Is Forest Lake Safe for Swimming?
Forest Lake in Washington County, Minnesota has nutrient and algae measurements on record from state and federal monitoring. Chlorophyll-a in the monitoring record runs high enough that algae is a factor. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 5.1 ft visibility. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 16.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 5.1 ft |
| Phosphorus | 28 μg/L |
| Chlorophyll-a (Algae) | 16.5 μg/L |
| Maximum Depth | 37 ft |
| Location | Washington County, Minnesota |
How does Forest Lake compare?
On nutrient and algae readings, Forest Lake runs above the Minnesota state average. It ranks #54 of 75 lakes in Washington County on nutrient and algae readings.
Water clarity (Secchi depth) sits at 5.1 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 16.5 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.
Stays via Stay22
Where to stay near Forest Lake
Compare cabins, hotels, and vacation rentals near Forest Lake in Washington County, Minnesota. Live availability and prices for your nights. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Forest Lake
Prices for Nov 6–8, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Forest Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Forest Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Forest Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.