Night swimming in Snowdonia

Wild swimming in a lake, under the stars and dark skies of north Wales, is a bold and bracing escape from light pollution

Llyn Cwm Bychan, a lake high in Snowdonia national park, looks black and forbidding even on a sunny day, so it’s perhaps a good thing I can’t see it right now. It’s 10.30pm and only the contours of the land are visible, jagged and black, against the starry sky – and I am going to swim.

Wild Swim Snowdonia was founded earlier this year by Laura Sanderson and Meg Pugh, who run a year-round swim group and also guide visitors to the park’s most unspoiled spots. They have teamed up with Dani Robertson, Snowdonia’s Dark Sky officer, to host free, late-night swims under the stars. Family-friendly swims take place after dark on Harlech’s long sandy beach and, later in the evening, there are adult-only swims in the mountain lakes above it.

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