CatchWindow fishing intelligence

Kawaihae, HI Daily Water Report — October 4, 2026

Kawaihae gets a strong go for powered boats, kayaks, and diving today, with the caveat that the ocean is behaving better than the midday heat. A steady 0.5 m sea, negligible wind-wave contribution, and very light west wind make this one of those rare days when the water looks more organized than your pre-launch checklist. Boating and kayaking both rate 9.8/10, while diving is 9.3/10; those are excellent suitability marks, not a substitute for site-specific judgment. The best all-around window is early morning through the late-morning high tide. Dawn arrives at 5:53 AM, the tide rises from a 0.13 m low at 3:27 AM to 0.70 m at 11:24 AM, and the calmest modeled seas are near 8 AM at 0.48 m. The first solunar major period, 6:29–8:29 AM, overlaps that cleanest stretch and gives fishing its most promising timing of the day. Fishing rates a respectable 6.1/10, helped by light wind, a rising barometer near 1015 hPa, and the tide movement, though it trails the stronger fishing scores recorded earlier this week. For divers, marine SST is 28.3 C, about 0.7 C above average, with low chlorophyll at 0.06 mg/m3. That supports the day’s high diving score alongside the gentle sea state, but it does not describe underwater visibility; plan from actual in-water conditions, not the 52 km atmospheric visibility forecast. The current is modest at about 0.14 m/s toward 45 degrees, still enough to matter around entries, exits, and exposed structure. By afternoon, the tradeoff is heat rather than chop: air temperatures approach 30.7 C, feeling closer to 35.5 C, with UV near 8. The evening low tide arrives at 7:11 PM, shortly after sunset, so shoreline explorers should keep tide timing and fading light in the same mental pocket. Sailing is only a 5.4/10 proposition because there is scarcely enough breeze to make a day of it. The next few days remain generally gentle, with 0.4–0.6 m waves through October 7 before seas build modestly to 0.6–0.7 m October 8–9; rain chances also rise late week. Best bet: launch early, use the rising tide and glassy 6:30–8:30 AM window, and be off the water before the sun starts acting like it owns the place.