Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Friday | High | 04:32 | 3.33m | Friday | Low | 11:08 | 2.19m | Friday | High | 16:44 | 3.71m |
| Friday | Low | 23:45 | 1.65m | Saturday | High | 05:38 | 3.63m | Saturday | Low | 12:10 | 1.85m |
| Saturday | High | 17:42 | 4.02m | Sunday | Low | 00:39 | 1.27m | Sunday | High | 06:25 | 3.96m |
| Sunday | Low | 12:59 | 1.45m | Sunday | High | 18:29 | 4.36m | Monday | Low | 01:24 | 0.89m |
| Monday | High | 07:05 | 4.29m | Monday | Low | 13:42 | 1.06m | Monday | High | 19:12 | 4.68m |
| Tuesday | Low | 02:05 | 0.58m | Tuesday | High | 07:42 | 4.56m | Tuesday | Low | 14:22 | 0.73m |
| Tuesday | High | 19:53 | 4.94m | Wednesday | Low | 02:44 | 0.37m | Wednesday | High | 08:21 | 4.78m |
| Wednesday | Low | 15:04 | 0.49m | Wednesday | High | 20:35 | 5.09m | Thursday | Low | 03:25 | 0.30m |
| Thursday | High | 09:00 | 4.90m | Thursday | Low | 15:47 | 0.37m | Thursday | High | 21:19 | 5.09m |
