Pewaukee Lake
Waukesha County, Wisconsin · WBIC 772000
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
2,493 acres
Max depth
45 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
8.5 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 1994), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
8.5 ft Secchi depthModerate
Last measured Sep 14, 2026. 512 readings on record, 1981 to 2026.
Typical summer clarity (June to September): 8.5 ft, moderate, from 83 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 PEWAUKEE LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
73.8°F surface, measured Sep 14, 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 2 (Mar 27 to Apr 10)
- Surface reaches 48°Fabout Apr 24 (Apr 13 to Apr 30)
- Surface reaches 64°Fabout May 24 (May 15 to May 27)
- June surface75°F, usually 74 to 77°F
- July surface82°F, usually 80 to 84°F
- August surface78°F, usually 76 to 80°F
Forms a warm top layer around May 28, lasting about 115 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 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
- Muskellungelast stocked 2025 (large fingerling and yearling); stocked in 16 years since 2010
- Walleyelast stocked 2024 (fry, large fingerling and small fingerling); stocked in 10 years since 2010
- Northern Pikelast stocked 2019 (large fingerling); stocked in 6 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.
Fish recorded near this lake
- Black Crappie Pomoxis nigromaculatus1999 to 2004; 10 records
- Bluegill Lepomis macrochirus1999 to 2004; 10 records
- Bluntnose Minnow Pimephales notatus2000 to 2002; 3 records
- Brown Bullhead Ameiurus nebulosus1999; 1 record
- Central Mudminnow Umbra limi2000; 1 record
- Common Carp Cyprinus carpio1999 to 2004; 4 records
- Emerald Shiner Notropis atherinoides2002; 1 record
- Freshwater Drum Aplodinotus grunniens1999 to 2004; 3 records
- Golden Shiner Notemigonus crysoleucas2000 to 2003; 2 records
- Green Sunfish Lepomis cyanellus2000 to 2004; 7 records
- Iowa Darter Etheostoma exile2000; 1 record
- Largemouth Bass Micropterus salmoides1999 to 2004; 15 records
- Muskellunge Esox masquinongy1999 to 2004; 10 records
- Northern Pike Esox lucius1999 to 2004; 5 records
- Pumpkinseed Lepomis gibbosus1960 to 2026; 13 records
- Rock Bass Ambloplites rupestris2000 to 2004; 11 records
- Smallmouth Bass Micropterus dolomieu1999 to 2004; 6 records
- Walleye Sander vitreus1999 to 2004; 11 records
- Yellow Bullhead Ameiurus natalis2002 to 2004; 3 records
- Yellow Perch Perca flavescens1999 to 2004; 8 records
Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.
Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.
Boat landings
- 1Pewaukee Lake Boat RampBoat ramp · Concrete Plank surface · Accessible features · County
Directions - 2Pewaukee LakeBoat ramp · Concrete surface · City
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Fishing from shore
- PEWAUKEE LAKE FISHING PIERDirections · DNR details
Wisconsin DNR shore fishing sites. Checked Oct 24, 2026.
More lakes in Waukesha County
- Etter Lake2.4 miles away
- Nagawicka Lake4.2 miles away
- Beaver Lake4.7 miles away
- Pine Lake5.0 miles away
- Merton Millpond5.4 miles away
- Forest Lake5.5 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
- Fish recordedOpen fish survey and museum records, via GBIF, checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Shore fishing sitesWisconsin DNR shore fishing sites, 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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