I have not been in that part of the world in a long time, but the temps, even in July, can get into the high 50's at night. Bring a sweater especially since you are coming from Houston.
https://weather.com/weather/monthly/l/Santa+Barbara+CA?canonicalCityId=544856cc5db6fc320 238353421424031798795427cf76295e642a235c0511315
My Mom loved the Santa Barbara area. The HS I went to in Cali played Oxnard, Ojai, Carpinteria and Lompoc. This was in the 70's.
My parents would come to the games and stay in Santa Barbara for the night. He had a Lotus Europa at the time and loved the drive to Los Padres National Forest.
I'd take the bus back and my buds would drive me home until I got my license.
We didn't always go straight home.
Enjoy. A great part of the world.