Fishing Report
Kolpack Lake Fishing Report
Mattoon, WI
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Modeled from live National Weather Service data as of Aug 29, 2026 at 7:55 PM CDT, plus solunar and sun/moon times computed in-house. This is a computed report, not an eyewitness catch report.
44.939239, -88.989314
Est. water temp
69.2°F
v1 estimate from air temperature — not a sensor reading
Max depth
19 ft
Deepest measurement on record
Max depth: Stachelek et al. (2021), LAGOS-US DEPTH v1.0, Environmental Data Initiative (CC BY 4.0)
Notes from anglers
Imported from GNIS. Nearest town: Mattoon (Shawano County, WI).
Today’s bite
Largemouth Bass fishing report
Best window today: 7 PM (Excellent · 92/100)
See the full forecast →Species on record
- Black Crappie — listed for this lake by category, not by name · Present
- Bluegill — listed for this lake by category, not by name · Present
- Pumpkinseed — listed for this lake by category, not by name · Present
- Rock Bass — listed for this lake by category, not by name · Present
- Yellow Perch — listed for this lake by category, not by name · Present
Species tagged “Group” were listed by the state under a category (e.g. “Panfish”) for this lake, not an individual-species survey.
Species detail
How to catch them at Kolpack Lake
Black Crappie feed most actively at Dawn and Dusk, when activity runs about 16% above the daily average across all four light windows.
Typical Summer depth: 10-20 ft
Black Crappie fishing report →Bluegill feed most actively at Dawn and Dusk, when activity runs about 33% above the daily average across all four light windows.
Typical Summer depth: 10-20 ft
Bluegill fishing report →Largemouth Bass feed most actively at Dawn and Dusk, when activity runs about 21% above the daily average across all four light windows.
Typical Summer depth: 8-20 ft
Largemouth Bass fishing report →Pumpkinseed feed most actively at Daytime, when activity runs about 33% above the daily average across all four light windows.
Typical Summer depth: 3-10 ft
Pumpkinseed fishing report →Rock Bass feed most actively at Dusk, when activity runs about 22% above the daily average across all four light windows.
Typical Summer depth: 5-15 ft
Rock Bass fishing report →Yellow Perch feed most actively at Dawn and Dusk, when activity runs about 30% above the daily average across all four light windows.
Typical Summer depth: 10-25 ft
Yellow Perch fishing report →
Location
Kolpack Lake · 44.9392, -88.9893
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Kolpack Lake?
State surveys have confirmed Largemouth Bass in Kolpack Lake.
When's the best time to fish Kolpack Lake?
Black Crappie feed most actively at Dawn and Dusk, when activity runs about 16% above the daily average across all four light windows. Check today's bite forecast for Kolpack Lake to see the best window for current conditions.
Where is Kolpack Lake?
Kolpack Lake is near Mattoon, WI, at 44.9392, -88.9893.
Plan your trip to Kolpack Lake
Get the hour-by-hour bite forecast and the best times to fish Kolpack Lake, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.