CatchWindow fishing intelligence

Port Isabel, TX Daily Water Report — August 23, 2026

Port Isabel’s water is in a generous mood today: diving sits at 9.1, boating at 8.3, and sailing at 8, while the surf never really shows up. Open-Meteo’s current conditions and forecast put a representative southeast breeze near 8 knots, with the day’s wind spanning roughly 2 to 13 knots and the sharpest gust, about 15 knots, timed near 13:00. Marine seas stay almost unchanged around 0.4 meters, calmest near 22:00 at 0.36 meters, riding a short 4-second period and a 0.22-meter swell from the southeast. That is why surfing lands at 4.9 and why hulls and divers have the clearer case. The air runs 25.7 to 33.0 C under a cloudless sky, humidity near 79 percent, pressure steady around 1015 hPa, and no rain in the window. Marine sea-surface temperature is a warm 29.5 C, a slight 0.2 C cooler than average on the NOAA CoastWatch reading. Atmospheric visibility stretches 18.1 kilometers; that is air clarity, not a claim about what you will see underwater. A 0.4 m/s current setting toward the north-northwest is the real tradeoff for small craft—kayaking eases back to 6.7 even as powered boating stays comfortable. These scores describe suitability, not a safety guarantee. Fishing scores 7.1 from solunar timing, pressure, wind, and available clarity. The stronger windows are the morning major from 08:35 to 10:35 and the evening major after 20:35, under a waxing gibbous moon that rises at 17:09. Wildlife is a middling 6. Moderate chlorophyll only marks normal coastal productivity; it is not a fish or wildlife forecast. Against yesterday’s reconstructed scores, diving holds at the top, boating and kayaking improve as the wind backs off from 13.3 knots, and sailing eases from a stronger 9.2. Through midweek the forecast stays hot and nearly dry, peak winds climbing toward 15 knots while waves linger in the 0.2-to-0.4-meter range. Best bet: dive the quiet morning water, then let that afternoon southeast breeze earn its keep under sail.