San Diego [1] has more than its share of sunny days year-round, so get outside! With dozens of miles of beaches, zoos, parks, trails, and endless opportunities for recreation, even the most dedicated couch potatoes can find something great to do under the famed California sun.
The average water temperature of the Pacific Ocean in summer stands at 65–70°F—perfect for surfing [2], snorkeling, diving [3], kayaking [4], or just plain old swimming.
Links:
[1] http://www.moon.com/destinations/california/san-diego
[2] http://www.moon.com/destinations/california/san-diego/sports-and-recreation/surfing
[3] http://www.moon.com/destinations/california/san-diego/sports-and-recreation/snorkeling-and-scuba
[4] http://www.moon.com/destinations/california/san-diego/sports-and-recreation/boating/kayaking