Seasons and sky
Tidal Bore
Direct answer
Tidal Bore: A Tidal Bore is a steep tide-driven wave or surge that travels upstream in a shallow narrowing river or estuary.
A Tidal Bore is an incoming tidal wave advancing upriver.
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At a glance
- Found in
- Seasons & Earth Almanac
- Related
- Equinoctial Tide, Slack Water, Astronomical Season, Equinox
A Tidal Bore is an incoming tidal wave advancing upriver.
A Sun-Earth orientation for seasonal, atmospheric, tidal, and terrestrial terms.
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The story behind Tidal Bore
Communities along bore rivers developed local names and practical knowledge long before hydraulic theory explained the wave.
Why Tidal Bore matters
Tidal Bore can rapidly change water level and current, creating both a notable natural spectacle and serious navigation hazard.
Tidal Bore in practice: an example
A large incoming tide can form a breaking front where a funnel-shaped estuary becomes shallow and narrow.
Where readings of Tidal Bore go wrong
Observe only from approved safe locations; bores can generate powerful currents, debris, rapid inundation, and unstable banks.
Sources and editorial method
Research references used for this entry include:
- NOAA Tides and Currents Glossary - Operational definitions for tides, tidal currents, ranges, datums, bores, and amphidromic systems.
- Source
- The Great Almanac Dictionary
- Category
- Seasons & Earth Almanac
- Last updated
- 2026-09-26
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Common questions
What is a Tidal Bore?
A Tidal Bore is a steep tide-driven wave or surge that travels upstream in a shallow narrowing river or estuary.
What do people get wrong about a Tidal Bore?
Observe only from approved safe locations; bores can generate powerful currents, debris, rapid inundation, and unstable banks.
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