Most people wore open-toe shoes in summer and sun and air could damage feet, Mr Graham said.
He said the key was to moderate your flip-flop use.
"Too many people think podiatrists see wearing jandals as a bad thing but I don't think it is. I think it's like fast food - it's okay in moderation."
Mr Graham said people should avoid flip-flops with a flat bottom.
"It's better to wear some with a slightly higher heel and they'll be easier to walk in."
Podiatrist Sophronia Kear, of Eastern Bay Podiatry, said people often neglect their feet in summer.
While most people tend to chuck on their flip-flops and forget about them, she said they need to pay slightly more attention.
Ms Kear said flip-flops encouraged issues like "clawing" because your foot was working hard to cling to the shoe.
"I'd advise trying to go for something with a strap."
Ms Kear said it was not enough for them to look good.
"Spend time walking around in them and make sure they fit properly."
She added that last season's jandals may not cut it.
Both podiatrists encouraged people with foot problems to invest in medical flip-flops like the Vasyli medical sandal.
Eastern Bay Podiatry clinic manager Matt Fraser said patients often refused to wear orthotics in summer because they wore jandals, but the Vasyli had a built-in orthotic footbed.
Top tips for looking after your feet
Invest in flip-flops with a supportive base - avoid those with a flat base.
Moisturise twice daily with a specific foot balm - body moisturiser won't cut it.
Use pumice on hardened heels to keep them smooth.
Treat flip-flops like fast food - only wear them in moderation.
Visit your podiatrist every eight weeks for a check-up.
