I'm sure many people have noticed after getting out of a shower or out of a swimming pool that moving air makes them feel colder. It seems like one way to beat the summer heat is with water and also moving air. But, does having water on your body actually cool you off more with moving air, or is that simply what it feels like because water cools differently than air?
When your wet skin experiences air flow over it, water will evaporate. Evaporation causes cooling, as energy is transferred from the remaining water molecules to the ones that evaporate - energy in water molecules is being experienced as heat. Less energy -> less heat -> sensation of cooling.
This is why you feel cold, as opposed to when you stay submerged in the pool, or your skin is dry and it is just air movement - no evaporation is taking place.