Okauchee Lake
Waukesha County, Wisconsin · WBIC 850300
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
1,187 acres
Max depth
94 ft
DNR lake type
Complex, Two Story
Water clarity
7.7 ft
Moderate, measured Aug 2026
A deep lake type that can hold a cold layer below the warm surface in 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 1976), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
7.7 ft Secchi depthModerate
Last measured Aug 28, 2026. 8 readings on record, 2024 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 Okauchee Lake Deep Hole USGS. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Mar 29 (Mar 18 to Apr 5)
- Surface reaches 48°Fabout Apr 24 (Apr 17 to May 3)
- Surface reaches 64°Fabout May 13 (May 9 to May 21)
- June surface77°F, usually 77 to 79°F
- July surface84°F, usually 82 to 85°F
- August surface80°F, usually 77 to 82°F
Forms a warm top layer around Apr 22, lasting about 195 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.
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 14 years since 2010
- Walleyelast stocked 2025 (large fingerling and small fingerling); stocked in 8 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
- Banded Killifish Fundulus diaphanus2021; 1 record
- Black Crappie Pomoxis nigromaculatus1966 to 2023; 5 records
- Bluegill Lepomis macrochirus2019 to 2024; 130 records
- Cisco Coregonus artedi1909; 4 records
- Common Carp Cyprinus carpio2017 to 2021; 4 records
- Green Sunfish Lepomis cyanellus2020 to 2023; 25 records
- Longnose Gar Lepisosteus osseus2024; 1 record
- Muskellunge Esox masquinongy2022; 1 record
- Northern Pike Esox lucius2021 to 2024; 5 records
- Pumpkinseed Lepomis gibbosus2019 to 2022; 35 records
- Rainbow Darter Etheostoma caeruleum2021; 1 record
- Rock Bass Ambloplites rupestris2020 to 2023; 18 records
- Smallmouth Bass Micropterus dolomieu2021; 1 record
- Yellow Bullhead Ameiurus natalis2020; 1 record
- Yellow Perch Perca flavescens2019 to 2024; 7 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
- 1Moose Lake Public AccessBoat ramp · Concrete Panels surface · Accessible features · State(dnr)
Directions - 2Okauchee Lake Public AccessBoat ramp · Concrete Panels surface · Accessible features · State(dnr)
Directions - Okauchee Lake Boat LandingBoat ramp · Concrete surface · Accessible features · State(dnr)
Some landings are matched to this lake by name only, because the DNR list gives no location for them. They have no pin.
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Fishing from shore
- Moose Lake Fishing PierDirections · DNR details
Wisconsin DNR shore fishing sites. Checked Oct 24, 2026.
More lakes in Waukesha County
- Garvin Lake0.9 miles away
- Grass Lake1.0 miles away
- Florence Lake1.1 miles away
- Moose Lake1.5 miles away
- Tamarack Lake1.5 miles away
- Oconomowoc Lake, Upper1.5 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
- 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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