Expected Survival Time in Cold Water Water TemperatureExhaustion or Unconsciousness inExpected Survival Time 70–80° F (21–27° C)3–12 hours3 hours – indefinitely 60–70° F (16–21° C)2–7 hours2–40 hours 50–60° F (10–16° C)1–2 hours1–6 hours 40–50° F (4–10° C)30–60 minutes1–3 hours 2 more rows