River Severn (tidal section)
The River Severn (tidal section) is a seaway and is part of the River Severn. It runs for 22 miles and 1 furlong from Portishead Harbour Entrance (which is a dead end) to Sharpness Junction (where it joins the River Severn (old river navigation) and the Gloucester and Sharpness Canal).
The maximum dimensions for a boat to be able to travel on the waterway are 89 feet long and 18 feet and 11 inches wide. The maximum headroom is not known. The maximum draught is not known.
It has junctions with the River Avon - Bristol at Avonmouth; with the Lydney and Pidcocks Canal at Severn - Lydney and Pidcocks Canal Junction and with the River Wye at Beachley Point.
![]() |
Portishead Harbour Entrance A useful place to wait for the tide |
||
![]() |
Avonmouth Junction of River Severn and River Avon (Bristol) |
1 mile and 2½ furlongs | 0 locks |
![]() |
Second Severn Crossing M4 Motorway |
6 miles and 4½ furlongs | 0 locks |
![]() |
Beachley Point Junction of the River Severn and the River Wye |
9 miles and 6½ furlongs | 0 locks |
![]() |
Severn Bridge | 10 miles and 7 furlongs | 0 locks |
![]() |
Oldbury on Severn Nuclear power station |
14 miles and 2¾ furlongs | 0 locks |
![]() |
Severn - Lydney and Pidcocks Canal Junction Junction of the River Severn and the Lydney and Pidcocks Canal |
21 miles and 3¼ furlongs | 0 locks |
![]() |
Sharpness Junction Junction of Gloucester and Sharpness Ship Canal with the River Severn |
22 miles and 1 furlong | 0 locks |

