Just in case, you may want to bring an umbrella. Because the location is very close to the coast, temperatures drop at sunset, so you should bring a light jacket or sweater. Buildings are air-conditioned, so you may want to have a sweater with you during the sessions at the conference. Southern California is known for very casual attire. Formal dress is not required for any of the social events.
Appropriate dress is slacks, jeans, sweaters.
You are encouraged to bring comfortable walking shoes. Foreign visitors must possess a valid passport. Participants are advised to consult the U.S. Consular Offices or diplomatic missions in their countries with specific questions. You may want to investigate acquiring travel insurance for your time away from home. There is a university travel agency in the UCI Student Center that can assist with making and reconfirming travel reservations and tickets.