Loon Lake
Florence County, Wisconsin · WBIC 672700
Size
53 acres
Max depth
55 ft
DNR lake type
Simple, Warm, clear water color
Water clarity
24 ft
Clear, measured Sep 2018
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 1962), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
24 ft Secchi depthClearOlder reading
Last measured Sep 3, 2018. 106 readings on record, 1994 to 2018.
Typical summer clarity (June to September): 15.2 ft, clear, from 27 readings (2012 to 2018).
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 LOON LAKE - DEEP SPOT. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 17 (Apr 6 to Apr 25)
- Surface reaches 48°Fabout Apr 28 (Apr 18 to May 2)
- Surface reaches 64°Fabout May 18 (May 10 to May 25)
- June surface71°F, usually 69 to 72°F
- July surface76°F, usually 75 to 78°F
- August surface73°F, usually 72 to 75°F
Forms a warm top layer around Apr 25, lasting about 184 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 Florence County
- Grass Lake0.8 miles away
- Sea Lion Lake0.9 miles away
- Keyes Lake0.9 miles away
- Little Emily Lake1.6 miles away
- Bessie Babbet Lake1.6 miles away
- Emily 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
- 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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