CatchWindow fishing intelligence

Chatham, MA Daily Water Report — October 6, 2026

Chatham gets a clear go for most on-water plans, with boating the day’s strongest practical fit at 7.9/10 and diving leading the board at 8.4/10. The catch is not rain or sky—both are cooperative—but a cool, gusty edge that rewards preparation over bravado. The useful daylight window begins around dawn at 6:14 AM and runs through the morning high tide at 9:01 AM. Winds are generally manageable from the WNW, though gusts can reach the low 20-knot range, and the 0.4–0.7 m sea state includes short-period wind waves around 0.46 m at 2.6 seconds. That is more chop than the modest headline wave height suggests, especially for small, lightly loaded craft. Boaters have the best overall setup, while sailors get enough breeze to work with but must account for the gust spread; sailing rates 7.2/10. Fishing is a solid 7.1/10, helped by rising pressure near 1016 hPa and the morning solunar major period from 8:21 to 10:21 AM, which overlaps the high-water turn. A second major period arrives from 8:21 to 10:21 PM, close to the 9:22 PM high tide, though darkness and the cooler air make that a more deliberate outing. The afternoon low tide at 3:25 PM also aligns closely with the 2:51–3:51 PM minor period. Divers have the best score, but 16.2 C water is no longer a casual-temperature proposition, and the score is not a safety clearance. Kayakers face the day’s clearest tradeoff: a respectable 6.2/10, but gusts, short wind chop, and a 0.5 m/s current toward 114 degrees argue for conservative timing and route choices. Atmospheric visibility is excellent near 28 km, though that says nothing about underwater visibility. Compared with yesterday, water is slightly warmer and boating remains strong, while kayaking has slipped sharply from 8.2 as the wind becomes more consequential. Looking ahead, Wednesday trends calmer at 0.2–0.5 m, Thursday builds to 0.5–0.8 m, and Saturday currently looks like the smooth-water standout at 0.2–0.3 m. Best bet: launch after dawn, work the morning high-tide turn, and be back in before the gusts turn a pleasant October outing into a forearm workout.