3 days have exceeded 20°C here, but all three of them were only just higher
than 20°C with 20.1°C, 20.1°C & 20.2°C on the 12th, 13th & 14th.

The sea temperatures are around their highest at the moment so it only takes
a little bit of extra warming from the sun to break the 20°C mark.
________________
Nick.
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk