A particular feature of recent months, even more so than normal.
Unbroken sunshine when I was out at Sennen (10:00-13:30)
http://www.easterling.freeserve.co.uk/190915.html but a considerable build up of cloud just inland. Nothing threatening, the Cu soon hit the stable layer and quickly formed a fairly extensive Sc sheet away from the immediate coast. Penzance, being in a deep Bay, has been under the cloud about 80% of the time since 11:00.
Minimum last night was 9.0C. Maximum in Penzance, under the cloud around 17C. Warmer on the sunnier coasts. Max so far 18.2C at Land's End, so probably around 19C down in Sennen where it was calm. Around 18.5C on St Mary's exposed airport, 19.8C at the more sheltered St. Martin's site. Scilly always does particularly well under still conditions - no sea breeze to cap the temperature & virtually no Cu development.
No surf, so I just made the most of a beer in the sun. I saw seals, but the basking shark turned out to be a snorkeller. If it was for some smartass with binoculars we'd have been happy sticking with basking shark.
Graham
Penzance