San Diego has a surprisingly large array of art activities and galleries. A great resource for finding art happenings in San Diego can be found here: http://sdartguide.com/
Here are a few of my favorites:
Carlsbad Art Splash-Typically happens in late September-food, art, chalk artists, music! Funds raised from this very family friendly event helps support music and art in schools. It did not happen in 2016, not sure why. https://www.facebook.com/CarlsbadArtSplash/
Art Walk NTC Great place to purchase art and be inspired by working artists, has a kid’s section: http://www.artwalksandiego.org/missionfederal/
Lity Italy Festa-Wonderful chalk art, music, food, activities,celebrating the Italian Culture. Always in October around Columbus Day: FESTA
San Diego Festival of the Arts (La Jolla Art Festival): Fine art, entertainment and food: http://www.sdfestivalofthearts.org/festival-info/
Friday Night Liberty Station: The first Friday of each month, studios, shops and museums are open from 5-8.
Art on 30th is new as of 2015 http://www.arton30th.com/ From their website: “Art on 30th was the vision of Kate Ashton in 2013 and officially opened its doors in January 2015. Ashton wanted a venue that honored the artists she mentored, a space that would be inspiring not only to work in, but for all who visit.”