Wilts & Dorset buses, now called Morebus, has agreed to reinstate the coastal routes X1 and X2 on Sundays from the end of May.
Last month the Sunday bus services between Highcliffe and Lymington via Barton-on-Sea and Milford-on-Sea were axed.
However, the future of the year round weekend service is still in doubt since the buses are having to be operated on a commercial basis following cuts in Hampshire County Council grants.
There will  be pressure to continue the Sunday service in the autumn.
