Tidal Differences of High Water to Portsmouth
| Variation | to | Portsmouth | |||
| Select | the | Capital | Letter | ||
| A | B | C | D | E | F |
| G | H | I | J | K | L |
| M | N | O | P | Q | R |
| S | T | U | V | W | X |
| Y | Z |
| Location | Spring | Neap |
| Avonmouth | sub 4 hrs 8 mins | sub 5 hrs 25 mins |
| Beaulieu River | sub 40 mins | sub 10 mins |
| Bembridge | sub 20 mins | sub 20 mins |
| Birdham | add 15 mins | add 5 mins |
| Bognor Regis | - | sub 20 mins |
| Bosham | add 20 mins | add 5 mins |
| Brighton | sub 50 mins | sub 15 mins |
| Calshot | - | add 20 mins |
| Chichester Ent. | add 5 mins | sub 10 mins |
| Christchurch Ent. | sub 2 hrs 30 mins | add 20 mins |
| Cowes | sub 15 mins | add 15 mins |
| Dartmouth | sub 5 hrs 50 mins | sub 5 hrs 30 mins |
| Dell Quay | add 25 mins | add 10 mins |
| Dover | sub 30 mins | sub 15 mins |
| Eastbourne | sub 50 mins | sub 30 mins |
| Emsworth | add 10 mins | add 15 mins |
| Exmouth Dock | sub 4 hrs 20 mins | sub 4 hrs 40 mins |
| Falmouth | sub 6 hrs 17 mins | sub 6 hrs 25 mins |
| Freshwater | sub 2 hrs 10 mins | add 25 mins |
| Great Yarmouth | sub 3 hrs | sub 2 hrs 40 min |
| Greenwich | ||
| Hamble | sub 22 mins | add 22 mins |
| Hurst Point | sub 1 hr 15 mins | sub 5 mins |
| Itchenor | - | sub 20 mins |
| Jersey | ||
| Kew Bridge | ||
| Keyhaven | ||
| Lee-On-Solent | add 5 mins | sub 5 mins |
| Lepe | sub 1 hr | - |
| Littlehampton | add 5 mins | sub 15 mins |
| Liverpool | ||
| London Bridge | add 2 hrs 30 mins | add 2 hrs 15 mins |
| Lulworth Cove | ||
| Lymington | sub 1 hr 10 mins | add 5 mins |
| Milford Haven | sub 4 hrs | sub 4 hrs |
| Nab Tower | ||
| Newhaven | ||
| Newtown River | sub 1 hr 8 mins | add 58 mins |
| Northney | add 10 mins | sub 5 mins |
| Oban | ||
| Padstow | ||
| Plymouth | sub 5 hrs 25 mins | sub 5 hrs 25 mins |
| Poole Entrance | sub 2 hrs 40 mins | add1 hr 5 mins |
| Portland | ||
| Putney Bridge | ||
| Queenborough, Sheppey | ||
| Ryde | sub 10 mins | add 10 mins |
| Salcombe | sub 5 hrs 15 mins | sub 5 hrs 20 mins |
| Sandown | - | add 5 mins |
| Selsey Bill | sub 5 mins | sub 5 mins |
| Shoreham | sub 45 mins | sub 10 mins |
| Southampton | sub 40 mins | sub 9 mins |
| Swanage | sub 2 hrs 50 mins | add 1 hr 5 mins |
| Totland Bay | sub 1 hr 30 mins | sub 45 mins |
| Ullapool | ||
| Ventnor | sub 25 mins | sub 30 mins |
| Warsash | sub 20 mins | add 25 mins |
| Weymouth | ||
| Wootton Creek | ||
| Yarmouth | sub 1 hr 5 mins | add 5 mins |
| Zeebrugge | ||
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