If you look at Penzance, or Newquay forecast on the MetO site, then
click recent weather, the recent weather you get isn't for Penzance or
Newqay, it's for Camborne.

To use Camborne reports as a pretence for recent weather on both the
north & south coasts of Cornwall is ludicrous. At this time of year a
5C temperature difference between the coasts is commonplace (which way
around depends on the wind).

With the current north wind off a cold sea, Camborne is currently
around 9C. Penzance around 13C, Plymouth 14C, even the higher/more
exposed Cardinham/ Culdrose are 13C & 12C respectively.

Fortunately, you can get actual weather for both Penzance seafront and
St. Mawgan at www.xcweather.co.uk/

Of course, if you want real warmth - head to Copley!

Graham
Penzance