School Section Lake
Waukesha County, Wisconsin · WBIC 825000
Size
117 acres
Max depth
8 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
5.6 ft
Moderate, measured Sep 2026
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
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1971), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5.6 ft Secchi depthModerate
Last measured Sep 15, 2026. 216 readings on record, 1987 to 2026.
Typical summer clarity (June to September): 5.6 ft, moderate, from 61 readings (2012 to 2026).
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 School Section Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
69.3°F surface, measured Sep 15, 2026
Measured near the surface (0.91 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 1 (Mar 26 to Apr 10)
- Surface reaches 48°Fabout Apr 10 (Apr 1 to Apr 18)
- Surface reaches 64°Fabout May 11 (May 3 to May 15)
- June surface75°F, usually 74 to 76°F
- July surface81°F, usually 78 to 82°F
- August surface77°F, usually 74 to 79°F
Mixes regularly through the summer instead of forming a warm top layer.
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.
Stocking history
- Northern Pikelast stocked 2020 (large fingerling); stocked in 9 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Boat landings
- 1School Section Lake Public AccessBoat ramp · Accessible features · County
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Waukesha County
- Scuppernong Creek Pond1.6 miles away
- Larkin Lake1.7 miles away
- Reagon Lake1.8 miles away
- Pretty Lake2.0 miles away
- Utica Lake2.5 miles away
- Hunters Lake2.5 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
- Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Measured temperatureWisconsin 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
- Depth map linkWisconsin DNR lake maps list, 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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