Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Sunday | Low | 03:17 | 0.77m | Sunday | High | 08:45 | 4.33m | Sunday | Low | 15:22 | 0.91m |
| Sunday | High | 20:52 | 4.64m | Monday | Low | 03:46 | 0.60m | Monday | High | 09:12 | 4.48m |
| Monday | Low | 15:51 | 0.72m | Monday | High | 21:23 | 4.75m | Tuesday | Low | 04:16 | 0.51m |
| Tuesday | High | 09:43 | 4.57m | Tuesday | Low | 16:23 | 0.63m | Tuesday | High | 21:54 | 4.79m |
| Wednesday | Low | 04:48 | 0.51m | Wednesday | High | 10:15 | 4.59m | Wednesday | Low | 16:58 | 0.63m |
| Wednesday | High | 22:28 | 4.75m | Thursday | Low | 05:23 | 0.60m | Thursday | High | 10:49 | 4.54m |
| Thursday | Low | 17:36 | 0.74m | Thursday | High | 23:05 | 4.62m | Friday | Low | 06:02 | 0.79m |
| Friday | High | 11:28 | 4.40m | Friday | Low | 18:20 | 0.94m | Friday | High | 23:48 | 4.38m |
| Saturday | Low | 06:46 | 1.09m | Saturday | High | 12:14 | 4.18m | Saturday | Low | 19:09 | 1.23m |
