In an earlier thread I posted to a link showing a map with the actual SST (Sea Surface Temperatures) in the channel when this event occurred: 77F-78.1F
Hawaii SST Chart
http://www.fishtrack.com/fishing-charts/hawaii_58643
United States
Search and Rescue Task Force
Cold Water Survival
Expected Survival Time in Cold Water
Water Temperature 7080° F (2127° C)
Exhaustion or Unconsciousness in 312 hours
Expected Survival Time 3 hours indefinitely
http://www.ussartf.org/cold_water_survival.htm