Waters · United States
Trinity River (Lewiston) fishing report
Updated Friday, 9 October 2026 · refreshed automatically through the day
A cold tailwater below Lewiston Dam and the Trinity hatchery, running through the mountains of Northern California — the state's most dependable steelhead water once autumn releases start.
Today's report: good (75/100)
Brown Trout is the most promising species on Trinity River (Lewiston) today. Water temperature at the gauge is 10.4°C (51°F) and barometric pressure is stable. Gauge TRINITY R A LEWISTON CA shows the water level falling (0 cm/24h).
Trinity River (Lewiston) water temperature and flow
- Water temperature: 10.4°C (51°F)
- Discharge: 12.9 m³/s (456 cfs) — down 2% over 24 hours
- Level trend: falling (0 cm/24h)
Measured at gauge TRINITY R A LEWISTON CA · reading 11 min ago. Published by the national hydrological service, not estimated by us.
Best time to fish today
- 18:00–20:00 local time — score 64/100
- 00:00–02:00 local time — score 85/100
- 03:00–05:00 local time — score 79/100
3-day outlook by species
| Species | Friday 9 Oct | Saturday 10 Oct | Sunday 11 Oct |
|---|---|---|---|
| Steelhead | 51 — fair | 66 — good | 72 — good |
| Chinook salmon | 59 — fair | 79 — good | 82 — excellent |
| Brown Trout | 75 — good | 86 — excellent | 91 — excellent |
Why this score
Cast & Scan uses a deterministic, published scoring model — no black box. The strongest influences on today's Trinity River (Lewiston) rating:
- light: helping (+1)
- season: helping (+1)
- wind: helping (+0.9)
- precipitation: helping (+0.9)
- solunar period: helping (+0.85)
- river flow: helping (+0.85)
Forecast computed Fri, 09 Oct 2026 11:56:25 GMT · data: Open-Meteo + gauge TRINITY R A LEWISTON CA · refreshed automatically through the day · see our published accuracy
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.
Read before you go
- Trout stream tactics, read through the forecast
- How river flow trend changes the bite
- Barometric pressure and fishing, explained
More steelhead waters
- American River (Fair Oaks) — California, USA
- Au Sable River (Foote Dam) — Michigan, USA
- Cowlitz River (Castle Rock) — Washington, USA
- Deschutes River (Sherars Falls) — Oregon, USA
- Feather River (Oroville) — California, USA
Nearby waters
- Feather River (Oroville) — California, USA (171 km away)
- Clear Lake — California, USA (188 km away)
- Rogue River (Grants Pass) — Oregon, USA (194 km away)
- American River (Fair Oaks) — California, USA (269 km away)
- Truckee River (Farad) — California, USA (276 km away)
- Sacramento–San Joaquin Delta — California, USA (312 km away)