Joseph Sylvia State Beach - Sound is an ocean beach in Oak Bluffs, Massachusetts.
What to expect
Swimming
Allowed water tested by the state
Tides & weather
Tide and sun: NOAA astronomy · forecast: NWS, up to 7 days
Show the full year
Average water temperature at Joseph Sylvia State Beach - Sound 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 Joseph Sylvia State Beach - Sound in Oak Bluffs 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 Joseph Sylvia State Beach - Sound?
Water at Joseph Sylvia State Beach - Sound 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 Joseph Sylvia State Beach - Sound?
Yes. Joseph Sylvia State Beach - Sound has no swimming advisory in the latest MA DPH posting (updated 2026-09-13). Check again the morning you go.