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 | High | 02:45 | 3.70m | Wednesday | Low | 09:34 | 1.62m | Wednesday | High | 15:08 | 3.92m |
| Wednesday | Low | 22:23 | 1.46m | Thursday | High | 04:01 | 3.64m | Thursday | Low | 10:50 | 1.69m |
| Thursday | High | 16:30 | 3.83m | Thursday | Low | 23:37 | 1.48m | Friday | High | 05:20 | 3.73m |
| Friday | Low | 12:05 | 1.58m | Friday | High | 17:50 | 3.90m | Saturday | Low | 00:47 | 1.36m |
| Saturday | High | 06:27 | 3.95m | Saturday | Low | 13:15 | 1.31m | Saturday | High | 18:58 | 4.09m |
| Sunday | Low | 01:48 | 1.15m | Sunday | High | 07:25 | 4.25m | Sunday | Low | 14:15 | 0.96m |
| Sunday | High | 19:56 | 4.32m | Monday | Low | 02:42 | 0.91m | Monday | High | 08:15 | 4.56m |
| Monday | Low | 15:09 | 0.62m | Monday | High | 20:45 | 4.51m | Tuesday | Low | 03:30 | 0.69m |
| Tuesday | High | 09:00 | 4.81m | Tuesday | Low | 15:56 | 0.37m | Tuesday | High | 21:31 | 4.62m |
