CatchWindow fishing intelligence

Kahului, Kahului Harbor, HI Daily Water Report — August 28, 2026

Today’s best bet is a diving morning or a sailing afternoon, with the full moon pulling tides and adding a little extra pulse to an already clean water setup. Let’s call it plainly: conditions tilt decisively toward those who want to get out on the water or under it. The diving score of 9/10 is the standout, buoyed by light morning wind, warm 26.6°C sea surface temperature sitting 0.7°C above average, and oligotrophic clarity that tends to mean blue, open water with good visibility. The low tide at 08:13 coincides with dawn at 05:47 and a minor solunar period from 06:06, which may concentrate whatever life is moving near the harbor edges. That early window is your sweet spot before the trade winds build. By late morning, the representative east-northeast wind picks to 11 knots gusting 22, but it stays steady and moderate enough to push a sailing score of 9.2/10. That’s a nearly perfect rating, and it’s worth noting this is a tick higher than yesterday’s identical sailing score, likely because the wave height has dropped just slightly to 0.92 meters at 13 seconds. The long, clean swell from 186 degrees is manageable and consistent. The boating score of 7.3/10 suggests a comfortable ride for power vessels, though the 32.9-knot gust predicted at noon is a real hazard—keep an eye on that midday window and plan around it. Surf scores an 8.9/10, driven by that long-period ground swell and offshore-friendly wind direction through the morning. The tradeoff: the 0.8-0.9 meter wave range is modest, so bigger-wave hunters may feel limited, but the rhythm should satisfy those on shorter boards looking for a clean, groomed line. Kayaking at 5.6/10 is suppressed by the building wind and chop; it’s doable in the lee or early, but not recommended for open crossings. The wildlife score of 7/10 aligns with the full moon low tide and solunar activity, and while chlorophyll is low, the timing alone may make shoreline exploring more interesting. Compared to yesterday, the wind is a touch lighter on average (11 knots vs 15.6), and the diving and surfing scores have actually edged upward. Barometric pressure remains stable at 1015 hPa, and despite a 42% cloud cover and a rain window flagged from 07:00 onward, the representative precipitation is zero—those clouds are likely just high overcast and not a soaking threat. Looking ahead, the wave heights taper off through the weekend, bottoming around 0.6-0.7 meters by Sunday and Monday, with peak wind dropping slightly too. But precipitation chances tick up to 65% on Saturday and Monday, so today may be the cleanest window for some days. Bottom line: if you’ve got a mask or a tiller, get on the water early and let the full moon be your excuse.