page_title: Tidal bore
section_title: United Kingdom
hierarchical_section_title: Tidal bore / Rivers and bays with tidal bores / Europe / United Kingdom
caption_attribution_description: English: Tidal river bore on the river ribble Lancashire shown along the section of river between the entrance to the River Douglas and Preston
context_page_description: A tidal bore, often simply given as bore in context, is a tidal phenomenon in which the leading edge of the incoming tide forms a wave of water that travels up a river or narrow bay against the direction of the river or bay's current.
context_section_description: River Dee, Wales and England
  River Mersey. The second highest tidal bore after the Severn bore, up to 1.7 meters (6 ft) high. The bore tends to form around the Manchester Ship Canal.
  The Severn bore on the River Severn, Wales and England, up to 2 meters (7 ft) high
  The Trent Aegir on the River Trent, England, up to 1.5 meters (5 ft) high. Also other tributaries of the Humber Estuary.
  River Parrett
  River Welland
  The Arnside Bore on the River Kent
  River Great Ouse
  River Ouse, Yorkshire. Like the Trent bore, this is also known as "the Aegir".
  River Eden
  River Esk
  River Nith
  River Lune, Lancashire
  River Ribble, Lancashire
  River Yealm, Devon
  River Leven, Cumbria
caption: Tidal bore on the River Ribble
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