Some great photos of Perranporth beach at low and high tide by Michael Marten in the Guardian on Saturday.

• http://www.guardian.co.uk/artanddesign/gallery/2012/feb/24/tides-michael-marten-photography#/?picture=386293180&index=5
• http://www.guardian.co.uk/artanddesign/gallery/2012/feb/24/tides-michael-marten-photography#/?picture=386293182&index=6

Perranporth, Cornwall. 29 and 30 August 2007. Low water 12 noon, high water 8pm

Perranporth, Cornwall. 28 and 29 August 2007. High water 6pm, low water 11.20am