Simpson Lake
Marinette County, Wisconsin · WBIC 527600
Size
13 acres
Max depth
24 ft
DNR lake type
Simple, Trout Pond
Water clarity
13 ft
Clear, measured Jul 2008
A small pond type the DNR groups with trout waters. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1972), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
13 ft Secchi depthClearOlder reading
Last measured Jul 23, 2008. 5 readings on record, 2007 to 2008.
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 Simpson Lake - Deepest Spot. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 7 (Apr 1 to Apr 20)
- Surface reaches 48°Fabout Apr 18 (Apr 11 to Apr 25)
- Surface reaches 64°Fabout May 13 (May 9 to May 23)
- June surface73°F, usually 71 to 74°F
- July surface79°F, usually 77 to 80°F
- August surface75°F, usually 73 to 76°F
Forms a warm top layer around Apr 24, lasting about 150 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 Marinette County
- Newton Lake3.1 miles away
- Little Newton Lake3.2 miles away
- Retcof Lake3.5 miles away
- Engleman Lake3.9 miles away
- Butterfly Lake4.3 miles away
- Elbow Lake4.4 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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