Three things you want to watch out for as mentioned heavy surf which is most obvious. Also heavy current, whatch the water for a while before you get in try to avoid areas that flow like river and will take you straight out in to open water. Check the weather before you go. Heavy winds especially santa ana's which come up quick and will blow you off shore can be very dangerous. Go with other people and always let someone know where your going and when you plan on coming back. Use good judgement and you'll be fine.

JerryG