Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Monday | Low | 06:01 | 1.08m | Monday | High | 11:24 | 3.91m | Monday | Low | 18:08 | 1.27m |
| Monday | High | 23:39 | 4.11m | Tuesday | Low | 06:44 | 1.16m | Tuesday | High | 12:10 | 3.79m |
| Tuesday | Low | 18:54 | 1.40m | Wednesday | High | 00:25 | 4.00m | Wednesday | Low | 07:34 | 1.23m |
| Wednesday | High | 13:01 | 3.68m | Wednesday | Low | 19:45 | 1.53m | Thursday | High | 01:18 | 3.90m |
| Thursday | Low | 08:29 | 1.29m | Thursday | High | 14:01 | 3.59m | Thursday | Low | 20:45 | 1.62m |
| Friday | High | 02:18 | 3.83m | Friday | Low | 09:33 | 1.29m | Friday | High | 15:09 | 3.58m |
| Friday | Low | 21:52 | 1.63m | Saturday | High | 03:27 | 3.84m | Saturday | Low | 10:39 | 1.21m |
| Saturday | High | 16:20 | 3.66m | Saturday | Low | 23:01 | 1.53m | Sunday | High | 04:37 | 3.93m |
| Sunday | Low | 11:42 | 1.06m | Sunday | High | 17:24 | 3.83m | Thursday | Low | 01:00 | 0.00m |
