July 2, 1749 Tsunami: Pembrokeshire, Wales, United Kingdom

1749 July 02. The Scots Magazine of 9th July 1749 reports an agitation of the sea at Dale in Milford Haven, Pembrokeshire where several waves were observed disrupting boats at their moorings: “A letter from Milford Haven bears that on 2nd of July, about eleven o’clock, being near the time of low water, the sea exceedingly smooth, and the weather serene and fair, the inhabitants of Dale, in the said Haven, were alarmed by a sudden hideous rumbling of the water, and to the great amazement of a multitude of spectators, the tide was observed to run up, in the space of one minute, to high water mark, and with the same rapidity to retreat again. This phenomenon was repeated seven times in about three quarters of an hour. The violence of the torrent was so prodigious, that boats were forced from their moorings, and turned over and over. Many people were in danger of being swallowed up, but providentially no lives were lost.”

There are no other observations and no known sources for this to be a tsunami event. It is considered a non-tsunami event.

(reference #14326)

Reference #14362 lists this event on 23 July 1749. Also, lists it as a confirmed tsunami.