Sagres - surf spot statistics

Best Surf Season (October - March)

The North Atlantic roars to life during the autumn and winter months, bringing the biggest swell of the year to the coast of Sagres. From October through March, the average swell height consistently exceeds 2m, with long-period groundswells (12-13s average) generated by powerful extratropical storms. While the predominant swell direction is from the NW and WNW—which is not optimal for the SSE-facing beaches—there are frequent windows of south quadrant swell (SSE, S, SSW) that deliver clean, lined-up waves. The offshore winds from the N, NNO, NW, and NNW blow reliably around 25% of the time, making for smooth faces. However, the region is also prone to onshore S-SSW winds during stormy intervals, which can quickly turn conditions sloppy. The best sessions occur when a deep low spins up in the mid-Atlantic, sending long-period SSW swell, and the Iberian high pressure parks itself to the west, drawing down a cool northerly breeze. This is prime season for experienced surfers looking for powerful, hollow waves.

Fair Surf Season (April - May & September)

As winter transitions into spring and autumn fades into winter, the surf enters a shoulder season where conditions become more variable. In April and May, the average swell height drops to 1.6-1.9m and periods shorten to 9.8-11.1s. The frequency of south swells decreases, and the dominant NW windswell becomes more prevalent. Still, the northerly offshore winds blow consistently—about 25% of the time—making for clean surfaces on the smaller days. September stands out with the highest percentage of ideal wind (36%) and an uptick in average period to 10.4s. This month often brings the first taste of autumn swell, with occasional south swells sneaking in behind passing weather systems. For the average surfer, this is a reliable window for fun, rippable waves without the heavy crowds of summer.

Low Surf Season (June - August)

Summer in Sagres is characterized by small, short-period swell and high-pressure dominance. Average wave heights hover around 1.4m with periods only 8-9s, meaning most waves are windswell generated by the persistent northerly winds. While the offshore wind direction is favorable (N, NNW), it often blows with strong intensity, with 30-50km/h gusts common in the afternoon. This leads to choppy, bumpy conditions despite the offshore flow. South swell is virtually non-existent during these months (less than 1% of the time combined). The wave quality is best early in the morning before the wind picks up, but overall this is a low season for quality surf. Beginners and longboarders can still get plenty of small waves, but the experienced surfer will want to look elsewhere or wait for a rare southern hemi swell.

September: First Signs of Autumn

September marks a turning point. The average swell height remains modest at 1.5m, but the period climbs to 10.4s, indicating a return of longer-period swell from distant storms. The swell rose still shows a strong NW bias (47.1%) and NNW (25.5%), but the south quadrant begins to reappear with a combined 0.6%. The most encouraging statistic is the ideal wind percentage: 36%, the highest of the year. This is due to a more balanced wind regime – northerly winds are still present but with more light to moderate speeds as high pressure weakens. This combination yields cleaner conditions than midsummer, and the first proper south swells start to sneak in. September is a favourite for local surfers because you can get a fun 1-1.5m swell with offshore winds more than a third of the time. It's a transitional month that rewards patience and can deliver surprisingly good waves.