Deer Lake
Deer Lake in Lincoln County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar.
- Typical in August
- 68°F
- Public access
- Yes
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Why Deer Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Deer Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Deer Lake is a lake in Lincoln County, Wisconsin. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-05-11. Grade methodology: LakeQuality methodology.
Watch Deer Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Deer Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Where to stay near Deer Lake
Compare lakeside cabins, hotels, and vacation rentals near Deer Lake in Lincoln County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Deer Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Deer Lake typically sits around 68°F at the surface in August. Summer average is about 72°F. Usually warmest in Jul (about 75°F) and coldest in May (about 59°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 19 field readings (2024–2026) via the EPA Water Quality Portal. See the full Deer Lake water temperature breakdown →
Recreation & Access
- Deer LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Deer Lake
Graded lakes near Deer Lake
Deer Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Lincoln County
Frequently asked questions about Deer Lake
Where is Deer Lake?
- Deer Lake is a lake in Lincoln County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Deer Lake?
- Deer Lake in Lincoln County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Deer Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Deer Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Deer Lake?
- Deer Lake typically sits around 68°F at the surface in August, from 19 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
Are there boat ramps on Deer Lake?
- Deer Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Deer Lake. Public access is listed as yes.
Explore Deer Lake across LakeQuality
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Fish species and best lakes in Lincoln County
Species activity outlook by water temperature and season
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Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2022
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory