Fishing Report
Diamond Lake Fishing Report
Mundelein, IL
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Modeled from live National Weather Service data as of Sep 9, 2026 at 8:59 AM CDT, plus solunar and sun/moon times computed in-house. This is a computed report, not an eyewitness catch report.
42.250308, -88.007511
Est. water temp
79.6°F
v1 estimate from air temperature — not a sensor reading
Notes from anglers
Imported from GNIS. Nearest town: Mundelein (Lake County, IL).
Today’s bite
Black Crappie fishing report
Best window today: 10 AM (Excellent · 93/100)
See the full forecast →Species on record
Suggest a species for this lake →Species detail
How to catch them at Diamond 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 →Channel Catfish feed most actively at Night, when activity runs about 36% above the daily average across all four light windows.
Typical Summer depth: 1-9 ft
Channel Catfish 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 →Muskellunge feed most actively at Dusk, when activity runs about 50% above the daily average across all four light windows.
Typical Summer depth: 6-20 ft
Muskellunge fishing report →
Location
Diamond Lake · 42.2503, -88.0075
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Diamond Lake?
State surveys have confirmed Black Crappie, Bluegill, Channel Catfish, Largemouth Bass, and Muskellunge in Diamond Lake.
When's the best time to fish Diamond 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 Diamond Lake to see the best window for current conditions.
Where is Diamond Lake?
Diamond Lake is near Mundelein, IL, at 42.2503, -88.0075.
Plan your trip to Diamond Lake
Get the hour-by-hour bite forecast and the best times to fish Diamond Lake, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.