Turtle Lake
Bayfield County, Wisconsin · WBIC 2502900
Size
22 acres
Max depth
7 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
5 ft
Moderate, measured Sep 2021
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 1984), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5 ft Secchi depthModerateOlder reading
Last measured Sep 6, 2021. 33 readings on record, 2000 to 2021.
Typical summer clarity (June to September): 5.2 ft, moderate, from 7 readings (2014 to 2021).
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 Turtle Lake - Near Center. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 24 (Apr 17 to Apr 29)
- Surface reaches 48°Fabout Apr 29 (Apr 19 to May 2)
- Surface reaches 64°Fabout May 9 (May 5 to May 17)
- June surface74°F, usually 70 to 75°F
- July surface79°F, usually 78 to 81°F
- August surface74°F, usually 72 to 76°F
Forms a warm top layer around Jul 3, lasting about 38 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 Bayfield County
- Sand Bar Lake0.4 miles away
- George Lake0.5 miles away
- Ole Lake0.6 miles away
- Island Lake0.8 miles away
- Priest Lake0.9 miles away
- Tomahawk Lake0.9 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
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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