Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Thursday | Low | 04:49 | 0.59m | Thursday | High | 10:17 | 4.42m | Thursday | Low | 17:00 | 0.77m |
| Thursday | High | 22:27 | 4.63m | Friday | Low | 05:21 | 0.75m | Friday | High | 10:46 | 4.32m |
| Friday | Low | 17:34 | 0.94m | Friday | High | 22:59 | 4.45m | Saturday | Low | 05:54 | 0.97m |
| Saturday | High | 11:18 | 4.18m | Saturday | Low | 18:09 | 1.17m | Saturday | High | 23:34 | 4.22m |
| Sunday | Low | 06:28 | 1.24m | Sunday | High | 11:51 | 4.00m | Sunday | Low | 18:47 | 1.45m |
| Monday | High | 00:10 | 3.95m | Monday | Low | 07:05 | 1.55m | Monday | High | 12:29 | 3.79m |
| Monday | Low | 19:31 | 1.76m | Tuesday | High | 00:54 | 3.65m | Tuesday | Low | 07:48 | 1.90m |
| Tuesday | High | 13:17 | 3.55m | Tuesday | Low | 20:26 | 2.07m | Wednesday | High | 01:51 | 3.34m |
| Wednesday | Low | 08:47 | 2.23m | Wednesday | High | 14:25 | 3.33m | Wednesday | Low | 21:44 | 2.26m |
