Frog Lake
Florence County, Wisconsin · WBIC 585700
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
27 acres
Max depth
21 ft
DNR lake type
Simple, Cool, dark water color
Water clarity
11 ft
Clear, measured Aug 2025
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 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
11 ft Secchi depthClear
Last measured Aug 25, 2025. 58 readings on record, 2007 to 2025.
Typical summer clarity (June to September): 10 ft, clear, from 33 readings (2012 to 2025).
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 Frog Lake - Deepest Part. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 17 (Apr 6 to Apr 23)
- Surface reaches 48°Fabout Apr 26 (Apr 16 to Apr 29)
- Surface reaches 64°Fabout May 18 (May 9 to May 24)
- June surface71°F, usually 69 to 72°F
- July surface77°F, usually 75 to 78°F
- August surface72°F, usually 71 to 74°F
Forms a warm top layer around May 4, lasting about 118 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
- Bass Lake0.4 miles away
- Ellwood Lake0.8 miles away
- Spring Lake0.8 miles away
- Railroad Lake1.9 miles away
- South Lake2.1 miles away
- Lake Anna2.2 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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