Breakfast Lake
Breakfast Lake in Bayfield County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12.5 ft visibility. Phosphorus: 10.7 µg/L. Maximum depth: 19 ft. Surface area: 11 acres.
- Clarity
- 12.5 ft
- Typical in August
- 76°F
- Max depth
- 19 ft
- Area
- 11 acres
- Trend
- ↑ Improving
Next lake in Bayfield County
Why Breakfast Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Breakfast Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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.
Breakfast Lake is a 11-acre lake in Bayfield County, Wisconsin with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-02. Grade methodology: LakeGrade methodology.
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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 Breakfast Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 12.5 ft. Phosphorus level: 10.7 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.5 ft | Not graded |
| Phosphorus | 10.7 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Breakfast Lake
Compare lakeside cabins, hotels, and vacation rentals near Breakfast Lake in Bayfield 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 Breakfast Lake
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Water Temperature
Breakfast Lake typically sits around 76°F at the surface in August. Summer average is about 74°F. Usually warmest in Aug (about 76°F) and coldest in Apr (about 58°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 62 field readings (2024–2026) via the EPA Water Quality Portal. See the full Breakfast Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Surface Area | 11 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Breakfast 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2007. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.446 m/yr | 7 |
Graded lakes near Breakfast Lake
Breakfast Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Bayfield County
Frequently asked questions about Breakfast Lake
What is the water quality grade for Breakfast Lake?
- Breakfast Lake in Bayfield County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12.5 ft visibility. Phosphorus: 10.7 µg/L. Maximum depth: 19 ft. Surface area: 11 acres.
Is Breakfast Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Breakfast 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 Breakfast Lake?
- Breakfast Lake typically sits around 76°F at the surface in August, from 62 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Breakfast Lake?
- Breakfast Lake has a maximum depth of 19 feet. The lake covers 11 acres.
What fish are in Breakfast Lake?
- Fish species found in Breakfast Lake include Panfish, Largemouth Bass. Breakfast Lake is located in Bayfield County, Wisconsin.
Explore Breakfast Lake across LakeGrade
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Where this data comes from
76 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_WQX76 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
Fish and recreation data from Wisconsin DNR Lakes