Conditions at Gruissan in May
May: Small but Directionally Active
May marks the start of the summer flat spell, with average height down to 2-3ft (0.6-0.9m) and period falling to 4.6s. Interestingly, the E/ESE/SE/SSE swell directions remain very prominent in the statistics, over 43% of the wave rose, but almost all of that energy is in the 0-1m range. It's the classic build-up of Mediterranean sea breeze and thermal low systems: direction is fine, but there is simply no power. Ideal wind drops to 14%, and the NW/WNW offshore flow produces surface texture more than surfable swell. Water warms to 16.7°C, air temps average 16.6°C, and precipitation is 1.60 mm/day. Spring lows can still deliver a fun-sized day, but longboards and low expectations are the rule.
Average Spot conditions at Gruissan in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Gruissan 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 Gruissan for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gruissan 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 Gruissan.