Humphrey's Half Moon Inn is a large hotel (two stories, 182 rooms) on Shelter Island, built in 1960 with Polynesian touches in accordance with the Harbor Department's requirement that all structures on the artificial island be Polynesian in appearance.

It is an upscale hotel, sporting a dramatic A-frame porte cochere and many well-maintained and unusual tikis throughout the grounds. In the summertime, Humphrey's plays host to national music acts during their very popular Humphrey's Concerts by the Bay series.

Humphrey's is one of several great vintage tiki locations on Shelter Island in San Diego, the others being Bali Hai Restaurant and Trader Mort's Liquor.