The 19-year-old midfielder moves to Chi in search of regular first-team minutes having made just one appearance for the Rebels so far this term, coming on as a substitute in the Emirates FA Cup win over Havant & Waterlooville.
Chadwick made 18 first-team appearances across all competitions last term as well as having brief spells at Littlehampton Town and Whitehawk on dual-registration terms.
He will link up with the Chichester City squad for this weekend’s Isthmian Premier Division match at home against Folkestone Invicta. Everyone at the club would like to wish Finlay the best of luck for his time at Chichester.