Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Wednesday | Low | 02:41 | 1.35m | Wednesday | High | 08:19 | 4.18m | Wednesday | Low | 15:10 | 1.16m |
| Wednesday | High | 20:38 | 4.13m | Thursday | Low | 03:18 | 1.12m | Thursday | High | 08:53 | 4.40m |
| Thursday | Low | 15:47 | 0.90m | Thursday | High | 21:13 | 4.30m | Friday | Low | 03:54 | 0.91m |
| Friday | High | 09:28 | 4.59m | Friday | Low | 16:23 | 0.69m | Friday | High | 21:50 | 4.42m |
| Saturday | Low | 04:31 | 0.75m | Saturday | High | 10:04 | 4.72m | Saturday | Low | 17:03 | 0.55m |
| Saturday | High | 22:26 | 4.49m | Sunday | Low | 05:11 | 0.67m | Sunday | High | 10:42 | 4.78m |
| Sunday | Low | 17:43 | 0.50m | Sunday | High | 23:07 | 4.48m | Monday | Low | 05:52 | 0.67m |
| Monday | High | 11:23 | 4.77m | Monday | Low | 18:26 | 0.53m | Monday | High | 23:50 | 4.39m |
| Tuesday | Low | 06:36 | 0.77m | Tuesday | High | 12:07 | 4.67m | Tuesday | Low | 19:11 | 0.66m |
