Did You Know?
- Double Tides in the Firth of Forth


Culross Rooftops and Firth of Forth Beyond

Due to a peculiarity of the topography of the estuary of the river Forth, the coast between Culross and Alloa has twice the normal number of tides each day.

When the tide has been coming in for about three hours it falls back for about two feet and then resumes its inward march. Likewise, on the ebb tide, it comes back in again for a couple of feet and then continues to recede.

In earlier times, it was said that this effect was due to St Mungo. He was sailing on the river Forth and his ship ran aground on an ebb tide. The saint used his miraculous powers and the water flowed back in to free the boat and allow him to continue.

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