The 2017–18 Hawaii Rainbow Warriors basketball team represented the University of Hawaiʻi at Mānoa during the 2017–18 NCAA Division I men's basketball season.

The Rainbow Warriors, led by third-year head coach Eran Ganot, played their home games at the Stan Sheriff Center in Honolulu, Hawaii, as members of the Big West Conference.

They lost in the quarterfinals of the Big West tournament to UC Irvine.

They were invited to play in the CollegeInsider.com Postseason Tournament, but they declined the invitation, citing financial concerns.

5 seed in the Big West tournament, they were defeated by Long Beach State in the quarterfinals.