CatchWindow fishing intelligence

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

The window is this morning. Surfers and divers get the highest suitability today, with a surfing score of 9.3 and diving at 8.5, thanks to a clean, moderate south swell and light trades that will hold until midday. The swell is running 1.16 meters from 178 degrees at nearly 12 seconds, which is a solid, workable south pulse for the harbor entrance and outer reefs. Winds are out of the northeast at 7 knots, gusting to 15, but the calmest wave height—1.32 meters—arrives near 19:00, so the afternoon will also be manageable if you time it right. The trade-off is a strong gust to 25 knots at 10:00 sharp, which will ruffle the surface and make small craft less comfortable from late morning onward. Compared to yesterday, the surfing score dipped slightly from 9.4 to 9.3, but that’s splitting hairs. Diving is essentially identical, and fishing actually held steady at 6.4 despite a full moon and major solunar periods around noon and midnight. The water is 27.7 degrees—a full degree above average—and the chlorophyll reading is extremely low at 0.07 mg/m³, which means blue, clear offshore water has pushed in. That's a bonus for underwater visibility but does not indicate bait or gamefish activity. Low tide at 09:52 and again at 22:56 will expose shoreline structure, which is worth noting for any wading or reef exploration. The hazard today is the afternoon rain window from 11:00 to 23:00. No measurable precipitation is expected, but the chance jumps dramatically in the coming days—84 percent tomorrow, 87 percent Saturday. The wind will remain similar through the weekend, but the swell will slowly back off, dropping to 0.7-0.9 meters by Sunday. Early risers this morning have the best bet: get out before the gusts spike, let the low tide expose the ledges, and the south swell will do the rest.