To ask how is this possible! (Lighthearted)

[foxredlab2]

First world problem here.

We have a biggish Bestway type above ground pool in the garden, it's great but why oh why does it never ever warm up!

It's in direct sunlight, has a black thermal cover on it but it is absolutely freezing. It is currently 30°c in the garden the patio is scorching yet I go to sit in the pool and can't even sit down as it's so cold.

DS keeps getting in and out as he is shivering and it's a pain in the bum!

What's going on! Have I created my own micro climate?

Any tips for heating this thing up!

I had an in ground pool and the heater packed up one year but it was a steady 26-28 degrees in the water which was plenty warm. What is yours registering? It will be losing heat out the dudes at night?

Currently showing 20°

Well it’s due to the heat capacity of
water - it takes a lot of energy to heat it up. a few hours in the sun even on the hottest day of the year is t going to do much.
You need a heater.