Conditions at Seinesodden in May
May: The Summer Lull Begins
May is when Seinesodden slides into the low season. Average swell height drops to 3ft (0.9m) and the period shortens to 8.6 seconds, so most waves are small, fun-sized grovelers rather than powerful groundswell. The swell directions are still predominantly WSW at 24.6% and W at 19.0%, with WNW at 11.8%, NNW at 10.9% and NW at 10.1%, but a large portion of that energy is in the 0.5-1m category. The bigger problem is wind: offshore flow from E/ESE/SE/SSE falls to around 25.6%, while SW becomes the leading wind direction at 11.4%, with WSW at 8.4% and NNW at 8.7% adding onshore texture. Ideal surf wind only occurs 29% of the time. Spring warmth is relative: air averages 3.4°C, with extremes from -7.3°C to 18.5°C; precipitation is 3.63 mm/day and water temperature rises to 7.1°C. Good days exist, but you have to pick your window carefully.
Average Spot conditions at Seinesodden in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Seinesodden 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 Seinesodden for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Seinesodden 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 Seinesodden.