Sea Temp in U.K. right now?

This sea temp map says that North Devon and South Wales are 8 deg C:
https://www.thebeachguide.co.uk/sea-temperature
Whereas http://www.surf-forecast.com has all the individual spots in that area at about 5-6C, some even down into the 4s!!
My question is: which is correct? This matters to me cause 8-9C is just about ok for me, but 4 or 5 is out of the question, and I live too far away to try it and see.
I realise that when the sun's out, the temp in shallow water can be higher than out at sea, but is there an opposite effect on cold days that I'm not aware of where ocean currents keep the open sea warmer than shallow water near a beach?
Thanks.
https://www.thebeachguide.co.uk/sea-temperature
Whereas http://www.surf-forecast.com has all the individual spots in that area at about 5-6C, some even down into the 4s!!
My question is: which is correct? This matters to me cause 8-9C is just about ok for me, but 4 or 5 is out of the question, and I live too far away to try it and see.
I realise that when the sun's out, the temp in shallow water can be higher than out at sea, but is there an opposite effect on cold days that I'm not aware of where ocean currents keep the open sea warmer than shallow water near a beach?
Thanks.