St Michael's Mount and Marazion Beach Tide Times
Mount's Bay beach and causeway planning using the validated Newlyn gauge.
Tide times from the Newlyn gauge
These are the validated Newlyn gauge times shown in UK local time. They are not adjusted with a guessed beach offset. Heights are metres above Ordnance Datum (mAOD), not chart datum.
Loading the latest validated prediction file…
Prediction file generated 07 Sep 2026. Weather and air pressure can move real sea level away from the prediction.
Source gauge
The source tide page is Newlyn. Heights are shown in mAOD, not chart datum, and the gauge page includes the live gauge check and the full 14-day tide curve.
Beach characteristic
The St Michael's Mount causeway and Marazion Beach are highly tide-sensitive. Use the Newlyn gauge page for the validated tide curve, then check local causeway opening guidance before walking across.
Places covered on this guide
Use a safety margin
For beach walks, coves, causeways and cliff-backed beaches, check the return route as well as the next low water. Weather, swell and air pressure can move the real sea level away from the astronomical prediction.