Waters · United States
St. Lawrence River (Thousand Islands) fishing report
Updated Sunday, 23 August 2026 · refreshed several times daily
Gin-clear current, granite islands and the heaviest smallmouth average in North America — plus a legitimate shot at a 50-inch muskie every November.
Today's report: excellent (81/100)
Smallmouth Bass is the most promising species on St. Lawrence River (Thousand Islands) today. Water temperature is around 19°C and barometric pressure is rising.
Best time to fish today
- 09:00–11:00 local time — score 83/100
- 15:00–17:00 local time — score 73/100
- 07:00–09:00 local time — score 73/100
3-day outlook by species
| Species | Sunday 23 Aug | Monday 24 Aug | Tuesday 25 Aug |
|---|---|---|---|
| Smallmouth Bass | 81 — excellent | 80 — good | 76 — good |
| Muskellunge | 62 — good | 62 — good | 61 — good |
| Northern Pike | 45 — fair | 49 — fair | 48 — fair |
Why this score
Cast & Scan uses a deterministic, published scoring model — no black box. The strongest influences on today's St. Lawrence River (Thousand Islands) rating:
- water temperature: helping (+1)
- pressure trend: helping (+1)
- light: helping (+1)
- solunar period: helping (+1)
- wind: helping (+1)
- precipitation: helping (+0.9)
Forecast computed Sun, 23 Aug 2026 12:53:03 GMT · data: Open-Meteo · refreshed several times daily · see our published accuracy
Scan your exact spot
This page rates a representative point on St. Lawrence River (Thousand Islands). Bays, river mouths and depth changes can fish very differently — open the scanner, drop a pin on your exact swim and get a spot-specific forecast with tactics. Free, in the browser, no signup.
Wondering how this stacks up against the apps you already know? Cast & Scan vs Fishbrain vs BassForecast — an honest comparison, including where they beat us.
Nearby waters
- Bay of Quinte — Ontario, Canada (111 km away)
- Ottawa River — Ontario/Quebec, Canada (132 km away)
- Lake Champlain — Vermont/New York, USA (207 km away)
- Susquehanna River — Pennsylvania, USA (463 km away)