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Marl Lake
Enhanced dataHistorical depth chart
Marl LakeWaupaca County, WI
Historical source depth chart available17 converted source DNR map sheets can be panned and zoomed in the browser. Interactive contours stay hidden until visual QA passes. Historical survey — not for navigation.
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Fishing spots, food, lodging, marinas, and rentals around Marl Lake.
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Fishing forecast
Best windows for Marl Lake
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
Marl Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
72°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 Marl Lake - Deep Hole.
Sampled Aug 2025Volunteer monitoring since 1994
Clear, low-algae water — summer clarity of 13.5 ft puts it among the clearest quarter of monitored Wisconsin lakes.
Based on July–August volunteer averages from 2024–2025; each value shows its own year.Water claritySecchi disk depth
13.5 ftJul–Aug 2024 avg (2 readings)
ClearImproving — up ~18% vs earlier years
Clearer than 79% of 597 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
1.5 µg/LJul–Aug 2025 avg (2 readings)
Very lowStable since 2018
No recent nutrient readings — last measured 2018.
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 | — | 1.5 µg/L (2) | — |
| 2024 | 13.5 ft (2) | 1.5 µg/L (2) | — |
| 2023 | — | 2.0 µg/L (1) | — |
| 2022 | 15.8 ft (2) | 1.0 µg/L (1) | — |
| 2021 | 15.0 ft (1) | 2.0 µg/L (1) | — |
| 2020 | 10.7 ft (3) | 1.5 µg/L (2) | — |
| 2019 | 15.8 ft (3) | 2.0 µg/L (2) | — |
| 2018 | 11.0 ft (2) | 1.5 µg/L (2) | 13.0 µg/L (1) |
| 2017 | 12.3 ft (4) | 1.5 µg/L (2) | — |
| 2016 | 12.5 ft (4) | 0.7 µg/L (3) | — |
Latest individual samples: Secchi 14 ft (2025-06-15), chlorophyll-a 2 µg/L (2025-08-16), and total phosphorus 13 µg/L (2018-08-26).
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.
Marl Lake - Deep HoleStation 693098
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 maps17 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
Marl Lake depth maps
17 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Marl Lake · sheet 4
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 264100 · 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.
14surface acres
59max depth feet
0public access points
44.4279, -89.1829latitude, longitude
Access
Public access points
No mapped access points yet
LakeList has not matched a public launch, park, or shoreline access point for this lake yet.
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikeMuskyPanfishWalleye
Depth FAQ
How deep is Marl Lake?
Marl Lake is 59 feet deep at its deepest point and averages about 29 feet, according to Wisconsin DNR records.
Is there a free depth map of Marl Lake?
Yes. 17 scanned Wisconsin DNR lake survey map sheets are free to view and zoom on LakeList. These historical surveys are not for navigation.
Where does the Marl Lake depth map come from?
The map sheets are converted from official Wisconsin DNR lake survey documents, with the source URL, checksum, and retrieval date retained for every sheet. Historical surveys are 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