Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Friday | High | 00:02 | 4.26m | Friday | Low | 07:07 | 1.03m | Friday | High | 12:34 | 3.77m |
| Friday | Low | 19:18 | 1.40m | Saturday | High | 00:45 | 4.08m | Saturday | Low | 07:50 | 1.24m |
| Saturday | High | 13:18 | 3.59m | Saturday | Low | 20:03 | 1.62m | Sunday | High | 01:29 | 3.88m |
| Sunday | Low | 08:38 | 1.44m | Sunday | High | 14:09 | 3.43m | Sunday | Low | 20:55 | 1.83m |
| Monday | High | 02:21 | 3.68m | Monday | Low | 09:32 | 1.63m | Monday | High | 15:08 | 3.32m |
| Monday | Low | 21:55 | 1.99m | Tuesday | High | 03:24 | 3.54m | Tuesday | Low | 10:33 | 1.74m |
| Tuesday | High | 16:17 | 3.30m | Tuesday | Low | 23:04 | 2.03m | Wednesday | High | 04:33 | 3.47m |
| Wednesday | Low | 11:35 | 1.76m | Wednesday | High | 17:23 | 3.38m | Thursday | Low | 00:07 | 1.94m |
| Thursday | High | 05:38 | 3.52m | Thursday | Low | 12:32 | 1.68m | Thursday | High | 18:20 | 3.56m |
