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 | High | 00:12 | 3.82m | Sunday | Low | 07:15 | 1.48m | Sunday | High | 12:40 | 3.61m |
| Sunday | Low | 19:30 | 1.70m | Monday | High | 00:57 | 3.59m | Monday | Low | 08:09 | 1.73m |
| Monday | High | 13:36 | 3.34m | Monday | Low | 20:26 | 1.99m | Tuesday | High | 02:00 | 3.37m |
| Tuesday | Low | 09:21 | 1.90m | Tuesday | High | 14:57 | 3.15m | Tuesday | Low | 21:46 | 2.16m |
| Wednesday | High | 03:29 | 3.26m | Wednesday | Low | 10:49 | 1.86m | Wednesday | High | 16:38 | 3.20m |
| Wednesday | Low | 23:16 | 2.07m | Thursday | High | 05:01 | 3.41m | Thursday | Low | 12:04 | 1.57m |
| Thursday | High | 17:51 | 3.48m | Friday | Low | 00:25 | 1.74m | Friday | High | 06:04 | 3.72m |
| Friday | Low | 12:59 | 1.16m | Friday | High | 18:42 | 3.84m | Saturday | Low | 01:18 | 1.31m |
| Saturday | High | 06:51 | 4.09m | Saturday | Low | 13:46 | 0.74m | Saturday | High | 19:24 | 4.18m |
