Conditions at Tywyn in May
May: The Summer Lull Creeps In
By May, summer is knocking on the door. The average wave height holds at 2ft (0.6m), but the average period slips to 6.9s, telling the story of a swell source dominated by local windswell rather than distant Atlantic storms. WSW accounts for 34.3 percent of the directional swell distribution and SW for 20.4 percent, while NW and WNW combine for another 18.1 percent. That means there is almost always something coming from a workable direction, but the size is small and the period is short; most sets wallow in the 2-3ft (0.6-0.9m) range and need offshore wind to bring any sort of shape.
Ideal wind conditions fall to just 5 percent in May, with onshore SW, WSW, W and WNW winds contributing about 31 percent of the wind rose. E and ENE winds remain relatively common at light speeds, so the chance of a clean morning exists, but many afternoons will be soft. The weather turns milder, with average air at 11.1°C and water temp up to 12.3°C, while precipitation sits at 2.14 mm/day - one of the drier months. A longboard and a dawn patrol are the keys to making the most of May.
Average Spot conditions at Tywyn in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Tywyn 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 Tywyn for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Tywyn 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 Tywyn.