LEAVING TOWN
Most tourists have already left for seaside resorts further north or south towards Spain.
"It's annoying because we can't go to the beach just opposite where we were staying," said Pascal, 56, from France's Alsace region. He opted to leave a day early to go up the coast.
In the Rue Mazagran, where pedestrians should be ambling from shop to shop, there is an eerie calm.
"Usually, there are a couple of thousand people every hour. Today, there's nobody," Issop Farouk, 59, who runs a shoe and clothing store. "You can never recover your losses."
But not everyone is upset. David, a 37-year-old surfer from Paris, brushed aside the fact two of the main surfing beaches are closed.
"The surf is good elsewhere, so I'll just try something else."
And some residents see the upheaval of the G7 as a chance to see their town in a better light.
"It's a bit of a holiday for us. We thought we'd escape Biarritz during the three days, but actually it's quite cool having nobody here and to see Biarritz in a different light," said 39-year-old local Lucas Denjean, who works in a communications agency.