Nagawicka Lake

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

7.5 ft Secchi depthModerate

Last measured Sep 9, 2026. 372 readings on record, 1986 to 2026.

Typical summer clarity (June to September): 9.7 ft, moderate, from 72 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 Nagawicka Lake - Deep Hole. Checked Oct 23, 2026.

Water temperature

75°F surface, measured Sep 9, 2026

Measured near the surface (0.91 m down). A single reading, not a daily value.

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 2025 (large fingerling and small fingerling); stocked in 12 years since 2010
• Rainbow Troutlast stocked 2020 (yearling); stocked in 1 year since 2010
• Northern Pikelast stocked 2017 (large fingerling); stocked in 4 years since 2010
• Yellow Perchlast stocked 2013 (large fingerling); stocked in 1 year 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

• Northern Hog Sucker Hypentelium nigricans2021; 2 records
• Northern Pike Esox lucius2021; 2 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

• 1Nagawicka Lake Boat LaunchBoat ramp · Concrete Plank surface · Accessible features · County
  Directions

Wisconsin DNR public boat access sites. Checked Oct 23, 2026.

Water level and flow

• BARK RIVER AT DELAFIELD, WIDischarge

U.S. Geological Survey gauges at or beside this lake. Readings are provisional and fetched when you open the page.

More lakes in Waukesha County

• Applebecker Millpond1.9 miles away
• Upper Nashotah Lake2.0 miles away
• Forest Lake2.1 miles away
• Upper Nemahbin Lake2.2 miles away
• Lower Nashotah Lake2.2 miles away
• Grass Lake2.7 miles away

All Waukesha County lakes

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
• Water level and flowU.S. Geological Survey gauges (readings are live), 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.