Fishing Report
Big Four Reservoir Fishing Report
Williamson, IL
Modeled from National Weather Service data, plus solunar and sun/moon times computed in-house. This is a computed report, not an eyewitness catch report.
38.980934, -89.742137
Est. water temp
74.6°F
v1 estimate from air temperature — not a sensor reading
Species on record
No species on record yet for this lake.
Location
Big Four Reservoir · 38.9809, -89.7421
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Big Four Reservoir?
No fish species have been recorded for Big Four Reservoir yet. Check the live conditions to plan a trip on the surrounding water.
When's the best time to fish Big Four Reservoir?
No species are modeled for Big Four Reservoir yet, so there's no species-specific feeding window to name. The score still gives the light window 25% of its total, an input Bitespan grades "Well supported". Check today's bite forecast for Big Four Reservoir to see the best window for current conditions.
Where is Big Four Reservoir?
Big Four Reservoir is near Williamson, IL, at 38.9809, -89.7421.
Plan your trip to Big Four Reservoir
Get the hour-by-hour bite forecast and the best times to fish Big Four Reservoir, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.