Minimum of 14.7C last night, warmest of the year so far.
Already 19.3C at 09:00 BST.

So warm pools of surface water forming now, even well out to sea.

E.g.

Sevenstones yesterday:-

14:00 - 60.6
15:00 - 61.0
16:00 - 61.3
17:00 - 61.2
18:00 - 60.1
19:00 - 61.2

(Not centigrade obviously - I can't be bothered to convert it,
anything 60f is warm)

Warmer in the shallow waters of Mount's Bay.

Graham
Penzance