On 23 January 2009, he joined Brentford on a one-month loan deal, and made his debut the following day in a 2–0 defeat away at Macclesfield Town in a League Two fixture. He scored his first Brentford goal on his home debut in the 3–0 win at home to Aldershot Town. Rhodes scored his first hat-trick in 29 minutes of the first half in the 3–1 away win at Shrewsbury Town on 31 January, also making him the youngest Brentford player to score a hat-trick in the club's history, five days short of his 19th birthday. On 26 February, having scored six goals in seven matches, his loan was extended for "a further two months", with the addition of a 24-hour recall clause. On 17 March, Rhodes suffered a broken metatarsal in a match against Chesterfield, ending his season. Even though Rhodes was sidelined for nearly half of March, he was named as March's PFA League Two Fans' Player of the Month.