It didn't take long for Swiss tennis star Roger Federer to find a beach after arriving in Perth for the 2018 Hopman Cup.

After jetting in around midnight, Federer flew to Rottnest via helicopter on Thursday morning before heading to Parakeet Bay to soak up the sun and warm water.

Roger Federer at the beach at Parakeet Bay on Rottnest Island. Credit:Tazli Bowe.

The 2017 Australian Open champion was his usual charming self, having a hit with some local kids and signing umbrellas for fans, including one group helping themselves to a few cans of Emu Export.

Afterwards, Federer headed into the island to take a quokka selfie, something he said was on his bucket list for his next Rottnest visit.