Manitou Lake is a mesotrophic lake in Leelanau County, Michigan. Water quality is graded A based on 2 sampling years through 2024. Water clarity is improving over recent sampling years. Compared to the 20 other monitored lakes in Leelanau County, Manitou Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2024-09-04. Grade methodology: LakeGrade methodology.
Watch Manitou Lake water quality
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 13.3 ft. Phosphorus level: 13.5 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.3 ft | B |
| Phosphorus | 13.5 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Manitou Lake
Compare lakeside cabins, hotels, and vacation rentals near Manitou Lake in Leelanau County, Michigan — 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 Manitou Lake
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Fishing Manitou Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.311 m/yr | 5 |
| Phosphorus | ↓ Declining | +2.37 µg/L/yr | 4 |
Water Temperature
Manitou Lake averages about 65°F at the surface in summer, usually warmest in Jul (about 66°F) and coldest in Jun (about 62°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 830 field readings (2010–2024) via the EPA Water Quality Portal. See the full Manitou Lake water temperature breakdown →
Location
County Ranking
Ranked #11 of 21 lakes in Leelanau County
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Moderate nutrients, good water quality
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More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-04
Monitoring stations: 1