Conditions at Spiekeroog in May
May: Small Summer Swell and Light Offshore Windows
May is the beginning of the true low season. The average swell height has dropped to around 3ft (0.9m) and the average period is just 5.4s, putting most waves firmly in the small, messy, groveling category. NNW remains the dominant swell direction at 22.8%, followed by NW at 16.9% and W/WNW at about 10% each. While these directions point directly into the island's banks, the wave heights are overwhelmingly small: most observations are below 1m (3ft). The wind data show a more balanced pattern, with a strengthening NE-E flow at times and the offshore S/SSW/SW sector still producing some clean days. With ideal wind only 10% of the time, you have to pick your sessions carefully. When it does clean up, expect fun-sized, rippable 2-3ft (0.6-1m) waves rather than anything powerful. Air temperatures average a pleasant 10.9°C and water temp is 11.8°C, so spring suits are starting to feel comfortable.
Average Spot conditions at Spiekeroog in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Spiekeroog 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 Spiekeroog for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Spiekeroog 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 Spiekeroog.