Surf forecastStatisticsHistorical report

Coxos seasonal overview

Best Surf Season (October - March)

The North Atlantic roars to life during the autumn and winter months, delivering consistent, powerful swell from the northwest to west quadrants. Combined with favourable offshore winds from the east, Coxos lights up with long-period, hollow waves. Average swell heights range from 2.0m to 2.6m with periods averaging 11-13s, providing epic conditions for experienced surfers. The winter months (January-February) see the most consistent swell, though storms can bring strong westerly winds, requiring careful timing.

Fair Surf Season (April - May)

As the North Atlantic storm track begins to weaken, swell heights and periods decrease. April still offers decent swell (avg 2.0m, 11s) but wind becomes more variable with increasing north winds. May sees a drop to 1.7m and 10s periods, with more days of onshore flow. Surfable waves are still present, especially on days with easterly winds, but quality is inconsistent.

Low Surf Season (June - September)

The summer months are characterised by small, weak swell and persistent northerly winds that create choppy, onshore conditions. Average heights fall to 1.4-1.6m and periods drop to 8-9s, resulting in slow, gutless waves. The wind is ideal less than 20% of the time, mostly during occasional easterly wind events. While the swell direction is often from the NW, the lack of power and poor wind make for challenging surfing. Occasional south swells can offer relief, but generally, this is a time for rest or rope climbing.

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Conditions at Coxos in September

September: Autumn Hints, Still Summer Hangover

September is a transitional month that still feels like summer but teases with the return of real swell. Average height remains modest at 1.6m, but the period climbs back to 10.5s — entering the powerful zone. Swell direction shifts slightly toward more NW (36.0%) and WNW (15.4%), a better angle for Coxos. Ideal wind jumps to 20%, as the N wind machine weakens (34.3%) and offshore easterlies become more frequent. Waves in the 1.5-2m range become more common, and the longer period starts to shape up the reef. September can serve up absolute gems when a low-pressure system dips south and sends clean WNW swell under light offshore winds. It's a month of hope, where the potential for excellent sessions slowly builds through the weeks.

Average Spot conditions at Coxos in September

Swell history for September

0 - 0.5
0.5 - 1
1 - 1.5
1.5 - 2.0
2.0 - 2.5
> 2.5 m

Wind history for September

0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
> 50 km/h

Swell quality

Analyze the groundswell consistency at Coxos during September. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Coxos for your next trip in September.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Coxos for September. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Coxos.

Swell with good wind

Swell with good wind by size