Kaiwi Channel
The Kaiwi Channel, which is also known as the Molokai Channel, lies between Molokai and Oahu. Its maximum depth is 2,202 feet (671 m) and it spans 25.8 miles. It has a reputation for being one of the toughest ocean channels in the world because of the usually strong winds, strong currents and large swells. It is also known for being very unpredictable. One moment it may be calm as calm as a lake and then suddenly it turns into a raging roller coaster ride.
http://www.to-hawaii.com/oceanchannels.php
SST (Sea Surface Temperature) at the crash site is running about 77-77.1 degrees F. This is cool enough to induce hypothermia after prolonged immersion combined with chilling wind speeds of 14-17mph gusting to 27-30mph.
Hawaii SST Chart
http://www.fishtrack.com/fishing-charts/hawaii_58643