The Thacher & Straitsmouth Islands boat launches will operate from June through August in 2025, with trips to Thacher Island on Wednesday, Saturday and limited Tuesday mornings, and trips to Straitsmouth Island on alternate Tuesday mornings of each month. Reservations are required for all passengers (including TSIA members using free tickets), and you can make the reservations for your tickets through Eventbrite beginning on May 10th.
Plan your adventure now!
Thacher Island Trips – all trips return 2 hours after their departure
- Tuesday trips begin on June 24th with morning departures
- Wednesday trips begin on June 4th with morning departures
- Saturday trips begin on June 7th with morning departures
Straitsmouth Island Trips – all trips return 2 hours after their departure
- Tuesday trips begin on June 3rd with three morning departures
Click on Visit Us for more information on ticket prices, departure location and parking.
Reservation support will be available beginning May 10, 2025 at (617) 599-2590 from 9am to 5pm.