The fact that it is in such close contact to the earth, the surface of which is cold compared to the air.
Because the air is cooler then the water which makes it feel cool
Because the air around you is hotter then water in the pool.
It's all about how your body reacts to relative temperatures. The truth is that the pool temperature is not likely to be the culprit. It's more about how your body perceives the difference between the outside temperature vs the pool temperature. The transition from standing in the hot sun to getting into your pool makes the water feel colder than it might feel than if you are standing in cold rain before entering the pool.
To tell you the truth, if you think about, the clothes you wear are sticking to your skin making you feel hot. When you take your clothes off, it already makes you feel way cooler. Also, since the pool is usually cool/cold, that just makes you feel cooler on a hot summer's day.
Whether you were in a saltwater pool or a fresh water pool you will feel heavier when leaving the water because while in the water you Will be relatively lighter.
Yes, there are water resisitent Swimming Pool Summer Party Tableware Sets.
It depends on many factors. Some of them are:how deep the pool is;how cold the pool water is;how hot the hot water is;how cold the air is;how cold the surrounding ground is;how windy it is; andhow warm you want the pool water.
The hard part is keeping a swimming pool cool in Fl. My pool in Cutler Ridge (south of Miami) would feel like warm bath water during the summer. It was easily over 88F, but there wasn't anything to be done about it. :-/
Yes.
Pool plaster in generally not affected by cold water, cold water above freezing of course.
No, water should not be kept in your pool all winter. When it gets cold enough, the water will freeze. When water freezes, it expands. So when the water in your pool freezes and expands your pool will be ruined.
because your body hasn't adjust to the temp to the pool