Tidal Ranges

The table below shows you the difference between high and low water in metres at different times of year in various places around the British Isles.

 

Location Spring Average Neap
Plymouth 4.7 3.5 2.2
Portland 1.9 1.3 0.7
Southampton 4.0 3.0 1.9
Dover 5.9 4.6 3.3
London Bridge 6.6 5.6 4.6
Harwich 3.6 3.0 2.3
Lowestoft 1.9 1.5 1.1
Immingham 6.4 4.8 3.2
Middlesbrough 4.6 3.5 2.3
North Shields 4.3 3.2 2.1
Aberdeen 3.7 2.7 1.8
Wick 2.8 2.1 1.8
Lerwick 1.7 1.2 0.5
Oban 3.3 2.2 1.1
Greenock 3.0 2.4 1.9
Liverpool 8.4 6.4 4.5
Holyhead 5.0 3.8 2.5
Milford Haven 6.3 4.5 2.7
Swansea 8.4 6.4 4.5
Avonmouth 12.3 9.4 6.5
Dublin 3.4 2.6 1.9
Belfast 3.1 2.5 1.9
Londonderry 2.2 1.5 0.9
Boulgne 7.8 6.1 4.4
Le Havre 6.7 5.2 3.6
Cherbourg 5.4 4.0 2.5
St Helier 9.8 5.9 4.0
St Malo 10.7 7.8 4.8
Brest 6.1 4.5 2.9