Where is Massabesic Lake?

Massabesic Lake is a lake in Rockingham County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.

How deep is Massabesic Lake?

Massabesic Lake has a maximum depth of 50 feet and an average depth of 17.4 feet. The lake covers 2561 acres.

Are there boat ramps on Massabesic Lake?

Massabesic Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Clair's Landing. Public access is listed as yes.

Can I fish at Massabesic Lake?

Massabesic Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.

Massabesic Lake

Rockingham County, New Hampshire2,561 acresView map Directions

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

Max depth

50 ft

Bathymetric survey

Area

2,561 acres

Surface area

Shoreline

25.9 mi

Measured length

Impaired · Biotoxins
50 ft max depth
Public access

See the measurements Directions Where to stay

Massabesic Lake in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 50 ft. Surface area: 2561 acres.

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Massabesic Lake is a 2,561-acre lake in Rockingham County, New Hampshire with a maximum depth of 50 feet (17-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Massabesic Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water50 ft surveyed max depth
Big water2,561 acres

Swimming conditions

No reading

Bacteria advisory

Nutrient and algae readings are not a swimming clearance. Massabesic Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.

Whether Massabesic Lake is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Massabesic Lake

These are the measurements NHDES publishes for Massabesic 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 Massabesic Lake

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

Lake Details

Max depth

50 ft

Average depth

17.4 ft

Surface area

2,561 acres

Shoreline

25.9 mi

Public access

Yes

Listed by NHDES

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

Recreation & Access

Boat Landings

Yes

Public Access

Clair's LandingPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Massabesic Lake

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Fishing Massabesic Lake

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

EPA Impairment Status

Massabesic Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

BiotoxinsMercuryNuisance exotic speciesOxygen depletion (low DO)pH / acidity

Designated uses not supporting: Aquatic life, Fish consumption, Recreation.

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

Source: EPA ATTAINS assessment unit NHLAK700060702-03 · Official waterbody report

Nearby Lakes in Rockingham County

Calef Pond1.6 miView →Little Massabesic Lake2.2 miView →Clark Pond2.9 miView →Tower Hill Pond-Deep SpotMesotrophic3.8 miView →Scobie Pond-Deep SpotMesotrophic4.9 miView →Harantis Lake-Deep SpotMesotrophic4.4 miView →

Frequently asked questions about Massabesic Lake

Where is Massabesic Lake?: Massabesic Lake is a lake in Rockingham County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Massabesic Lake?: Massabesic Lake in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 50 ft. Surface area: 2561 acres.
Is Massabesic Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Massabesic Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
How deep is Massabesic Lake?: Massabesic Lake has a maximum depth of 50 feet and an average depth of 17.4 feet. The lake covers 2561 acres.
Are there boat ramps on Massabesic Lake?: Massabesic Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Clair's Landing. Public access is listed as yes.
Can I fish at Massabesic Lake?: Massabesic Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.