Jerms Lake
Vilas County, Wisconsin · WBIC 1856500
Size
72 acres
Max depth
38 ft
DNR lake type
Complex, Warm, clear water color
Water clarity
20.5 ft
Clear, measured Aug 2017
A warm-water lake type: the DNR groups it with lakes that warm up through summer. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1990), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
20.5 ft Secchi depthClearOlder reading
Last measured Aug 18, 2017. 25 readings on record, 2010 to 2017.
Typical summer clarity (June to September): 21 ft, clear, from 21 readings (2012 to 2017).
Nothing has been measured in the last 5 years, so this may not match the lake today.
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 Jerms Lake - Max Depth. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 24 (Apr 16 to Apr 30)
- Surface reaches 48°Fabout May 3 (Apr 26 to May 9)
- Surface reaches 64°Fabout May 26 (May 21 to Jun 2)
- June surface68°F, usually 67 to 70°F
- July surface74°F, usually 73 to 75°F
- August surface71°F, usually 69 to 73°F
Forms a warm top layer around May 5, lasting about 150 days.
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.
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.
More lakes in Vilas County
- Whitefish Lake1.0 miles away
- Little Crawling Stone Lake1.5 miles away
- Crawling Stone Lake1.7 miles away
- Wyandock Lake1.7 miles away
- Lucy Lake1.8 miles away
- Haskell Lake2.1 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
- 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
- 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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