Torrential rain in South-east Queensland overnight has added two months water supply to the region's dams.

Seqwater says the combined capacity of Wivenhoe, Somerset and North Pine dams rose by 1.4 per cent this morning.

Spokesman Mike Foster says the dams received between 25 and 52 millimetres of rain overnight, the most since March.

Levels are expected to reach 45 per cent tonight and could go as high as 46 per cent by the end of the weekend.

Wivenhoe has reached more than 27 per cent capacity, Somerset nearly 92 per cent and North Pine Dam is more than 39 per cent.

The Gold Coast's Hinze Dam received 57 millimetres overnight, topping its levels to 95.31 per cent.

Lake Baroon on the Sunshine Coast is overflowing.

AAP