CatchWindow fishing intelligence

Copano Bay, TX Daily Water Report — August 28, 2026

The verdict on Copano Bay for August 28 is a clear green light for boaters and paddlers, while anglers have a decent, if not spectacular, day ahead. The best window is the late morning through early afternoon, aligning with the high tide slack and a solunar major period running from 12:31 to 14:31. Winds will hold under 10 knots through midday, keeping the bay smooth—the calmest wave heights, around 0.14 meters, are expected near noon, which is ideal for small craft and kayak exploration. A full moon overhead tonight means stronger tidal movement than recent days, but this afternoon’s tidal range is negligible, with a low of 0.08 meters and a high of 0.09 meters inside three hours. That micro-tide limits the flushing action that often triggers a strong feed, but the full moon’s gravitational pull and the midday solunar period do boost the fishing score to 6.6 out of 10—a notch above yesterday’s 6.9, but slightly below the 7.9 recorded two days ago under a lighter south wind. The south breeze is a tradeoff. At a representative 5 knots with gusts topping 14.6 knots near sunset, it’s pleasant for sailing (scored 6.7) and kayaking (7.8) through the afternoon, but that afternoon pickup will turn the bay choppy east of the causeway. The boating score of 8.8 is the highest of any activity today, reflecting light waves, no rain, and relatively stable barometric pressure rising through 1017 hPa—all favorable for a stable, comfortable ride. Surfing remains a non-starter at 4.5; the swell is short-period and under 0.2 meters, not worth dragging a board out for. Wildlife watchers get a 6.6, pulled down by the full-moon timing and light winds that mean birds and wading life will be scattered in the shallows rather than concentrated. Compared to recent days, today’s southerly breeze is lighter than the 9.8-knot gusty Wednesday and certainly gentler than the 10-knot trends of last weekend. The water temperature is running 30.5 degrees Celsius, a couple degrees warmer than the week’s average, and the marine layer is thin at 16 percent cloud cover, so expect blazing sun by mid-morning with a heat index near 40. The incoming weekend will push wind back up: Friday peaks near 11 knots, Saturday and Sunday both flirt with 14-knot gusts. That makes this afternoon the calmest window until Monday. Best bet: get the boat in the water by 10 a.m., work the midday outgoing around oyster bars, and be tied up before the seabreeze humps.