Fisher Lake
Iron County, WisconsinView mapDirections
Wisconsin DNR publishes the water-quality measurements for Fisher Lake. Here is what has been measured.
- Mesotrophic
- Public access
Fisher Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Phosphorus: 16.7 µg/L.
Fisher Lake is a mesotrophic lake in Iron County, Wisconsin. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 15 other monitored lakes in Iron County, Fisher Lake ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-25. Methodology: how these readings are compared.
What Fisher Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Fisher Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Fisher Lake
These are the measurements Wisconsin DNR publishes for Fisher Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7 ft. Phosphorus 16.7 µg/L. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 16.7µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Fisher Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Fisher Lake typically sits around 67°F at the surface in September. Summer average is about 73°F. Usually warmest in Aug (about 74°F) and coldest in Sep (about 67°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (67°F) to its warmest (74°F).
Typical surface water temperature by month, from 24 field readings (2024–2025) via the EPA Water Quality Portal. See the full Fisher Lake water temperature breakdown →
Recreation & Access
- Fisher LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Fisher Lake
Compare lakeside cabins, hotels, and vacation rentals near Fisher Lake in Iron 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 Fisher Lake
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Fishing Fisher Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Improving-1.3 µg/L/yr4 years
Nearby Lakes in Iron County
Frequently asked questions about Fisher Lake
Where is Fisher Lake?
- Fisher Lake is a lake in Iron County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Fisher Lake?
- Fisher Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Phosphorus: 16.7 µg/L.
Is Fisher Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Fisher Lake?
- Fisher Lake typically sits around 67°F at the surface in September, from 24 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Fisher Lake?
- Fisher Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Fisher Lake. Public access is listed as yes.
Can I fish at Fisher Lake?
- Fisher Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Fisher Lake across LakeQuality
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Iron County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northwoods Wisconsin area
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
Other Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
42 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX42 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- Turbidity in Water
Monitoring station identifiers (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory