CatchWindow fishing intelligence

Kawaihae, HI Daily Water Report — October 5, 2026

Kawaihae gets a strong go for boating, paddling, and diving today, with a caveat: the water looks notably manageable, but the reported atmospheric visibility is only 0.2 km, so navigation and shoreline awareness deserve more attention than the gentle sea state might suggest. This is a calm-water day, not a switch-off-your-brain day. Waves hold in a narrow 0.4–0.5 m range, with the day’s minimum 0.44 m near 4 AM, and the main swell is a modest 0.3 m at 11.3 seconds from 221°. Northeast winds stay light, generally under 4.2 knots, though overnight gusts reached 11.5 knots. That combination supports excellent boating (8.8/10), kayaking (8.7/10), and diving (9.2/10). The 28 C marine sea-surface temperature is warm, and the available clarity inputs support the diving score; atmospheric visibility, however, is not a measure of underwater visibility. For anglers, the best structured window is the 7:26–9:26 AM solunar major period, followed by the midday high tide at 12:25 PM. Fishing rates 7.1/10, helped by light wind and favorable timing, though the falling pressure and limited atmospheric visibility keep the day from being an automatic masterpiece. A second major period runs 7:26–9:26 PM, overlapping the evening low at 7:42 PM; that is a different tide-stage proposition, so plan accordingly rather than treating it as a repeat of the morning. Sailing is the outlier at 5.2/10—not because the water is rough, but because there simply is not much wind to work with. Wildlife scores 8.2/10, with low-tide proximity and light wind contributing to the model estimate; it is not a guarantee of sightings. Chlorophyll is low at 0.06 mg/m³, described as oligotrophic blue water, but that does not predict fish or wildlife activity. Compared with yesterday’s near-flat, zero-wind setup, today is only slightly less glassy: boating and kayaking scores ease back, while diving remains in the same excellent range. Tuesday and Wednesday bring somewhat stronger winds and 0.5–0.7 m seas; Thursday and Friday look wetter and bump waves to 0.7–0.8 m before conditions ease again over the weekend. Best bet: launch early, use the calm morning water, and let the 7:26–9:26 AM fishing window do the scheduling.