Harlech
| Vi | Sá | Do | Lu | Ma | Mi | Ju | Vi | |
|---|---|---|---|---|---|---|---|---|
| Viento |  | | | | | | | |
| Dirección | | | | | | | | |
| Media (kn) | 19 | 12 | 20 | 9 | 19 | 16 | 7 | 10 |
| Racha (kn) | 20 | 14 | 22 | 10 | 24 | 22 | 7 | 14 |
| Olas | | | | | | | | |
| Dirección | | | | | | | | |
| Altura (m) | 1.1 | 0.4 | 1 | 0.7 | 1.5 | 1 | 0.6 | 0.8 |
| Periodo (s) | 5 | 3 | 4 | 7 | 6 | 8 | 7 | 10 |
| Temp. | 9 | 10 | 10 | 9 | 12 | 12 | 13 | 17 |
| Nubes | 100 | 100 | 100 | 73 | 100 | 100 | 49 | 91 |
| Lluvia | 0.1 | 1.4 | 0.4 | 3.3 | 0.8 | 0.4 |