Lifeguard
(1976)

Even though he's far too old to be a lifeguard, Rick (Sam Elliott) turns down the offer to become a Porsche salesman, and chooses to keep his happy, laid-back life as a beach bum.

He knows this decision will probably cost him the love of Cathy (Anne Archer), but he can't give up the carefree lifestyle he's gotten used to.

Thanks John L!