Spend a summers day on the wonderful derwent river upstream of new norfolk the derwent is a beautiful river with long peaceful reaches and gentle grade 1 to 3 rapids the derwent valley regularly records temperatures of over 30 degrees celcius in the summer months and a summer day floating down the warm river amidst the tranquil rural scenery is the very best way to experience the derwent valley possibly catch sight of the resident white bellied sea eagle or a shy platypus