Crews from Hereford and Worcester Fire and Rescue Service (HWFRS) were called out to the Old Bridge at Bridge Street in Hereford just before 2.20am to reports that a person had fallen down the embankment and into the water.
The boy was able to clamber onto a boat 100 metres from the bridge, where the team rescued him using a water sled.
He was then left in the care of the ambulance service, with police also at the scene.
A spokesperson for HWFRS said: “Hereford & Worcester Fire and Rescue Service was called out to a rescue from water in Hereford at 2.19am today (Friday).
“Two crews from Hereford Fire Station, including a water rescue team, attended the Wye Bridge at Bridge Street.
“A male teenager had fallen down the embankment into the river but had managed to clamber onto a boat 100 metres from the bridge.
“The crews rescued the male using a water sled and left him in the care of the ambulance service.
“The police were also in attendance and the HWFRS crews left the incident at 3.09am.”