Berry Lake
Berry Lake in Oconto County, Wisconsin has a water quality grade of B (Good). Water clarity: 7.5 ft visibility. Phosphorus: 15.4 µg/L. Maximum depth: 27 ft. Surface area: 209 acres.
Wisconsin DNR lists Largemouth Bass as common on Berry Lake. DNR survey details →
- Clarity
- 7.5 ft
- Typical in August
- 76°F
- Max depth
- 27 ft
- Area
- 209 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Berry Lake is a 209-acre mesotrophic lake in Oconto County, Wisconsin with a maximum depth of 27 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 38 other monitored lakes in Oconto County, Berry Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-23. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Moderate clarity, visible to about 7.5 ft. Phosphorus level: 15.4 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.5 ft | Not graded |
| Phosphorus | 15.4 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Berry Lake
Compare lakeside cabins, hotels, and vacation rentals near Berry Lake in Oconto 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 Berry Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Berry Lake typically sits around 76°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 77°F) and coldest in Jun (about 69°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 14 field readings (2024–2026) via the EPA Water Quality Portal. See the full Berry Lake water temperature breakdown →
Wisconsin DNR lists Largemouth Bass as common on Berry Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Berry Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1999. 20 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 27 ft |
| Surface Area | 209 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Berry LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Berry Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.339 m/yr | 7 |
| Phosphorus | → Stable | -0.13 µg/L/yr | 7 |
County Ranking
Ranked #6 of 39 lakes in Oconto County
Nearby Lakes in Oconto County
Frequently asked questions about Berry Lake
Where is Berry Lake?
- Berry Lake is a lake in Oconto County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Berry Lake?
- Berry Lake in Oconto County, Wisconsin has a water quality grade of B (Good). Water clarity: 7.5 ft visibility. Phosphorus: 15.4 µg/L. Maximum depth: 27 ft. Surface area: 209 acres.
Is Berry Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Berry Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Berry Lake?
- Berry Lake typically sits around 76°F at the surface in August, from 14 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Berry Lake?
- Berry Lake has a maximum depth of 27 feet. The lake covers 209 acres.
What fish are in Berry Lake?
- Fish species found in Berry Lake include Panfish, Largemouth Bass, Northern Pike. Berry Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Berry Lake?
- Wisconsin DNR lists Largemouth Bass as common on Berry Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Berry Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Berry Lake?
- Berry Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Berry Lake. Public access is listed as yes.
Explore Berry Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Oconto County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Moderate nutrients, good water quality
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
42 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX42 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
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)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory