After joining the Newcastle Jets in the 2006–07 season Griffiths quickly formed the basis of the team that underwent a strong resurgence under new coach Gary van Egmond. His memorable performances include scoring two goals in extra time against Perth Glory in round 20 to draw the game at 3–3. At the end of the regular season Griffiths had contributed a total of 6 goals for the Jets. The Jets would finish third in the regular season and be narrowly knocked out of the chance to play in the AFC Champions League and the 2007 Grand Final.