The Sewerage of Sea Coast Towns by Adams, Henry C., 1873-1952

Date: Times of High Water. Difference in Jan 1840. Tide Gauge. Tide Table. Tide Table. H.M. H.M. 27th, p.m....... 0. 8 ....... 0. 7 ..... 1 min earlier. 28th, a.m....... 0.47 ....... 0.34 ..... 13 min earlier. 28th, p.m....... 11.41 ....... 1. 7 ..... 86 min later. 29th, a.m....... 1.29 ....... 1.47 ..... 18 min later. 29th, p.m....... 2.32 ....... 2.30 ..... 2 min earlier.

Although the times of the tides varied so considerably, their heights were exactly as predicted in the tide-table.

The records during a storm on October 29, 1838, gave an entirely different result, as the time was retarded only ten or twelve minutes, but the height was increased by 8 ft On another occasion the tide at Liverpool was increased 7 ft by a gale. The Bristol Channel holds the record for the greatest tide experienced around the shores of Great Britain, which occurred at Chepstow in 1883, and had a rise of 48 ft 6 in The configuration of the Bristol Channel is, of course, conducive to large tides, but abnormally high tides do not generally occur on our shores more frequently than perhaps once in ten years, the last one occurring in the early part of 1904, although there may foe many extra high ones during this period of ten years from on-shore gales. Where tides approach a place from different directions there may be an interval between the times of arrival, which results in there being two periods of high and low water, as at Southampton, where the tides approach from each side of the Isle of Wight.