A causeway linking Seconsett Island to the mainland between Waquoit Bay and Hamblin Pond, better known as a shellfishing and small-boat access point than a swimming beach. The Harbormaster and Natural Resources offices sit right at the landing.
What to expect
Swimming
Allowed water tested by the state
Entry fee
You don't need a parking sticker for this spot; Parking at Mashpee's conservation land trailheads, town landings, and boat ramps doesn't require a sticker or permit under the town's bylaws.
Dogs
Dogs are not allowed year-round on Mashpee's town-owned beaches. Posted signs at the site take precedence.
Fishing
Allowed year-round
Managed by
Mashpee Department of Natural Resources / Harbormaster 508-539-1410 ·
Tides & weather
Tide and sun: NOAA astronomy · forecast: NWS, up to 7 days
Show the full year
Average water temperature at Seconsett Island Causeway by month, in °F| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Water °F | 39° | 37° | 41° | 48° | 56° | 66° | 73° | 74° | 70° | 62° | 54° | 44° |
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Monthly averages from NOAA, Woods Hole (2022 to 2024). Today's reading is in the conditions above.
Common questions
Is Seconsett Island Causeway in Mashpee open today?
Open, no advisory on record in the latest MA DPH posting (updated 2026-09-13). MA DPH is the authority. Check the status the morning you go.
What's the water temperature at Seconsett Island Causeway?
Water at Seconsett Island Causeway averages about 37°F in February and 74°F in August, based on NOAA readings at Woods Hole from 2022 to 2024. For today's temperature, see the conditions above.
Can you swim at Seconsett Island Causeway?
Yes. Seconsett Island Causeway has no swimming advisory in the latest MA DPH posting (updated 2026-09-13). Check again the morning you go.
Are dogs allowed at Seconsett Island Causeway?
Dogs are not allowed year-round on Mashpee's town-owned beaches. Posted signs at the site take precedence.
Is there an entry fee at Seconsett Island Causeway?
You don't need a parking sticker for this spot; Parking at Mashpee's conservation land trailheads, town landings, and boat ramps doesn't require a sticker or permit under the town's bylaws.