Lower Nemahbin Lake
Waukesha County, Wisconsin · WBIC 827000
Size
271 acres
Max depth
36 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
15 ft
Clear, measured Oct 2025
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 1976), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
15 ft Secchi depthClear
Last measured Oct 14, 2025. 199 readings on record, 2000 to 2025.
Typical summer clarity (June to September): 10 ft, clear, from 143 readings (2012 to 2025).
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 Lower Nemahbin Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
Last measured Aug 24, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 9 (Mar 30 to Apr 14)
- Surface reaches 48°Fabout Apr 24 (Apr 12 to Apr 30)
- Surface reaches 64°Fabout May 13 (May 9 to May 23)
- June surface75°F, usually 73 to 76°F
- July surface81°F, usually 79 to 82°F
- August surface77°F, usually 74 to 79°F
Forms a warm top layer around May 4, lasting about 162 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.
Stocking history
- Walleyelast stocked 2024 (large fingerling and small fingerling); stocked in 8 years since 2010
- Rainbow Troutlast stocked 2020 (yearling); stocked in 1 year since 2010
- Northern Pikelast stocked 2017 (large fingerling); stocked in 7 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 nigromaculatus1954 to 2006; 6 records
- Bluegill Lepomis macrochirus1954 to 2006; 7 records
- Bluntnose Minnow Pimephales notatus2000 to 2006; 2 records
- Bowfin Amia calva1954 to 2006; 3 records
- Brown Bullhead Ameiurus nebulosus1973; 1 record
- Common Carp Cyprinus carpio1954; 1 record
- Johnny Darter Etheostoma nigrum2000; 1 record
- Largemouth Bass Micropterus salmoides1954 to 2006; 8 records
- Longnose Gar Lepisosteus osseus1954 to 1967; 2 records
- Northern Pike Esox lucius1954 to 2006; 3 records
- Pumpkinseed Lepomis gibbosus1954 to 1973; 3 records
- Rainbow Trout Oncorhynchus mykiss1973; 1 record
- Rock Bass Ambloplites rupestris1954 to 2006; 7 records
- Smallmouth Bass Micropterus dolomieu1967 to 2006; 4 records
- Walleye Sander vitreus1954 to 2006; 5 records
- White Bass Morone chrysops1954; 1 record
- White Sucker Catostomus commersonii1954 to 2006; 3 records
- Yellow Bass Morone mississippiensis1967; 1 record
- Yellow Bullhead Ameiurus natalis1954 to 1967; 2 records
- Yellow Perch Perca flavescens1954 to 2006; 5 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
- 1Lower Nemahbin Lake Carry-In AccessCarry-in access · Unimproved surface · Accessible features · State(dnr)
Directions - 2Nemahbin Lakes Boat RampBoat ramp · Concrete Panels surface · County
Directions - Lower Nemahbin Lake Public AccessCarry-in access · 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.
More lakes in Waukesha County
- Bowron Lake0.8 miles away
- Applebecker Millpond1.0 miles away
- Crooked Lake1.2 miles away
- Upper Nemahbin Lake1.2 miles away
- Duck Lake1.7 miles away
- Upper Genesee Lake1.7 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
- 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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