Often, in these humid conditions it's difficult for the forecasters, so they normally end up saying "misty around some coasts in the far SW."
But with a bit of common sense it's easy to pick the spots. Today (and it was very similar yesterday sea fog wise, there was just rather more in other cloud types yesterday.).
1:15
3:30
11am would have shown the same blue hole to the west of the Lizard and along the north coast. The streaks of cloud off the north coast at3:30 weren't sea mist, but bits of medium level cloud.
I've just got back from Perranuthnoe, just the far side of Marazion, where it felt hot in the humid, still conditions. It was probably around 23C in truth, just felt warmer. Currently (16:15) 24C at St. Mawgan, Newquay. The sea was virtually tepid over the beach. Warm nights and little evaporative cooling.
Much less swell today.
Graham
Penzance