CatchWindow fishing intelligence

Aransas Wildlife Refuge, TX Daily Water Report — August 28, 2026

It’s a boating and diving morning at Aransas Wildlife Refuge, with the full moon pulling a classic August setup: a tiny tidal pulse and glassy windows. Today’s best bet is the late-morning lull—calmest waves bottom out around 0.2 meters near 13:00, winds hold steady from the ESE at 7 knots, and the representative wave height sits at 0.22 meters. That combination earns boating an 8.6, diving a 7.9, and sailing a 7.9, all solid scores that beat yesterday’s windier conditions. Fishing scores a 7.4, helped by the solunar major period straddling noon to 14:31 and a rising barometer at 1016 hPa, though the near-zero tide range (low of 0.07m at dawn, high of just 0.12m at dusk) means minimal water movement—look for fish holding deeper rather than pushing into the marsh edge. For perspective, yesterday’s 10.4-knot breeze and lower pressure dragged boating down to 7.6 and kayaking to 5.5. Today reverses that: kayaking climbs to 7.3, wildlife watching to 6.6, and even the underwhelming surf score of 4.5 is slightly better than the 4.6 and 4.7s from earlier in the week. The tradeoff? The full moon rising at 19:39, just after sunset at 19:55, will flood the shallows with light, but the high tide at 19:19 is barely a slosh—no real change to the water column. Diving notes the SST at 28.9°C, which is 1.1 degrees below average for late August; that cool anomaly might feel refreshing, but it’s not a clarity signal. Visibility data isn’t supplied, so don’t assume clear water from the air visibility of 22.6 km. Heads up: the “calmest” near 13:00 means 0.22m waves, not dead flat. The ESE wind, though light, will put a slight ripple on the surface all day, and the heat index hitting 39.1°C demands sun protection and hydration. No rain in sight, but UV is moderate at 4.75. Looking ahead, Friday (8/29) keeps the low-wave pattern with 0.2-0.3m swells and a slight uptick in wind to 11.6 knots—still workable for paddling and diving. Saturday (8/30) brings a 28% chance of rain and peak wind near 13.4 knots; that’s when the afternoon could turn choppy. By Sunday and Monday, wave heights creep to 0.3-0.5m as winds build to 16.4 knots, likely knocking down boating and diving scores. The glassy, sunlit midday window is your brief, best chance for calm water—take it before the breeze picks up and the full moon sets up a different kind of night.