Forget swimming at the beach, one lucky Whangamata local could be swimming in $4 million cash by simply checking their Big Wednesday ticket.

A lucky player from Whangamata won $4 million with Big Wednesday First Division in the 20 May draw, but a week on from the big win the prize remains unclaimed.

'We are still waiting for the lucky Big Wednesday winner to claim their prize,” says Lotto NZ's General Manager, Corporate Communications Emilia Mazur.

'Everyone who bought a ticket from Whanga Books should check their bags, pockets, glove boxes or any other place they may have stashed the ticket – this yellow piece of paper could change their life.”

Whoever the winner turns out to be, with $4 million in their bank account their next decision will be how to spend their windfall.

There are a range of investment opportunities in the Whangamata area for the discerning multi-millionaire, or they may prefer to kick back and enjoy the relaxing lifestyle the area is known for.

Whatever they choose to do, they need to collect their winnings first.

Anyone who bought their Big Wednesday ticket at Whanga Books in Whangamata should write their name on the back of the ticket and check it immediately in-store at any Lotto outlet or online at MyLotto.co.nz.

The winner can also contact Lotto New Zealand on 0800 695 6886 for more information about how to claim their prize.

The jackpot for tonight's Big Wednesday draw is $3.5 million and Saturday's Powerball jackpot is $14 million.