CatchWindow fishing intelligence

Nawiliwili, HI Daily Water Report — September 5, 2026

Sailing and surfing own Nawiliwili today; small boats and kayaks do not. Forecast suitability sits at 8.6 for sailing and 8.3 for surfing, with diving close behind at 7.7. Boating is a 4.3 and kayaking a 2.4, so this is a day to choose your craft, not a day to assume the water is easy. Those scores are not safety declarations. A representative northeast wind of 13 knots, gusting to 28, is the main character, with the strongest gust of 31.1 knots due around 14:00. Seas barely budge all day, 2.3 to 2.4 meters, calmest near 10:00 at 2.3 meters—the minimum, not a glassy interlude. A 1.52-meter swell at just over 9 seconds from 172 degrees carries the set, with 1.12-meter wind waves at a short 4 seconds stacked on top and a 1.2 meters-per-second current setting toward 27 degrees. That combination is why sail and surf stay in the game and why paddling does not. Use the morning. Sunrise is 06:22, and the marine field is as settled as it gets before a drizzle window opens from 13:00 through 23:00, even if the representative total is only 0.1 millimeters. Air holds near 26.3 C under roughly half cloud, pressure steady around 1010 hPa. Atmospheric visibility is 7.72 kilometers; that is not underwater clarity. Marine sea-surface temperature is 27.3 C, about 0.4 C above average. Chlorophyll is a scant 0.06 mg/m3, oligotrophic blue water with low productivity—not a cue for wildlife. Fishing is only 5.5, down from 7.1 yesterday and from 8.5 earlier in the week as winds have built out of the high single digits. Wildlife holds at 6.8. Solunar majors run 06:52–08:52 and 18:52–20:52 under a last-quarter moon. Tide data are unavailable. Tomorrow looks wetter with similar seas, then a real step-up: waves 2.7–4.7 meters on the 7th and 2.7–4.9 on the 8th before they ease later in the week. Best bet: take the sail or a board before noon, and leave the kayak on the rack.