Simple guides for using the tide predictions on Tide Checking. The site uses validated harmonic fits from Environment Agency tide gauges, not copied tide tables.
How to read tide times
What high water, low water and tidal range mean, and how to use the 14-day strip.
Tide heights and mAOD
Why the heights here are metres above Ordnance Datum and may not match printed tide tables.
Spring tides and weather surge
Why real sea levels move away from the astronomical prediction in wind and low pressure.
Why tide times differ
Why BBC, harbour tables and Tide Checking can show different times and heights.
Tide safety and cut-off risks
How to plan around beach cut-offs, coves, causeways, weather and the return walk.
Place characteristics
How open beaches, estuaries, harbours and ungauged coves behave differently.
These guides are for planning and understanding only. Tide Checking is not an official source and must not be used for navigation.