Mann Lake
Vilas County, Wisconsin · WBIC 2332000
Size
261 acres
Max depth
18 ft
DNR lake type
Simple, Harsh
Water clarity
7 ft
Moderate, measured Aug 2026
A lake type the DNR marks as having harsh conditions for fish. This describes the lake type in general, not this lake in particular.
Outline
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
7 ft Secchi depthModerate
Last measured Aug 10, 2026. 230 readings on record, 1995 to 2026.
Typical summer clarity (June to September): 6 ft, moderate, from 49 readings (2012 to 2026).
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station MANN LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured Aug 10, 2026, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 20 (Apr 13 to Apr 27)
- Surface reaches 48°Fabout Apr 30 (Apr 21 to May 8)
- Surface reaches 64°Fabout May 27 (May 23 to Jun 1)
- June surface69°F, usually 68 to 71°F
- July surface75°F, usually 74 to 77°F
- August surface72°F, usually 70 to 73°F
Mixes regularly through the summer instead of forming a warm top layer.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Fish recorded near this lake
- Bluegill Lepomis macrochirus2004; 3 records
- Golden Shiner Notemigonus crysoleucas2004; 2 records
- Iowa Darter Etheostoma exile2004; 2 records
- Northern Pike Esox lucius2004; 2 records
- Pumpkinseed Lepomis gibbosus2004; 3 records
- Walleye Sander vitreus2004; 2 records
- White Sucker Catostomus commersonii2004; 1 record
- Yellow Perch Perca flavescens2004; 3 records
Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.
Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.
Boat landings
- 1Mann Lake RampBoat ramp · Concrete Plank surface · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Vilas County
- Emerald Lake0.9 miles away
- Firefly Lake1.1 miles away
- Wildwood Lake1.4 miles away
- Little John Lake1.6 miles away
- Vandercook Lake1.6 miles away
- Fallison Lake1.6 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- Fish recordedOpen fish survey and museum records, via GBIF, checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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