CatchWindow fishing intelligence

Mona Island, PR Daily Water Report — August 23, 2026

Mona Island favors divers today, with sailors and short-period surfers in the next rank and anything small and paddle-powered taking the tradeoff. Diving leads at 8.4 out of 10, a shade under yesterday’s 8.6, on forecast seas of 1.1 to 1.3 meters, a representative southeast breeze near 8 knots gusting to 14, and water at 28.6 C—the same temperature as Saturday and 0.2 C below average. Sailing scores 7.7 and surfing 7.4. Wildlife sits at 7.1 and fishing at 6.8. Boating only reaches 5.2 and kayaking 4; those numbers describe fit, not permission. The most usable stretch is late morning. Wave height is forecast to bottom out near 10:00 at 1.06 meters, overlapping a solunar minor from 10:04 to 11:04 and arriving before the rain window of 15:00 to 23:00. Overnight already put the day’s strongest gust, 18.5 knots, on the water at 01:00. Air is muggy—about 27.5 C that feels like 31, 81 percent humidity, three-quarters cloud—and a drizzle-type weather code keeps atmospheric visibility near 8.3 kilometers. That is haze over the deck, not a read on the water column. Pressure is steady around 1015 hPa. The current is the honest hazard: 1.7 meters per second toward 77 degrees, under a 0.94-meter swell at 5 seconds from 132 degrees and 0.48-meter wind waves. Periods are short, so the 1.26-meter sea at 5.6 seconds will feel busy rather than groomed. Chlorophyll is a scant 0.07 mg/m3, oligotrophic blue water, which says nothing about what is moving through it. Tide data did not arrive. The afternoon solunar major, 15:34 to 17:34, sits inside the rain; the other major is the predawn 03:34 to 05:34 under a waxing gibbous moon, 76 percent lit, rising 11:49 and setting 22:06. Lighter wind than yesterday’s 13.2-knot representative is why boating and kayaking ticked up even while remaining the weak suits; fishing and sailing slipped. Through the 29th, marine forecasts hold waves near 0.9 to 1.4 meters. Rain chances peak Monday at 68 percent, then ease, with peak winds bouncing between about 11 and 14.5 knots. Best bet: take the late-morning lull for a dive while the rain is still only on the clock.