The 2009–10 Hawaiʻi Rainbow Warriors basketball team represented the University of Hawaiʻi during the 2009–10 men's college basketball season.

The Warriors played their home games at the Stan Sheriff Center and competed in the Western Athletic Conference.

The Rainbow Warriors finished the season 10–20 and 3–13 in WAC play to finish ninth and failed to qualify for the 2010 WAC men's basketball tournament.

In the WAC preseason polls, released October 20 via media teleconference[1] Hawai'i was selected to finish 9th in the coaches and media polls.

Sr. Roderick Flemings was selected to the coaches All-WAC second team.