.1 km sightline. For the rest of us ocean lovers, there's a mixed bag. Fishing scores a decent 6.9, with the best bite likely aligning with the solunar major period from 1:55 to 3:55 PM. The tidal swings are mild today, peaking at just over a meter, so plan your angling around the high tide at 3:07 PM for optimal conditions. Surfers might find the waves a bit short on period at 4.55 seconds, but a 6.6 score means there's still some fun to be had, especially later in the day when the swell calms down to about 0.48 meters around 8 PM. Meanwhile, sailors and kayakers will contend with light winds from the north-northwest, averaging 4 knots, making for a leisurely but less thrilling outing. Compared to recent days, today's conditions are a bit more relaxed with lighter winds and slightly cooler temperatures. Yesterday's higher scores for boating and fishing have dipped slightly, so adjust expectations accordingly. Looking ahead, the weather is set to shift with stronger winds and a higher chance of precipitation starting tomorrow. By the weekend, expect gusts up to 26.9 knots, so keep an eye on those forecasts if you're planning a jaunt on the water. In short, if diving's your game, today is your day—get in while the getting's good!