Does the color of the pool affect the water temperature of a swimming pool

[Did67]

The experiment which would answer your suggestion is a little more complex: in isolated but transparent boxes placed at the bottom of the water, you put two tiles, with, on their backs, a well adherent coil; you circulate water; you continuously measure the inlet / outlet temperature differences and the flow rate, for the two tiles). And there, you will have an estimate of the energy captured by one and the other, at that depth - it will depend on the depth - for that water - it will depend on the turbidity (the "cloudiness"). And provided that the temperature difference between the two tiles is not too marked for the losses to be comparable.

[chatelot16]

no need to put 2 different colored surfaces in the same pool: the water will standardize the temperature and there will be nothing measurable

black is a double-edged sword: it absorbs well when the sun falls on it ... it radiates well to lose heat at night

that's why when you want to capture heat with maximum efficiency you have to separate the functions: completely isolate the thing to be heated so as not to lose the heat ... use a solar collector with water circulation, which circulates only when there is sun, and which no longer circulates when it cools

[Adrien (ex-nico239)]

Ah it's durrrr to stick strictly to the wording ...

That said, the digressions are understandable ...

A priori everyone agrees that a swimming pool with a black coating will allow the water to heat in the sun more than a swimming pool with a light coating ...

I didn't ask for more ...

It is obvious that on another level, that of the maximum conservation of the acquired temperature (this is another statement different from the previous one but which can prove to be just as exciting) during the night, for example, the swimming pool will be covered as it should.

But to transform the example I gave earlier
If a black pool takes (at random) 4 degrees during the day
If a white pool takes (at random) 1 degree during the day

The two being covered at night ..... lose 1 degree ...

[Gaston]

Ah it's durrrr to stick strictly to the wording ...

That said, the digressions are understandable ...

A priori everyone agrees that a swimming pool with a black coating will allow the water to heat in the sun more than a swimming pool with a light coating ...

I didn't ask for more ...

Well yes, a little, because you asked "does the color of the pool influence the water temperature"without further clarification: we do not know if it is the temperature of the water during the day, at night, in the sun, in the shade, on the surface, at the bottom, the average temperature, maximum, minimum, ...

Hence as many answers as hypotheses

[Adrien (ex-nico239)]

Exact it was in broad daylight and in full sun ... which was understood

[chatelot16]

if the pool takes 4 ° every day and loses 1 ° every night after a month it will boil!

it is not necessary to characterize a solar heating by a difference of temperature but by an energy brought ... and it is the other characteristics of the thing to be heated which make the temperature

an ordinary swimming pool is a thing that has a lot of loss ... it takes the temperature that it wants to take ... bring more power is to fill a pierced basket

the question of heating a swimming pool arises in spring: it's cold and you have to raise the temperature to be good in summer ... no matter the losses ... as long as it's cold we don't use the pool, and when we use it it will be warm enough so that there is no waste