Delavan 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 1994), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

9.9 ft Secchi depthModerate

Last measured Sep 28, 2026. 800 readings on record, 1986 to 2026.

Typical summer clarity (June to September): 8.7 ft, moderate, from 140 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 Delavan Lake - Deep Hole. Checked Oct 23, 2026.

Water temperature

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 2024 (large fingerling); stocked in 7 years since 2010
• Black Crappielast stocked 2023 (large fingerling); stocked in 1 year since 2010
• Walleyelast stocked 2023 (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

• Bigmouth Buffalo Ictiobus cyprinellus1984; 4 records
• Black Bullhead Ameiurus melas1959 to 2006; 12 records
• Black Crappie Pomoxis nigromaculatus1959 to 2006; 38 records
• Bluegill Lepomis macrochirus1910 to 2006; 40 records
• Bluntnose Minnow Pimephales notatus1975; 1 record
• Brook Silverside Labidesthes sicculus1972 to 1975; 2 records
• Brown Bullhead Ameiurus nebulosus1984 to 2005; 3 records
• Channel Catfish Ictalurus punctatus1975 to 2002; 3 records
• Common Carp Cyprinus carpio1959 to 2005; 14 records
• Creek Chub Semotilus atromaculatus1984; 1 record
• Golden Shiner Notemigonus crysoleucas1972 to 1975; 2 records
• Green Sunfish Lepomis cyanellus1972 to 2006; 12 records
• Largemouth Bass Micropterus salmoides1966 to 2007; 33 records
• Muskellunge Esox masquinongy1996 to 2007; 15 records
• Northern Pike Esox lucius1934 to 2007; 41 records
• Pumpkinseed Lepomis gibbosus1910 to 2006; 31 records
• Redfin Pickerel Esox americanus2005; 1 record
• Rock Bass Ambloplites rupestris1959 to 2006; 19 records
• Smallmouth Bass Micropterus dolomieu1959 to 2006; 35 records
• Smallmouth Buffalo Ictiobus bubalus1959 to 1975; 4 records
• Walleye Sander vitreus1959 to 2007; 52 records
• White Bass Morone chrysops1959 to 1984; 12 records
• White Sucker Catostomus commersonii1959 to 2006; 15 records
• Yellow Bullhead Ameiurus natalis1975 to 2006; 13 records
• Yellow Perch Perca flavescens1959 to 2006; 26 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

• 1Delavan Lake Boat RampBoat ramp · Concrete Panels surface · Township
  Directions
• 2Lake Delavan Carry-InCarry-in access · Unimproved surface · Township
  Directions
• 3Blue Gill Road EndBoat ramp · Paved surface · Township
  Directions

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

Water level and flow

• DELAVAN LAKE INLET AT STATE HWY 50 AT LAKE LAWN,WIDischarge
• DELAVAN LAKE NEAR DELAVAN, WIGage height
• JACKSON CREEK AT MOUND ROAD NEAR ELKHORN, WIGage height, Discharge
• DELAVAN LAKE TRB @ S SHORE DR @ DELAVAN LAKE, WIDischarge
• DELAVAN LAKE OUTLET AT BORG ROAD NEAR DELAVAN, WIGage height, Discharge

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

More lakes in Walworth County

• Comus Lake2.9 miles away
• Como Lake6.0 miles away
• Geneva Lake6.0 miles away
• Silver Lake8.0 miles away
• Turtle Lake8.8 miles away
• Lake Wandawega9.3 miles away

All Walworth 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
• 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.