How long can someone survive trapped in ice?

In freezing water you would likely be unconscious within 15 minutes and dead within 45.

In water up to 50 degrees you would lose consciousness in 30-60 minutes and die within 1-3 hours.

Even 70-80 degree water can kill you if in it for several hours.

Note that this time is extremely different depending on the health conditions, sex, age, psychic conditions, training, etc.

Water temperature: 32 degrees or below

Time until exhaustion or unconsciousness: Less than 15 minutes

Expected time of survival in the water: Less than 15 to 45 minutes

Water temperature: 32.5 to 40 degrees (the degrees are Fahrenheit)

Time until exhaustion or unconsciousness: 15 to 30 minutes

Expected time of survival in the water: 30 to 90 minutes

Water temperature: 40 to 50 degrees

Time until exhaustion or unconsciousness: 30 to 60 minutes

Expected time of survival in the water: 1 to 3 hours

Water temperature: 50 to 60 degrees

Time until exhaustion or unconsciousness: 1 to 2 hours

Expected time of survival in the water: 1 to 6 hours

Water temperature: 60 to 70 degrees

Time until exhaustion or unconsciousness: 2 to 7 hours

Expected time of survival in the water: 2 to 40 hours

Water temperature: 70 to 80 degrees

Time until exhaustion or unconsciousness: 3 to 12 hours

Expected time of survival in the water: 3 hours to indefinite

People can survive indefinitely in water temperatures above 80 degrees.