CatchWindow fishing intelligence

Kahului, Kahului Harbor, HI Daily Water Report — September 5, 2026

Kahului Harbor is a diving, surfing, and boating day first, with kayaking close behind; sailing is the soft spot, and fishing and wildlife sit in the modest middle. Diving leads at 9 out of 10 on light representative wind and a nearly locked wave range. Surfing follows at 8.5 on a 1.02-meter sea at 10.2 seconds, swell near a meter from 190 degrees at 8.9 seconds, and essentially no wind sea. Boating scores 8.4 and kayaking 7.8 on that same quiet baseline. These are suitability scores, not safety declarations. Treat the wind as two clocks. Current and forecast conditions put representative flow at 1 knot from the south, gusting to 4, but the day’s range runs 0.7 to 15.8 knots, with the strongest gust 31.5 knots at 13:00. Morning is the cleaner window: after 06:11 sunrise, through the 06:40–08:40 solunar major, and toward the NOAA high of 0.74 meters at 11:36, following the 0.09-meter low at 02:21. The marine forecast holds waves at 1.0 to 1.1 meters, calmest near 01:00 at 1 meter, with a 0.5 m/s current toward 135 degrees—enough to matter on a paddle or a dive exit. Atmospheric visibility is only 0.6 km, which is air, not water; boaters and shoreline explorers should work short even with 17 percent cloud cover and a weather code of 0. Rain is mapped across the calendar day, yet representative precipitation is still 0 mm. Pressure sits at 1010 hPa and falling. Air runs 23.6 to 28.5 C, humid at 83 percent. Reconstructed scores from yesterday mark the flip: boating and kayaking were 5.9 under 16.8-knot wind; they jump today. Sailing drops from 8.2 to 5.6 as the breeze goes light, then inconsistent. Fishing eases from 5.3 to 6.2 on solunar timing, tide, pressure, and wind. Diving has stayed excellent through the recent stretch. CoastWatch marine SST is 26.5 C, 0.3 C above average, with chlorophyll at 0.08 mg/m3 in oligotrophic blue water. Last-quarter moon, 42 percent illuminated. Forecasts for the 6th through 8th bring 73 to 90 percent precipitation chances and waves building toward 1.5–2.1 meters; by the 9th through 11th, seas ease and rain odds fall. Best bet: take the dive or the surf before 13:00, and leave the sail for steadier air.