If “Under the Sea’’ from “The Little Mermaid’’ reminds you of our wet weather, just wait for other tunes at tomorrow’s Massachusetts Symphony Orchestra’s “Salute to Disney,’’ one of the free summer concerts. Bring along a picnic and relax while the orchestra, vocal ensemble, and soloists Scott Wilson and Karen Hastie-Wilson work that Disney magic with selections from “Hercules,’’ “Beauty and the Beast,’’ “Aladdin,’’ and more. July 11 at 7 p.m. (rain date July 12). Free. Institute Park, corner of Park and Salisbury streets, Worcester. 508-754-1234. www.masymphony.org