We are staying at the Marriott Hotel and Marina in downtown San Diego April 12-17 . I have read about the awesome pool at this hotel. Is it heated? And if it is, will we freeze sitting out by the pool during the day? I know it will be too cold to go in the ocean, but what about the pool? I looked at weather dot com and got the average highs for April (69 the average high) so I am doubtful. Anyone who has visited during this time or lives in SD, I would really appreciate the advice. TIA!