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.

March: Spring Transition Begins

March sees the first signs of a transition as average swell height drops slightly to 2.2m and period shortens to 12.3s. The NW quadrant still dominates (27.6% from NW, 17.4% from WNW), but south quadrants gain a bit of ground, now accounting for about 2.2% combined. The offshore wind fraction remains similar (N 17.3%, NNW 18.0%, NNE 6.1%, NW 7.8%) yet the ideal wind score stays at 25%. The Atlantic storm track starts to shift north, reducing the frequency of deep lows near Portugal. This means fewer extreme swell events, but more mixed swells that combine windswell and groundswell. The best windows occur when a southern hemi storm sends long-period energy northward, and a high pressure ridge over the Bay of Biscay funnels a light northerly wind into the Algarve. Those days produce clean, punchy barrels on the sets.