why during night swimming, it is colder when you are not soaked in the pool?

Answer 1

The temperature of the outside air is lower than that of the pool water.

Answer 2

There are many reasons for being colder out of the pool at night. While in the pool the blood capillaries nearest the skin adjust to conserve heat and the water ceases to feel cold (unless it is in fact frigid). Whatever the (normal) pool temperature, when you get out water evaporation will make you feel cooler still, especially if there is any breeze. Wet one wrist and blow on both. The wet wrist will feel cooler due to the "wet bulb" effect. The drier the air, the greater the effect. Walking or running around will create your own breeze to increase the wet bulb effect.

Out of the pool during the day, there is still a wet bulb effect but you may also receive warm radiant heat from the sun (and surroundings!) and any breeze is more apt to be warmer than the pool water.

Answer 3

in no windy condition one should relaise that the thermal behaviour of water is different than the air. it gets all day to warm uop the pool
but when the temperatures drops during the night it is harder and it needs a lot of time to cool the pool down . this is normaly what happens to the sea where it avarage temperature at normal conditions is form 15-19 degress celsius with not a big fluctuation.

now take into consideration that your body senses temperature difference and not absolute temperature.
meaning that when the air is really hot and war during the day the water seems cooler since your reference i way way high. on hte other hand the temeprautre of the water is slightly increased during the night but the air outside is coller. so the reference temperature is lower now.
therefore it "feels" better inside the water and i gives a milder sensation thatn the one in the night.
imagine 20 degrees celsious of a water tank and outside temerature of 10 and 41 degrees.
the sensation the water would give although its absolute temperature would vbe the same is:

cooler at hot environments and warmer at cold enviroments...


so subjevtivity due to enviroment,

and different thermal conductivity coefficients of water and air is the answer.

Answer 4

Even the warm pool in summer drains your body of heat, but the slightest currents of air helps the droplets on your body dry so much faster than the pool of water, by pulling heat from your body

Answer 5

Because the Sun isn't out.

Answer 6

day time: warm air goes up, cool air comes down...
night time: the opposite of day time...
seriously

Answer 7

huh i notice that..but i have no idea why..maybe because when you get out and your body is wet, the wind makes you chillier.