Nigels Weather Island
| Porthdinllaen Tide Tables |
| (All times are shown in GMT) |
| Day | Tide | Time | Height | Day | Tide | Time | Height | Day | Tide | Time | Height |
| Thursday | High | 01:42 | 3.63m | Thursday | Low | 08:49 | 1.78m | Thursday | High | 14:14 | 3.44m |
| Thursday | Low | 21:13 | 2.01m | Friday | High | 02:45 | 3.29m | Friday | Low | 09:54 | 2.11m |
| Friday | High | 15:28 | 3.26m | Friday | Low | 22:36 | 2.23m | Saturday | High | 04:18 | 3.09m |
| Saturday | Low | 11:19 | 2.26m | Saturday | High | 17:01 | 3.27m | Sunday | Low | 00:06 | 2.18m |
| Sunday | High | 05:59 | 3.16m | Sunday | Low | 12:38 | 2.16m | Sunday | High | 18:18 | 3.47m |
| Monday | Low | 01:17 | 1.91m | Monday | High | 07:01 | 3.41m | Monday | Low | 13:35 | 1.90m |
| Monday | High | 19:09 | 3.76m | Tuesday | Low | 02:05 | 1.57m | Tuesday | High | 07:43 | 3.67m |
| Tuesday | Low | 14:17 | 1.60m | Tuesday | High | 19:47 | 4.04m | Wednesday | Low | 02:41 | 1.24m |
| Wednesday | High | 08:16 | 3.89m | Wednesday | Low | 14:51 | 1.31m | Wednesday | High | 20:19 | 4.29m |
