A free Town-run swimming beach on Knops Pond, donated for conservation in 1967, with a lifeguarded swim area in summer, grills at the North Point, and a kayak rack for residents.
What to expect
Swimming
Water not monitored by DPH
Season
Open year-round for passive use; lifeguarded/monitored swim season and water testing run Friday of Memorial Day weekend through the end of Labor Day weekend
Lifeguard
Lifeguard hours posted seasonally on notice boards and the town website; when off-duty, swim is at your own risk
Dogs
Must be leashed and picked up after; dogs may only enter the water outside the marked swim area and only up to their ankles
Fishing
Allowed year-round, permitted at the north and south points and on the docks away from the swim area, not from the swim area or beach itself
Kayak/Canoe
Allowed ice-free months
Ice-Skating
Allowed winter, per Town recreation listing
Managed by
Sargisson Beach Committee and Groton Conservation Commission
978-448-1106 · WebsiteGetting in
Access points along this beach
Main entrance / parking lot off Whiley Road
North Point
grilling/fishing point
What's here
Facilities
Picnic area
Charcoal grills at the North Point
Dock
L-shaped dock for motorized boats, away from the swim area
Common questions
Is Sargisson Beach in Groton open today?
open to the public; water quality here is not monitored by MA DPH (updated 2026-09-13). MA DPH is the authority. Check the status the morning you go.
Is there a lifeguard at Sargisson Beach?
Only during posted seasonal hours (roughly Memorial Day to Labor Day, weather dependent); outside those hours, swimming is at your own risk.
Is Sargisson Beach free to use?
Yes, it is free and open to the public with no residency requirement.
Yes, on a leash, but dogs may only enter the water outside the swim area and only up to their ankles.
Where's the nearest public boat launch?
The state-owned Lost Lake/Knops Pond boat launch is about one mile further along Whiley Road.
What rules should I know at Sargisson Beach?
No lifeguard on duty outside posted seasonal hours; swim at your own risk. No diving or jumping from the docks. No alcoholic beverages. No glass containers. No smoking in the waterfront vicinity. No camping. No motorized vehicles (ATVs, dirt bikes, snowmobiles). Dogs in water restricted to outside…
Can you swim at Sargisson Beach?
Sargisson Beach is town-owned and its water is not monitored by MA DPH, so there is no official swim status. Check conditions posted at the beach.