Information on the tide times and tide tables for Bristol Harbour.
Tide table for 2021
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Tide time differences on high water
Bristol (Cumberland Basin) and Avonmouth
High Water Bristol and High Water Avonmouth
| Place | Difference / hours:minutes |
| Avonmouth | 00.00 |
| Barry | -00.22 |
| Beachley | +00.12 |
| Berkeley | +00.37 |
| Bridgwater | -00.22 |
| Bristol | +00.10 |
| Cardiff | -00.15 |
| Chepstow | +00.20 |
| Clevedon | -00.15 |
| Flatholm | -00.15 |
| Lynmouth | -01.05 |
| Minehead | -00.40 |
| Newport | -00.15 |
| Porlock | -00.50 |
| Portishead | -00.01 |
| Sea Mills | +00.05 |
| Sharpness Docks | +00.42 |
| Steepholm | -00.20 |
| Watchet | -00.42 |
| Weston-Super-Mare | -00.25 |
Simplified tide reduction table
Approximate depths of water on Cumberland Basin outer cill in metres.
| Flood: Hours before high water | Ebb: Hours after high water | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Predicted H.W. Kingsroad Chart Datum | 3.5 | 3 | 2.5 | 2 | 1.5 | 1 | 0.5 | Predicted H.W. Cumberland Basin cill | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 |
| 14.2 | 1.5 | 3.3 | 5.0 | 6.8 | 8.6 | 10.0 | 10.8 | 11.1 | 10.7 | 9.6 | 8.2 | 6.7 | 5.6 | 4.4 | 3.3 |
| 13.7 | 1.7 | 3.3 | 5.0 | 6.7 | 8.3 | 9.6 | 10.3 | 10.6 | 10.2 | 9.1 | 7.9 | 6.5 | 5.3 | 4.2 | 3.1 |
| 13.2 | 2.0 | 3.4 | 5.0 | 6.5 | 8.0 | 9.2 | 9.9 | 10.1 | 9.7 | 8.7 | 7.5 | 6.3 | 5.1 | 4.0 | 3.0 |
| 12.7 | 2.3 | 3.5 | 5.0 | 6.4 | 7.7 | 8.7 | 9.4 | 9.6 | 9.3 | 8.4 | 7.3 | 6.1 | 4.9 | 3.9 | 2.9 |
| 12.2 | 2.6 | 3.7 | 5.0 | 6.2 | 7.4 | 8.3 | 8.9 | 9.1 | 8.8 | 8.1 | 7.0 | 6.0 | 4.9 | 3.9 | 3.0 |
| 11.7 | 2.9 | 3.9 | 5.0 | 6.1 | 7.1 | 7.9 | 6.4 | 8.6 | 8.3 | 7.7 | 6.7 | 5.7 | 4.8 | 3.8 | 3.0 |
| 11.2 | 3.1 | 4.0 | 5.0 | 5.9 | 6.8 | 7.5 | 7.9 | 8.1 | 7.8 | 7.2 | 6.4 | 5.5 | 4.6 | 3.8 | 3.0 |
| 10.7 | 3.3 | 4.1 | 4.9 | 5.8 | 6.5 | 7.1 | 7.5 | 7.6 | 7.4 | 6.9 | 6.1 | 5.3 | 4.5 | 3.7 | 3.0 |
| 10.2 | 3.4 | 4.1 | 4.8 | 5.5 | 6.2 | 6.7 | 7.0 | 7.1 | 6.9 | 6.5 | 5.8 | 5.1 | 4.4 | 3.7 | 3.0 |
| 9.7 | 3.4 | 4.1 | 4.7 | 4.3 | 5.9 | 6.3 | 6.5 | 6.6 | 6.5 | 6.1 | 5.6 | 4.9 | 4.3 | 3.7 | 3.1 |
| 9.2 | 3.4 | 4.0 | 4.5 | 5.0 | 5.5 | 5.8 | 6.0 | 6.1 | 6.0 | 5.7 | 5.3 | 4.8 | 4.2 | 3.6 | 3.1 |
For greater accuracy refer to Arrowsmith' Bristol Channel Tide Table.
Tidal predictions are computed by the Institute of Oceanographic Sciences, copyright reserved.