Fly Fish ForecastBeta

Hatch predictions for 300+ US rivers — built from live water & weather, then confirmed against real fly-shop reports.

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Fraser River At Winter Park, Co.

Fraser River · Rockies · USGS gage 09024000

Coldwater (summer mean 10.3°C — prime coldwater).

Water
54°F
Flow
20 cfs
Air
65°F
Sky
0%
Predicted hatches · 2026-06-16
PredictedGreen DrakeDrunella spp.0.60
Predicted by conditions; no reports yet. water 12.2°C (54°F) sits in the prime band (11-15°C); peak season; watch midday, often cloudy.
flies: Green Drake Parachute #10-12, Cripple, Hares Ear #10
PredictedMidgeChironomidae0.32
water 12.2°C (54°F) is cooling past the prime band (1-10°C); shoulder of the season; 8 days sustained ≥0°C; watch midday, especially cold months.
flies: Zebra Midge #18-22, Griffith's Gnat, Disco Midge

PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.