You can find out more¹ about Tides/bores at the Proudman Lab site, including when/where to see the Severn Bore at different places.

You can also find out more about the Severn Bore and when/where to see it at:

• Russell Higgins' site.
• The site of the Tidal Bore Rresearch Society.
• The bore website of the the Herefordshire & Gloucestershire Canal Trust.
• The Environment Agency site (with viewing details for the Trent Aegir as well).