CatchWindow fishing intelligence

Southbank Riverwalk, St Johns River, FL Daily Water Report — August 28, 2026

Boating and kayaking own the river today, with the St. Johns laying out a glassy, cooperative sheet that’s among the best this late-summer stretch has offered. If you’ve got a hull, this is your morning. The story is the wind. A representative southwest breeze of just 4 knots, gusting to 6, keeps the surface flat from dawn through the outgoing tide. Wave heights throughout the target day stay at a dead zero across all hours, which is as calm as it gets. That means the early low at 05:01 and the morning flood are both prime windows for covering water with minimal effort—paddlers especially will find the 8.9 score well-earned; comparable to the 8.8 and 8.9 scores from earlier this week, though with slightly better marine conditions than yesterday’s similar reading. Diving scores an 8.2, and with water temperature sitting at a noticeably warm 29.3°C—a full 1.2 degrees above average for this date—visibility potential should be decent under the calm surface. Just be aware that the high chlorophyll reading of 3.43 mg/m³ often corresponds to reduced underwater clarity, even if the scoring methodology doesn’t directly tie that to the dive rating. The 6.9 fishing score reflects decent solunar timing, with a major period peaking near 13:00 and the midday low slack tide, though the full moon’s illumination can sometimes make fish tight-lipped during bright hours. Surfing is a non-starter—4.5 and flat water—and sailing’s 5.9 reflects that there’s simply not enough consistent breeze for efficient tacking. Wildlife watchers get a 6.8, helped by the low tide exposing shoreline edges, but wind so light means less surface activity to spot. Compared to yesterday, boating has jumped from 8.6 to 9.3—that’s the biggest gain, powered by the rising barometer (now 1018 hPa and climbing) and the near-total absence of rain. The 0% cloud cover and zero precipitation forecast keep things stress-free for any outing. Looking ahead, the next two days introduce a slight uptick in wind—peaks near 8-10 knots by Sunday and Monday—along with a growing chance of afternoon showers that could reach 47% on Saturday. The marine forecast shows the flat wave pattern persisting through at least next Wednesday, so the river will stay docile even as the air heats toward dangerous territory. Best bet: If you launch before the high tide at 10:47, you’ll have three hours of mirror-calm river with the flood current working for you.