CatchWindow fishing intelligence

Port Chicago, CA Daily Water Report — August 27, 2026

Today’s water is a study in stillness, and the verdict is clear: this is a boating and diving day, no contest. With representative winds around 7 knots from the southwest and a flat-calm sea state holding at zero meters all day, the Port Chicago waterfront offers conditions that are practically engineered for stability. The diving suitability score of 8.2 out of 10 matches the three previous days’ marks, and that consistency is telling. Surface conditions are so glassy that underwater access is about as easy as it gets around here, though keep in mind that atmospheric visibility of 42 kilometers has no bearing on what you’ll see below the surface. The water temperature anomaly is running 2.2 degrees above the historical average, which is a notable shift from recent recollection—yesterday’s sea surface temperature was 23.1°C, compared to 16.2°C this time last week. That warmth is a legitimate plus for comfort in the water, but it’s supplied data, not an invitation to guess at marine life. The best windows fall squarely in the middle of the day. The solunar major period from 11:31 to 13:31 aligns with the calmest conditions and a stable barometer at 1013 hPa. That’s your prime target for boating, which scores an 8 out of 10, or kayaking at 7.6. Fishing comes in at 6.2 today, down from 8.1 two days ago, and that drop tracks with the midday solunar peak being the only real draw—tide data is absent, so we’re working with what we have. Surfing remains a non-starter at 4.5, and there’s no swell to speak of for the foreseeable future. The waxing gibbous moon, 98% illuminated, rises at 19:06 and sets just before sunrise, so evening light will be bright but not disruptive. Looking ahead, the marine forecast shows the same flat calm persisting through at least September 2nd. Winds will nudge up slightly—peak gusts near 11 knots on the 29th and 13 knots on the 31st—but nothing that should ruffle a steady hand. The tradeoff is that this placid pattern, while ideal for boaters and divers, offers little variety for anyone chasing waves or strong sailing breezes. If you’ve been waiting for a stretch of water that feels more like a lake than a bay, this is your week—just don’t expect any drama.