Fire and ambulance crews were called to Julian's Bridge in Wimborne in Dorset at around 12.30 am following reports that a man had fallen into the river.
By the time they arrived the man had been helped to the river bank by a friend. Using a spinal board ambulance crews took the man to hospital.
More top news
Holly has the latest forecast for the east of the region.
The forecast for the west of the region from Holly.
Holly has the latest forecast for the west of the ITV Meridian region.