Porcupine Lake
Florence County, Wisconsin · WBIC 590800
Size
40 acres
Max depth
20 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
11 ft
Clear, measured Aug 2024
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 1991), 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 18, 2024. 76 readings on record, 2007 to 2024.
Typical summer clarity (June to September): 10.5 ft, clear, from 39 readings (2012 to 2024).
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 Porcupine Lake - Deepest Spot. Checked Oct 23, 2026.
Water temperature
Last measured Aug 18, 2024, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 22 (Apr 16 to Apr 29)
- Surface reaches 48°Fabout Apr 26 (Apr 20 to May 3)
- Surface reaches 64°Fabout May 20 (May 13 to May 25)
- June surface70°F, usually 68 to 71°F
- July surface75°F, usually 74 to 77°F
- August surface71°F, usually 70 to 73°F
Forms a warm top layer around May 15, lasting about 109 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.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). 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
- Lake of Dreams2.3 miles away
- Little Porcupine Lake3.4 miles away
- Duck Lake3.5 miles away
- Reisner Lake3.5 miles away
- Wisconsin Slough3.6 miles away
- Lost Lake4.1 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
- 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.
Something wrong on this page? Report a problem.