Portaferry Lake
St. Lawrence County, New York78 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- 80 ft max depth
Portaferry Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 80.1 ft. Surface area: 78 acres.
Portaferry Lake is a 78-acre lake in St. Lawrence County, New York with a maximum depth of 80 feet (32-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What Portaferry Lake is good for
From access and monitoring records, not editorial picks.
- Deep water80.1 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Portaferry Lake is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Portaferry Lake
These are the measurements NY DEC publishes for Portaferry Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Portaferry Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
80.1 ft
Average depth
31.5 ft
Surface area
78 acres
Shoreline
2.3 mi
Stays via Stay22
Stays near Portaferry Lake
Compare lakeside cabins, hotels, and vacation rentals near Portaferry Lake in St. Lawrence County, New York — 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 Portaferry Lake
Prices for Oct 16–18, 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 whole trip? See where to stay at New York’s top lakes →
Follow Portaferry Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Portaferry Lake
Nearby Lakes in St. Lawrence County
Frequently asked questions about Portaferry Lake
Where is Portaferry Lake?
- Portaferry Lake is a lake in St. Lawrence County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Portaferry Lake?
- Portaferry Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 80.1 ft. Surface area: 78 acres.
Is Portaferry Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Portaferry Lake?
- Portaferry Lake has a maximum depth of 80.1 feet and an average depth of 31.5 feet. The lake covers 78 acres.
Explore Portaferry Lake across LakeQuality
Species activity outlook by water temperature and season
Top lakes and where to stay in the Adirondacks area
Where to stay at New York's top lakes, each with its readings
New York's cleanest lakes, ranked on agency measurements
More lakes in New York
Other Lakes in New York
Where this data comes from
Measurements for Portaferry Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.