It's time to get your togs out - the annual midwinter swim is back.

The More FM Polar Plunge will be held at midday this Sunday at Castlecliff beach. Participants will take the plunge at the Duncan Pavilion end of the beach, with access from Rangiora St.

Participants are encouraged to dress up and there will be prizes for the best and wackiest costumes.

There will be more than $400 worth of prizes to give away, thanks to the generosity of local businesses.

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Entry to the event is free. Search for "More FM Polar Plunge 2016" on Facebook for updates on the event.