Tea Lake
Ashland County, Wisconsin · WBIC 2922700
The DNR lists this lake's watershed (Marengo River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
Size
50 acres
Max depth
48 ft
DNR lake type
Complex, Cool, clear water color
Water clarity
6.8 ft
Moderate, measured Sep 2017
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 1990), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
6.8 ft Secchi depthModerateOlder reading
Last measured Sep 4, 2017. 12 readings on record, 2007 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 Tea Lake deep hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 19 (Apr 12 to Apr 26)
- Surface reaches 48°Fabout Apr 30 (Apr 23 to May 7)
- Surface reaches 64°Fabout May 28 (May 24 to Jun 4)
- June surface70°F, usually 68 to 71°F
- July surface76°F, usually 74 to 77°F
- August surface73°F, usually 71 to 74°F
Forms a warm top layer around Apr 28, lasting about 176 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 Ashland County
- Beaver Lake0.7 miles away
- Seitz Lake2.2 miles away
- Lake Three3.3 miles away
- Moquah Lake3.5 miles away
- Mineral Lake3.9 miles away
- Long Lake4.7 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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