CatchWindow fishing intelligence

Nawiliwili, HI Daily Water Report — August 28, 2026

The surf is the headline today—9.4 out of 10 is as close to a lock as this coast delivers, and the tradeoff is that everyone else will know it. The long-period south swell, 1.14 meters at nearly 12 seconds from 174 degrees, is wrapping through cleanly, and the moderate northeasterly breeze in the 7-11 knot range will keep surface texture light enough for the morning and midday sessions. The wave-height forecast holds steady between 1.6 and 1.7 meters through the afternoon, but the real quality comes from that 11.85-second interval; that’s the kind of push that holds shape well into the lineup. If you’ve got a go-to south-facing break, the window from dawn through mid-afternoon is your strike. Diving scores an 8.3, driven by the same favorable wind and wave conditions, plus water temperature running 0.9 degrees above the seasonal average at 27 degrees. The low tide at 09:18 lines up with a solunar minor period, which can shift clarity in shallow zones, but the overall stability—stable pressure, calm current at 0.7 m/s, and oligotrophic blue water—points to good underwater visibility for those who time it before the afternoon wind kicks. The early high tide at 03:41 is impractical; low-tide slack after nine is your real bet. Boating and sailing are workable but not prime: the 6.3 and 7.5 scores reflect a sea state that’s a little energetic for a laid-back cruise, and the morning rain window from 04:00 to 13:00, though light at only 0.1 millimeters, could put a damper on smooth motoring. Kayaking at 4.5 is the skip of the day; that steady 7-to-14 knot wind and consistent swell will turn a paddle into an arm-breaker. Historically, yesterday’s surfing score was identical and diving edged up one-tenth, so the pattern is holding steady—no dramatic flip. The fishing score has improved slightly to 7.2, thanks to a Full Moon, stable pressure, and that midday solunar major period from 11:47 to 13:47 landing right on the slope toward the afternoon high. The chlorophyll is negligible at 0.06, so you’re not betting on bait-driven action; you’re fishing structure and timing. Looking ahead, the next few days bring a slight uptick in wave height to 1.8-1.9 meters by Sunday and Monday, with a sustained south swell and higher rain chances that push toward 75 percent. Tuesday and Wednesday keep similar swell but a lower chance of precipitation around 48 percent by midweek. The wind doesn’t spike dramatically, so the overall pattern remains surf-friendly with a slowly building hump. Your best bet: get on the water before the breeze bends the swell.