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 May
May: Spring Fatigue — Smaller Swell, Fickle Winds
May is a frustrating month for the Coxos devotee. Average swell height falls to 1.7m and period to 9.9s, moving into the small, fun-sized zone. The swell direction is dominated by NNW (31.5%) and NW (30.5%), which are slightly less favourable than the W-WNW groundswell that truly works best. Ideal wind plummets to 13%, with N winds becoming very strong (29.8% total, with 10.4% in the 20-30kph range). These strong N winds are cross-offshore but often create chop and texture. The average period now sits in the average, punchy range, so waves lack that long-period power. April's remnants of winter can still produce the odd south swell, but May generally requires a groan-and-go mindset — small boards and a tolerance for sub-optimal conditions.
Average Spot conditions at Coxos in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Coxos during May. 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 May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Coxos for May. 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.
