Weyers Lake
Manitowoc County, WisconsinEutrophic
Weyers Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. High phosphorus is the leading drag on the score — likely from upland agriculture, lawn runoff, or in-lake sediment release.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake bottoms out at 32 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 6 acres, with partial shoreline records and little volume to buffer nutrient inputs. Weyers Lake ranks 17 of 18 in Manitowoc County — at the lower end of the locally monitored distribution.
No invasive species are currently listed at Weyers Lake — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 2 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-08-20. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Crystal clear, you can see 21.3 ft down. Phosphorus level: 92.3 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 21.3 ft | A |
| Phosphorus | 92.3 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 32 ft |
| Surface Area | 6 acres |
| Public Access | Yes |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Weyers Lake (14-day solunar calendar)
→ Is it safe to eat fish from Weyers Lake? (mercury & PFAS guide)
→ Weyers Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.089 m/yr | 7 |
| Phosphorus | ↑ Improving | -9.15 µg/L/yr | 6 |
Recreation & Access
Location
County Ranking
Ranked #17 of 18 lakes in Manitowoc County
Nearby Lakes in Manitowoc County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Fish and recreation data from Wisconsin DNR Lakes
Most recent sample: 2024-08-20
Monitoring stations: 1