Police and emergency services will resume a search for a man who failed to return from a kayaking trip off Middle Beach, north of Adelaide, last night.

The alarm was raised just before 11pm on Tuesday evening, after relatives contacted police with concerns for the missing man, aged in his 70s.

Police immediately commenced a search of the area, coordinated by the Water Operations Unit, utilising Polair with infrared camera capabilities and resources from Volunteer Marine Rescue.

The man was not located overnight and the search will continue at first light this morning.

Anyone with information or who spots a kayak in the search area is urged to contact police immediately on 131 444.

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