Where is Lake Montauk?

Lake Montauk is a lake in Suffolk County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.

Lake Montauk

Suffolk County, New York1,078 acresView map Directions

No nutrient or algae sampling on record from NY DEC for this lake.

Area

1,078 acres

Surface area

Shoreline

8.4 mi

Measured length

Impaired · Pathogens (E. coli, fecal)

See the measurements Directions Where to stay

Lake Montauk in Suffolk County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 1078 acres.

Loading map…

Lake Montauk is a 1,078-acre lake in Suffolk County, New York.

Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.

What Lake Montauk is good for

From access and monitoring records, not editorial picks.

Big water1,078 acres

Swimming conditions

No reading

Bacteria advisory

Nutrient and algae readings are not a swimming clearance. Lake Montauk is listed impaired under Clean Water Act §303(d) (IR 5) for pathogens (E. coli, fecal). Check local advisories before you swim.

Whether Lake Montauk 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.

Get alerts for Lake Montauk →

Water quality measurements for Lake Montauk

These are the measurements NY DEC publishes for Lake Montauk, 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 Lake Montauk

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

1,078 acres

Shoreline

8.4 mi

No bathymetric survey has been published for Lake Montauk, so its depth is not documented here.

Stays via Stay22

Stays near Lake Montauk

Compare lakeside cabins, hotels, and vacation rentals near Lake Montauk in Suffolk 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 Lake Montauk

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 Lake Montauk’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Lake Montauk

→ Lake Montauk fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Lake Montauk is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Pathogens (E. coli, fecal)

Designated uses not supporting: Fish consumption.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit NY1701-0031 · Official waterbody report

Nearby Lakes in Suffolk County

Big Reed Pond1.3 miView →Oyster Pond1.8 miView →Fort Pond2.3 miView →Fresh Pond6 miView →Great Pond8.8 miView →Tobaccolot Pond8.9 miView →

Frequently asked questions about Lake Montauk

Where is Lake Montauk?: Lake Montauk is a lake in Suffolk 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 Lake Montauk?: Lake Montauk in Suffolk County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 1078 acres.
Is Lake Montauk safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Montauk is listed impaired under Clean Water Act §303(d) (IR 5) for pathogens (E. coli, fecal). Check local advisories before you swim.