CatchWindow fishing intelligence

Honolulu Harbor, HI Daily Water Report — October 7, 2026

Honolulu Harbor gets a clear green light for boating and diving today, with kayaking also in good shape—provided you treat the afternoon gusts and evening rain window as real planning factors, not decorative fine print. Boating leads the board at 7.9/10, diving is 8.8/10, and kayaking sits at 7/10. Those are favorable-use estimates, not safety guarantees. The cleanest all-around window is from shortly after dawn through late morning. Sunrise is 6:25 AM, with the low tide at 7:31 AM, and winds are generally light within a 2.5-to-7.9-knot daily range. The 1.1-to-1.2 m sea state is steady rather than glass-flat, driven chiefly by a 1.02 m southerly swell at 10.55 seconds. That is enough motion to keep small craft operators attentive, but it is not a day defined by wind chop; forecast wind waves are zero. Water is warm at 27.6 C, and the available ocean-color reading is low chlorophyll, 0.07 mg/m³. That supports the diving score’s available-clarity component, but it is not a direct underwater-visibility measurement. For anglers, the 5.9/10 fishing outlook is serviceable rather than electric. The major solunar period from 9:15 to 11:15 AM overlaps the more manageable daytime weather, while the 1:54 PM high tide offers another timing marker. Pressure is falling from a representative 1008 hPa, and gusts build sharply enough to reach 20.6 knots around 2 PM, so the afternoon is less tidy than the morning. The second major solunar period, 9:15 to 11:15 PM, lands inside the forecast rain window from 7 PM to 11 PM—an awkward combination for anyone hoping for an easy evening. Compared with the reconstructed recent run, boating improves from 7.2 yesterday and kayaking is nearly unchanged from 6.9, while fishing slips from 6.2. Sailing, at 6/10, is also less compelling than several recent days: light representative wind is offset by the wide gust spread. Thursday looks wetter and rougher, with rain chances at 100% and waves up to 1.9 m. Conditions settle progressively over the weekend, with Monday and Tuesday currently showing the smallest seas near 1.0 m. Best bet: launch after dawn, use the late-morning tide-and-light window, and be back in before the 2 PM gusts start acting like they own the harbor.