Police are concerned for the welfare of a north Queensland couple, missing since they embarked on a day trip that crossed flood affected areas.

A Queensland couple have not been seen since they embarked on a day trip that crossed flood-affected areas.

Kevin Bland, 51, and his partner, Denise Schumann, 42, were last seen at their home in Trinity Park, near Cairns, on Saturday.

Police say they left for a day trip to check camping spots, but had not returned.

They were driving a red Toyota FJ cruiser with Queensland registration 813 SST.

Police are concerned for their welfare as they have not been in contact with family or friends and were driving through flood-affected areas.