Liam Hemsworth Surfs After Sis-In-Law Says He Deserves Better Than Miley

Liam Hemsworth is boo-less in Malibu ... but he's still having a helluva time being single, ripping waves on his surfboard with older brother Luke.

Liam and Luke took full advantage of a nice swell Thursday in the 'Bu, paddling out to catch some waves and get away from all the drama back on dry land.

The youngest Hemsworth bro looked happy and at ease in the water, hanging ten before showing off his toned bod as he got out of his wetsuit.

As you know ... Liam's single for the first time in over a decade after filing for divorce from Miley Cyrus. She's already moved on to Kaitlynn Carter and now Cody Simpson.

Aside from an outing with Australian actress Maddison Brown last month in NYC, Liam's pretty much been flying solo.

Liam's sister-in-law, Elsa Pataky, made headlines Thursday when she said Liam "deserves much better" than Miley. Chris Hemsworth's wife also said her brother-in-law is a little bit down and coping well with the split.

It's the right idea here for Liam ... surfing's good for the mind, body and soul.