Quepos seasonal overview
Best Surf Season (December - March)
During the heart of the dry season, the trade winds relax and the offshore flow from the north-northeast quadrant becomes more regular. Swell from the SSW and SW continues to wrap into the SW-facing beach, but now with cleaner surface conditions. Average wave heights hover around 1.0 - 1.1m with long periods of 12-14s, providing fun, rippable waves on the sets. The percentage of ideal offshore wind peaks at 26-28%, making this the most reliable window for quality surf.
Fair Surf Season (April - May & November)
The transition months see a gradual increase in average swell height to 1.2-1.3m, while the period remains solid at 12-14s. However, the percentage of offshore wind drops to 24-25%, and onshore breezes from the SW become more dominant. Swell from the SSW and SW still provides plenty of energy, but you'll need to pick your windows carefully. Late April and early May often deliver punchy waves before the full onset of the wet season.
Low Surf Season (June - October)
The rainy season takes over, bringing a higher frequency of onshore winds from the SSW and SW – the worst possible directions for Quepos. Although average swell heights climb to 1.3-1.4m with long period of 13-14s, the choppy, wind-affected surface quality drastically reduces surfable opportunities. The percentage of ideal offshore wind falls to 22-23%. Only the rare combination of a strong SSW swell and a brief offshore wind event (usually from the NE) can produce clean, powerful waves.
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Conditions at Quepos in May
May: Peak Swell, Onshore Dominance
May delivers the highest average swell height of the year so far at 1.3m with a long average period of 14.1s. Swell is still predominantly SSW (88.7%) with some SW (11.1%) and a slight increase in larger sizes: 17.8% of waves are in the 1.5-2m range, and 1.2% exceed 2m. Onshore winds now dominate more strongly, with SW (13.8%), SSW (12.8%), S (10.9%), and SSE (10.8%) all contributing. Offshore wind ideal percentage remains at 25%, but the winds are light. Expect some of the year's most powerful swell, but plan around early morning offshore breezes to avoid choppy conditions.
Average Spot conditions at Quepos in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Quepos 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 Quepos for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Quepos 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 Quepos.
