Florence Lake is a mesotrophic lake in Leelanau County, Michigan. Water quality is graded B based on 2 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 20 other monitored lakes in Leelanau County, Florence Lake ranks #14 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2024-09-05. Grade methodology: LakeGrade methodology.
Watch Florence Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8.6 ft. Phosphorus level: 17.2 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.6 ft | C |
| Phosphorus | 17.2 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Florence Lake
Compare lakeside cabins, hotels, and vacation rentals near Florence 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 Florence Lake
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Fishing Florence Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.002 m/yr | 5 |
| Phosphorus | ↓ Declining | +1.74 µg/L/yr | 5 |
Water Temperature
Florence Lake averages about 72°F at the surface in summer, usually warmest in Jul (about 74°F) and coldest in Jun (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 531 field readings (2010–2024) via the EPA Water Quality Portal. See the full Florence Lake water temperature breakdown →
Location
County Ranking
Ranked #14 of 21 lakes in Leelanau County
Cleaner Lakes Within 30 Miles
Florence Lake holds Grade B. 3 nearby lakes hold higher grades.
- AManitou LakeLeelanau County · 9.5 mi · Higher grade (B → A)
- AShell LakeLeelanau County · 11.6 mi · Higher grade (B → A)
- ANorth Bar LakeLeelanau County · 11.9 mi · Higher grade (B → A)
Nearby Lakes in Leelanau County
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Moderate nutrients, good water quality
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Mesotrophic Lakes in Michigan
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: 2024-09-05
Monitoring stations: 1