Portmarnock
| Th | Fr | Sa | Su | Mo | Tu | We | Th | |
|---|---|---|---|---|---|---|---|---|
| Wind |  | | | | | | | |
| Direction | | | | | | | | |
| Average (kn) | 7 | 9 | 11 | 13 | 12 | 6 | 13 | 12 |
| Gust (kn) | 10 | 11 | 16 | 18 | 25 | 10 | 18 | 17 |
| Waves | | | | | | | | |
| Direction | | | | | | | | |
| Height (m) | 1 | 0.9 | 1 | 2.2 | 0.9 | 0.5 | 1.1 | 2.2 |
| Period (s) | 5 | 5 | 5 | 6 | 5 | 16 | 5 | 7 |
| Temp. | 9 | 7 | 7 | 9 | 7 | 8 | 7 | 7 |
| Clouds | 77 | 100 | 4 | 76 | 100 | 100 | 95 | 100 |
| Rain | 0.1 | 0.1 |