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 | 05:46 | 0.87m | Thursday | High | 11:10 | 4.46m | Thursday | Low | 18:06 | 0.85m |
| Thursday | High | 23:28 | 4.12m | Friday | Low | 06:19 | 1.02m | Friday | High | 11:44 | 4.31m |
| Friday | Low | 18:39 | 1.02m | Saturday | High | 00:02 | 3.98m | Saturday | Low | 06:54 | 1.22m |
| Saturday | High | 12:20 | 4.12m | Saturday | Low | 19:15 | 1.24m | Sunday | High | 00:38 | 3.80m |
| Sunday | Low | 07:33 | 1.46m | Sunday | High | 12:59 | 3.88m | Sunday | Low | 19:56 | 1.50m |
| Monday | High | 01:22 | 3.59m | Monday | Low | 08:21 | 1.72m | Monday | High | 13:49 | 3.62m |
| Monday | Low | 20:50 | 1.77m | Tuesday | High | 02:19 | 3.38m | Tuesday | Low | 09:26 | 1.94m |
| Tuesday | High | 14:58 | 3.38m | Tuesday | Low | 22:02 | 1.97m | Wednesday | High | 03:46 | 3.25m |
| Wednesday | Low | 10:52 | 2.01m | Wednesday | High | 16:35 | 3.31m | Wednesday | Low | 23:28 | 1.97m |
