Mermaid Lake
Vilas County, Wisconsin · WBIC 2768100
Size
60 acres
Max depth
35 ft
DNR lake type
Complex, Cool, clear water color
Water clarity
7.8 ft
Moderate, measured Oct 2002
A cool-water lake type: the DNR groups it with lakes that stay cooler through summer. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1981), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
7.8 ft Secchi depthModerateOlder reading
Last measured Oct 10, 2002. 84 readings on record, 1997 to 2002.
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 Mermaid Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 26 (Apr 16 to May 1)
- Surface reaches 48°Fabout May 1 (Apr 24 to May 9)
- Surface reaches 64°Fabout May 25 (May 20 to May 27)
- June surface69°F, usually 68 to 70°F
- July surface74°F, usually 73 to 76°F
- August surface71°F, usually 70 to 73°F
Forms a warm top layer around May 5, lasting about 155 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.
Stocking history
- Black Crappielast stocked 2024 (yearling); stocked in 1 year since 2010
- Walleyelast stocked 2024 (large fingerling and small fingerling); stocked in 9 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
More lakes in Vilas County
- Horsehead Lake1.0 miles away
- Armour Lake1.0 miles away
- Little Horsehead Lake1.0 miles away
- Spread Lake1.2 miles away
- North Crab Lake1.7 miles away
- Presque Isle 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
- Stocking historyWisconsin DNR annual fish stocking summary, 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
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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