I’ve always wondered how come the water in a swimming pool exposed to the scorching midday summer sun feels cooler when you dive, say around 2-3 pm, and warm as tea around 7 pm when the sun has almost gone.
In: Physics
My guess is that since gases change temperature faster than liquids, the water heats up slower than the air above it during the beginning of the day, making the water cooler relative to the air, and then retains that heat for longer than the air above it, making it warmer relative to the air during the early evening.
This is just using my own knowledge of science. Maybe someone else can add more info.
Edit: I believe you could look more into thermodynamics to get more info beyond ELI5.
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