Tolsooth being the name of the pointed rocks in the foreground. It's quite unusual to have a heavy swell on a low tide. The waves are breaking on the ledges surrounding the rocks south of Annet thus giving this line of surf illuminated by the evening light.
Uploaded to Geograph by David Lally on 6 September 2013
Photo © David Lally, 6 September 2013. Licensed for reuse under this Creative Commons licence