Find the best things to do in San Diego inside with these great indoor activities! While San Diego’s year-round warm and sunny weather beckons people outdoors, there’s a lot of fun going on at indoor playgrounds too! Balboa Park’s 17 museums entertain, educate and inspire residents and visitors to explore every day. For the more adventurous, indoor trampoline parks have taken off in San Diego and indoor rock climbing is still as popular as ever. For another change of pace, go bowling or have a blast at indoor arcade and entertainment centers. Cap off your day with a performance at one of the county’s many live theaters.