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 |