Visiting HB, what to do?

We’re visiting HB for a long weekend from Phx to beat the heat. It’ll be myself, husband (both 30) and our 3 year old. Looking for recs on the best coffee shops, somewhere with great espresso and iced lattes. Restaurants we need to try, we love everything from fast casual, sit down, hole in the wall, upscale. Think we want to do a whale watching boat tour, our 3 year old loves marine life lol. Where are the best places to go for that? And any other activities, areas, fun things, live music, quirky local things etc. My husband is a San Diego native, literally born & raised 3rd generation San Diegan, but somehow doesn’t know what there is to do here?? Lol. So thanks in advance for your help!