St Michael's Mount causeway tide times: when to go
The cobbled causeway opens roughly 2 hours either side of low tide. At other times only the ferry runs.
Mon 2 November 2026
Go at low tide: 14:22 to 17:32
Low tide at 16:22 · Average tidal range
| Low tide | 03:31 | -1.3 m vs. mean sea level |
|---|---|---|
| High tide | 09:15 | +1.4 m vs. mean sea level |
| Low tide | 16:22 | -1.4 m vs. mean sea level |
| High tide | 21:59 | +1.1 m vs. mean sea level |
Sunrise 07:13 · Sunset 16:57 · Shaded bands: low-tide windows; grey: dark
Next 7 days
| Day | Low tide | High tide | Daylight window | Range |
|---|---|---|---|---|
| Mon 2 Nov | 03:31, 16:22 | 09:15, 21:59 | 14:22–17:32 | Mid |
| Tue 3 Nov | 04:51, 17:45 | 10:37, 23:26 | 15:45–17:30 | Mid |
| Wed 4 Nov | 06:14, 18:58 | 11:58 | 06:42–08:14 | Mid |
| Thu 5 Nov | 07:23, 19:57 | 00:40, 13:03 | 06:43–09:23 | Mid |
| Fri 6 Nov | 08:18, 20:46 | 01:37, 13:56 | 06:45–10:18 | Mid |
| Sat 7 Nov | 09:07, 21:30 | 02:23, 14:41 | 07:07–11:07 | Spring |
| Sun 8 Nov | 09:50, 22:10 | 03:04, 15:22 | 07:50–11:50 | Spring |
Biggest tides in the next 12 months
Spring tides expose the most sea floor at low water and bring the highest high water.
| Date | Range | Low tide | High tide |
|---|---|---|---|
| Sun 24 Jan 2027 | 5.0 m | 12:01 | 05:10, 17:32 |
| Mon 22 Feb 2027 | 5.3 m | 11:41, 23:56 | 04:54, 17:14 |
| Tue 23 Mar 2027 | 5.2 m | 11:17, 23:33 | 04:31, 16:50 |
| Wed 21 Apr 2027 | 4.9 m | 11:53 | 05:06, 17:25 |
| Wed 4 Aug 2027 | 5.1 m | 00:37, 12:52 | 06:10, 18:29 |
| Thu 2 Sep 2027 | 5.3 m | 00:17, 12:33 | 05:51, 18:09 |
| Fri 1 Oct 2027 | 5.3 m | 12:12 | 05:28, 17:46 |
| Fri 29 Oct 2027 | 4.9 m | 11:10, 23:31 | 04:24, 16:43 |
Tours
St Michael's Mount causeway tide times by month
Where these tide times come from
We fit 18 tidal constituents to modelled hourly sea level for the nearest open-sea grid point (50.13, -5.46), then predict any date with astronomical arguments and nodal corrections. In a held-out week our high and low water times differed from the model forecast by a median of 5 minutes.
Local harbours, river flow, wind and air pressure shift real tides by tens of minutes and heights by tens of centimetres. For causeways and sea-floor walks, always follow the official safe crossing times posted on site.
Times are local (Europe/London). Heights are relative to mean sea level, not chart datum. Source data: Open-Meteo Marine API.