Harlech
| Lu | Ma | Mi | Ju | Vi | Sá | Do | Lu | |
|---|---|---|---|---|---|---|---|---|
| Viento |  | | | | | | | |
| Dirección | | | | | | | | |
| Media (kn) | 8 | 16 | 4 | 25 | 43 | 19 | 29 | 26 |
| Racha (kn) | 10 | 20 | 5 | 30 | 59 | 21 | 38 | 34 |
| Olas | | | | | | | | |
| Dirección | | | | | | | | |
| Altura (m) | 0.6 | 0.8 | 0.4 | 1.9 | 3.1 | 2.2 | 1.2 | 1.2 |
| Periodo (s) | 14 | 5 | 12 | 7 | 13 | 8 | 6 | 17 |
| Temp. | 8 | 7 | 7 | 8 | 11 | 6 | 8 | 8 |
| Nubes | 100 | 100 | 33 | 100 | 100 | 52 | 100 | 100 |
| Lluvia | 2.8 | 0.1 | 8.6 | 12.5 | 1.1 | 0.1 |