CatchWindow fishing intelligence

Seattle, WA Daily Water Report — August 27, 2026

Today is a flat-water paradise. Unless you’re a surfer, this is the day to be on the water. Boating and kayaking both score near-perfect, and the numbers tell a simple story: a representative wind of just 2 knots from the NNW, a wave height of only 0.12 meters, and no measurable rain. The morning is your window of maximum calm, with waves bottoming out near zero around midnight, but the light southerly swell and near-glass conditions hold through the afternoon. The afternoon wind picks up to about 11 knots, with a stronger gust possible near 5 PM, but the overall picture is one of stability and ease. Diving also shines with an 8.4, and the water temperature holds at a pleasant 15.6°C, a full four degrees warmer than average for late August. That’s a meaningful anomaly. Visibility is just under 18 kilometers in the air, but underwater clarity is a different variable—be cautious extrapolating that number. The chlorophyll reading is elevated, which the scoring methodology connects to good baitfish activity, but take that as a hint from the algorithm, not a confirmed sighting. Fishing scores a solid 6.7, a step down from yesterday’s 8.2 and the string of high 8s and 9s from the past three days. The solunar window around midday from 11:34 to 1:34 could still produce a decent bite, but the tide data is missing today, and no station detail is available to help fill that gap. The pressure is high and rising, which tends to slow midday feeding. Plan around the minor period from 6:04 to 7:04 AM if you’re chasing a morning window. Surfing remains the outlier at 4.5, unchanged from the last several days, and with a 0.12-meter swell from 208 degrees at a 1.95-second period, there isn’t enough energy to work with. Sailing sits at 5.6, a notch below yesterday’s 5.8, as the winds are simply too light for consistent performance. Looking ahead, Thursday stays similar with a light peak wind of 9 knots and calm wave heights. Friday introduces a 77% chance of rain—keep that in mind for late-week plans. Saturday and Sunday rebound drier and still calm, then Monday picks up with stronger gusts near 12 knots. The verdict: get out this morning while the water is a mirror and the sun pushes toward 23°C.