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Lake Geneva
Enhanced dataInteractive depth contours
Lake GenevaWalworth County, WI
Contours load with map Access
Interactive depth contours10-foot typical interval · Sonar-derived depth (C-MAP Genesis) · Gaps interpolated · Not for navigation
Source: C-MAP Genesis community sonar (derived)high confidence · QA passed · Select a contour to inspect its mapped depthDepths decoded from C-MAP Genesis Social Map community sonar recordings (used with permission), covering 87% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 135-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Lake Geneva.
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Fishing forecast
Best windows for Lake Geneva
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Lake Geneva water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
74°FWarm
Seasonal estimate. Checking current National Weather Service air temperatures…
Comfortable summer pattern. Bass and panfish are active; early and late hours beat the midday heat.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Geneva Lake - Deep Hole-Site A.
Sampled Apr 2026
Very clear, low-algae water — summer clarity of 21.1 ft puts it among the clearest tenth of monitored Wisconsin lakes.
Based on July–August 2025 averages across 4 volunteer readings.37Oligotrophic5-yr summer TSI
Very clear, low-nutrient water — often deep, with limited plant growth.
Water claritySecchi disk depth
21.1 ftJul–Aug 2025 avg (2 readings)
Crystal clear2021–2025
Clearer than 99% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
2 µg/LJul–Aug 2025 avg (2 readings)
Very lowImproving — down ~25% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
11 µg/LLatest single sample · 2023-06-21
LowLow phosphorus means light plant/algae growth pressure.
All readings by year · station details · methodology
Summer averages (July/August)
July/August means; counts in parentheses show how many samples went into each average.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2025 | 21.1 ft (2) | 2.0 µg/L (2) | — |
| 2024 | — | 2.0 µg/L (2) | — |
| 2023 | — | 2.0 µg/L (2) | — |
| 2022 | 22.7 ft (2) | 2.0 µg/L (2) | — |
| 2021 | 19.4 ft (2) | 3.0 µg/L (2) | 13.0 µg/L (1) |
| 2020 | — | 3.0 µg/L (1) | — |
| 2019 | — | 2.0 µg/L (2) | — |
| 2018 | — | 2.0 µg/L (2) | — |
| 2017 | — | 2.0 µg/L (2) | — |
| 2016 | — | 0.5 µg/L (2) | — |
Latest individual samples: Secchi 25.6 ft (2026-04-22), chlorophyll-a 7 µg/L (2026-02-10), and total phosphorus 11 µg/L (2023-06-21).
Secchi clarity is how deep a black-and-white disk stays visible from the surface — more feet means clearer water.
Chlorophyll-a is an algae pigment; higher values signal more algae in the water column.
Total phosphorus is a nutrient that feeds algae and aquatic plants. It is not a weed survey — depth, bottom type, water movement, and management change the actual lake experience.
Geneva Lake - Deep Hole-Site AStation 653122 · TSI based on chlorophyll
Modeled from DNR/CLMN monitoring — not a safety or swim-condition report. Verify current conditions locally. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps3 converted map sheetsView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Lake Geneva depth maps
3 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Geneva Lake · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 758300 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
Wisconsin DNR fisheries survey
Fish population survey
Structured LakeList extraction from the 2015 DNR fisheries survey. Population estimates, density, and catch-rate indices use different units, methods, and scopes, so each value is presented in its original form rather than normalized against a different measure.
Survey indicatorsValues keep their source unit and method; unlike measures are not scaled or compared.
Management contextGeneva Lake (WBIC 758300) only
Human-reviewed 2015 netting, electrofishing, population, catch-rate and size-structure metrics for Geneva Lake.
- Historical survey snapshot; not current regulations or navigation guidance.
- Only explicit fish-population observations and estimates were promoted; management targets, stocking rows, creel metrics, comparison-water values and unsupported chart-only values were excluded.
- Metric source pages, survey years, methods, units and exact report waterbody scope are retained.
Black Crappie
2 fish2015 catch count · p. 172 fish2015 measured count · p. 171.3 fish/mile2015 electrofishing cpue · p. 1711.1 inches2015 mean length · p. 17
Bluegill
46 fish2015 catch count · p. 1346 fish2015 measured count · p. 1330.7 fish/mile2015 electrofishing cpue · p. 134.7 inches2015 mean length · p. 13
Bowfin
6 fish2015 catch count · p. 174 fish/mile2015 electrofishing cpue · p. 17
Brown Bullhead
2 fish2015 catch count · p. 171.3 fish/mile2015 electrofishing cpue · p. 17
Brown Trout
2 fish2015 catch count · p. 172 fish2015 measured count · p. 170.2 fish/mile2015 electrofishing cpue · p. 1711.6 inches2015 mean length · p. 17
Lake Trout
142 fish2015 catch count · p. 16140 fish2015 measured count · p. 167.9 fish/net-night2015 fyke net cpue · p. 1627.5 inches2015 mean length · p. 16
Lake Trout (female)
16 fish2015 catch count · p. 1616 fish2015 measured count · p. 160.9 fish/net-night2015 fyke net cpue · p. 1627.6 inches2015 mean length · p. 16
Lake Trout (male)
39 fish2015 catch count · p. 1639 fish2015 measured count · p. 162.2 fish/net-night2015 fyke net cpue · p. 1627 inches2015 mean length · p. 16
Lake Trout (unknown sex)
87 fish2015 catch count · p. 1685 fish2015 measured count · p. 164.8 fish/net-night2015 fyke net cpue · p. 1627.7 inches2015 mean length · p. 16
Largemouth Bass
153 fish2015 catch count · p. 12153 fish2015 measured count · p. 1215.3 fish/mile2015 electrofishing cpue · p. 1213.5 inches2015 mean length · p. 12
Muskellunge
58 fish2015 catch count · p. 956 fish2015 measured count · p. 90.4 fish/net-night2015 fyke net cpue · p. 936.6 inches2015 mean length · p. 9
Muskellunge (female)
3 fish2015 catch count · p. 93 fish2015 measured count · p. 90.1 fish/net-night2015 fyke net cpue less than · p. 936.6 inches2015 mean length · p. 9
Muskellunge (male)
26 fish2015 catch count · p. 925 fish2015 measured count · p. 90.2 fish/net-night2015 fyke net cpue · p. 932.2 inches2015 mean length · p. 9
Muskellunge (unknown sex)
29 fish2015 catch count · p. 928 fish2015 measured count · p. 90.2 fish/net-night2015 fyke net cpue · p. 935.2 inches2015 mean length · p. 9
Northern Pike
72 fish2015 bycatch count · p. 1716 fish2015 bycatch measured count · p. 170.5 fish/net-night2015 bycatch fyke net cpue · p. 1726.9 inches2015 bycatch mean length · p. 17
Pumpkinseed
8 fish2015 catch count · p. 178 fish2015 measured count · p. 175.3 fish/mile2015 electrofishing cpue · p. 176.1 inches2015 mean length · p. 17
Rock Bass
32 fish2015 catch count · p. 1732 fish2015 measured count · p. 1721.3 fish/mile2015 electrofishing cpue · p. 176.7 inches2015 mean length · p. 17
Smallmouth Bass
16 fish2015 bycatch count · p. 171 fish2015 bycatch measured count · p. 170.1 fish/net-night2015 bycatch fyke net cpue · p. 1719.2 inches2015 bycatch max length · p. 17
Walleye
934 fish2015 catch count · p. 5394 fish2015 measured count · p. 56.7 fish/net-night2015 fyke net cpue · p. 521.4 inches2015 mean length · p. 5
Walleye (female)
649 fish2015 catch count · p. 5280 fish2015 measured count · p. 54.7 fish/net-night2015 fyke net cpue · p. 524.3 inches2015 mean length · p. 5
Walleye (male)
252 fish2015 catch count · p. 595 fish2015 measured count · p. 51.8 fish/net-night2015 fyke net cpue · p. 515.2 inches2015 mean length · p. 5
Walleye (unknown sex)
33 fish2015 catch count · p. 523 fish2015 measured count · p. 50.2 fish/net-night2015 fyke net cpue · p. 511.4 inches2015 mean length · p. 5
Yellow Perch
35 fish2015 catch count · p. 1535 fish2015 measured count · p. 1523.3 fish/mile2015 electrofishing cpue · p. 155.4 inches2015 mean length · p. 15
Geneva Lake comprehensive fisheries survey, 2015Matched by exact wbic county waterbody alias · WBICs 758300 · verified 2026-07-20Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public report with source attribution.
Wisconsin DNR · 2026–2027 season
Lake-specific fishing regulations
Rule text published by the DNR for this waterbody, cached by WBIC and verified 2026-07-12.
All species
Catch and release fishing for largemouth and smallmouth bass is open year round unless otherwise noted. Motor Trolling is allowed with up to 3 hooks, baits, or lures, per angler.
Catfish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 10.
Cisco and whitefish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 10.
Lake sturgeon
Season Dates: Closed. No fishing allowed.
Largemouth and smallmouth bass
Season Dates: May 2, 2026 to March 7, 2027. The minimum length limit is 14" and the daily bag limit is 5.
Muskellunge and hybrids
Season Dates: May 2, 2026 to December 31, 2026 on open water. The minimum length limit is 50" and the daily bag limit is 1.
Northern pike
Season Dates: May 2, 2026 to March 7, 2027. No minimum length limit and the daily bag limit is 5.
Paddlefish
Season Dates: Closed. No fishing allowed.
Panfish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 25.
Rock, yellow, and white bass
Season Dates: Open All Year. No minimum length limit and the daily bag limit is unlimited.
Rough fish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is unlimited.
Shovelnose sturgeon
Season Dates: Closed. No fishing allowed.
Trout and salmon
See Trout regulations layer.
Urban waters gamefish
This waterbody is not considered an urban water, Urban Waters Gamefish regulations do not apply.
Walleye, sauger, and hybrids
Season Dates: May 2, 2026 to March 7, 2027. The minimum length limit is 18" and the daily bag limit is 3.
Regulations can change. The official DNR page controls; verify seasons, boundaries, bag limits, and emergency rules before fishing.
5,401surface acres
135max depth feet
6public access points
42.5683, -88.4811latitude, longitude
Access
Public access points
Boat launchChapin Road Access (Walk-in / Carry-In)42.57370, -88.49205Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchLake Geneva Access42.55056, -88.57264Managed by VILLAGEVILLAGE OF FONTANA ON GENEVARamp surface: ConcreteADA-accessible feature: YesVerified 2026-07-12
Boat launchLake Geneva Boat Launch42.58870, -88.43376Managed by CITYCITY OF LAKE GENEVARamp surface: ConcreteADA-accessible feature: NoVerified 2026-07-12
Boat launchLake Geneva - Hillside Road42.55811, -88.46242Managed by TOWNSHIPTOWN OF LINNRamp surface: Concrete PlankADA-accessible feature: YesVerified 2026-07-12
Boat launchLinn Road Access (Town of Linn)42.56377, -88.48252Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchWilliams Bay Access (Village of Williams Bay)42.57848, -88.53587Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Smallmouth BassLargemouth BassNorthern PikePanfishTroutWalleye
Depth FAQ
How deep is Lake Geneva?
Lake Geneva is 135 feet deep at its deepest point and averages about 61 feet, according to Wisconsin DNR records.
Is there a free depth map of Lake Geneva?
Yes. LakeList publishes a free interactive depth contour map of Lake Geneva at a typical 10-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Lake Geneva depth map come from?
The interactive depth contours are derived from C-MAP Genesis community sonar (derived). Each contour set passes a visual QA review against the source document before it is published. The depths are derived from community sonar recordings (C-MAP Genesis Social Map, used with permission), with gaps between recordings interpolated; not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14
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