Well, you've got to blame someone for our English summer. There are a number of churches named after Swithun, the Anglo Saxon bishop of Winchester, one is in Cornwall in the village of Launcells.
In his Cornish Treasure, David Freeman, writes of this church that it:
"nestles here resting on the shoulder of Cornwall like an old but familiar friend, deep amid an ancient tree endowed valley where silent men walked and pilgrims once prayed. Beneath oak groves and elder, willow and ash, this has always been an enchanted and sacred place. Watered by a small stream they call the Neet, ever growing as it twists & tumbles down the valley towards Stratton & Bude to the ocean beyond. The ancient Launcells Church stands guard as she has done for eons, above the well of St. Swithin the Holy confessor, a sainted man who it is said wandered these lands devoutly serving God in the days when Kenulf was King."
A holy well still lies beneath the granite battlements of this Norman church. As legend has it,
"never to run dry and the healer of all ailments of the eye and of sight,"
This is useful if it didn't happen to rain on St Swithin's Day.