Fishing Report
Hewitt Lake Fishing Report
Mercer, WI
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Modeled from live National Weather Service data as of Sep 4, 2026 at 6:33 PM CDT, plus solunar and sun/moon times computed in-house. This is a computed report, not an eyewitness catch report.
46.300565, -89.976675
Est. water temp
74.3°F
v1 estimate from air temperature — not a sensor reading
Max depth
88 ft
Deepest measurement on record
Mean depth: 25 ft
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: Mercer (Iron County, WI).
Today’s bite
Largemouth Bass fishing report
Best window today: 7 PM (Excellent · 100/100)
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 Hewitt 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 Fall depth: 0-10 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 Fall depth: 6-18 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 Fall depth: 5-15 ft
Largemouth Bass fishing report →Muskellunge feed most actively at Dusk, when activity runs about 50% above the daily average across all four light windows.
Typical Fall depth: 8-25 ft
Muskellunge fishing report →Pumpkinseed feed most actively at Daytime, when activity runs about 33% above the daily average across all four light windows.
Typical Fall 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 Fall 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 Fall depth: 15-30 ft
Yellow Perch fishing report →
Location
Hewitt Lake · 46.3006, -89.9767
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Hewitt Lake?
State surveys have confirmed Largemouth Bass and Muskellunge in Hewitt Lake.
When's the best time to fish Hewitt 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 Hewitt Lake to see the best window for current conditions.
Where is Hewitt Lake?
Hewitt Lake is near Mercer, WI, at 46.3006, -89.9767.
Plan your trip to Hewitt Lake
Get the hour-by-hour bite forecast and the best times to fish Hewitt Lake, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.