CatchWindow fishing intelligence

Kahului, Kahului Harbor, HI Daily Water Report — October 4, 2026

Kahului Harbor gets a qualified green light today: diving is the standout at 8.9/10, sailing rates 8/10, and boating remains a respectable 7.3/10—but the ENE wind is the boss of the schedule, not an optional extra. The most useful window is early, from dawn through the 6:31–8:31 AM solunar major period, before the day’s strongest gusts build toward 36 knots around noon. The tide is rising toward a 0.74 m high at 10:58 AM, and seas hold near 0.7 m on a 10.8-second period, with a modest 0.52 m south swell. Marine SST is 26.8 C, slightly above average, while the available ocean-color reading is low chlorophyll at 0.08 mg/m³; that describes low surface productivity, not fish presence or underwater visibility. Divers have the best numerical outlook, supported by the moderate sea state, warm water, and available clarity inputs in the score. Still, 18-knot representative ENE wind and much higher gust potential make exposed entries, exits, and surface intervals the part to take seriously. Boaters and paddlers should similarly favor the morning and expect a much more demanding return if the midday gusts arrive on cue. Kayaking scores 6.5/10: workable, but notably less forgiving than the calmer recent days. Yesterday’s reconstructed 2.9-knot wind helped boating and kayaking score 8.9 and 8.4; today is a different animal. Fishing earns a middling 6.1/10, with the early major period and rising pressure near 1015 hPa offering the cleaner opportunity. A second solunar major period runs 6:31–8:31 PM, but it overlaps the evening low tide at 6:55 PM and follows a windy day, so it is more selective than automatic. Wildlife is only 4.5/10 under the model, chiefly constrained by wind despite the low-tide timing. Skies are mostly clear, air temperatures reach about 28.9 C, and atmospheric visibility is forecast near 16 km—useful above water, not a promise below it. Rain is forecast in the afternoon and evening window, though representative precipitation is zero. Monday stays near 0.7 m but brings a 73% rain chance; Tuesday looks lighter-winded, while seas build toward 0.8–0.9 m later in the week. Best bet: make the early rising tide your water time, then let the noon gusts have the last word.