Jesus Green Lido on Midsummer Common is an outdoor swimming pool that has been operating since 1923. At 91 metres long it is one of the longest outdoor pools in the UK, though it is unusually narrow — more of a lap pool outdoors than a classic lido. The pool is heated and open from late May through mid-September.
Swimming here on a warm Cambridge morning, with the willows on the Cam visible over the pool edge, is one of the genuinely pleasurable outdoor experiences the city offers. Admission is modest (around £4 for adults). The pool gets busy on warm summer weekends; arrive early or aim for a weekday.