what is the coldest that water can get (does it get colder after it freezes?)?

Answer 1

The coldest that water (or anything) can get is 0°K

Water is said to freeze at 0°C but this is rarely the case since it depends on so many things. Pressure, kinetics, if the water has anything dissolved in it...

Water gets colder until it freezes and then the freezing process actually raises the temperature, then can continue getting colder and colder.

Water has the capability of becoming supercooled. If the temperature is lowered very slowly, it will not freeze at 0°C but will remain a liquid until an ice crystal is introduced to it, then will instantly become a solid mass. This is actually a great way to see that freezing water raises the temperature, the solidifying of supercooled water can have a dramatic rise in temperature.

Another interesting topic is the Mpemba Effect (not a type-o). It is the observation that hot water freezes faster than cold water.

Answer 2

Water freezes at 0 Celsius or 32 Farenheit. However, it can certainly get colder than that. Given enough time, it will get as cold as its surroundings get.