Agua d'Alto seasonal overview
Best Surf Season (October - April)
The North Atlantic fires up in October, and the Azores-to-Portugal storm track stays active through April. Averages sit between 2.2m and 2.8m (7-9ft) for most of this window, with wave periods hanging in the powerful 10.8-12.3s bracket. The tradeoff is wind: offshore N, NNE, NE and ENE airflow only happens 20-31% of the time, and many days get ragged under the prevailing SW-to-W flow. But when a storm low plants itself west of Portugal and the wind turns offshore behind a cold front, Agua d'Alto sees some of its cleanest, heaviest, long-period surf of the year.
Fair Surf Season (May & September)
May and September are the shoulder months-a true middle ground. Swell averages 1.7-1.8m (6ft) with periods just over 10s, so you are still in the punchy-to-powerful range. Ideal wind percentages rise to 36-40%, the water is warm, and the lighter Atlantic pattern delivers more groomed, rippable waves than the winter chaos.
Low Surf Season (June - August)
Summer reverts to small, clean and fun. The Azores High becomes the dominant feature, pushing the main storm track north of Portugal and dropping Agua d'Alto into the 1.2-1.4m (4ft) range with shorter 9s periods. The compensation is the most reliable offshore wind regime of the year-N through ENE breezes blow 47-60% of the time-so the beach still pulses with playful, groveling waves, especially on the persistent NNW/NW background swell.