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.
These guides are for planning and understanding only. Tide Checking is not an official source and must not be used for navigation.