Conditions at Tywyn in August
August: Lingering Summer Leftovers
August shows the first very subtle signs of the Atlantic reawakening, but at Tywyn it still feels like summer. Average wave height edges up to 2ft (0.6m) and the average period remains low at 6.2s. WSW is the dominant swell direction at 44.6 percent, the largest share of any month, with SW at 19.9 percent and W at 10.8 percent. The distribution is still overwhelmingly small - most waves are in the 0-1m range - although the 1-1.5m (3-5ft) class becomes slightly more visible than July, particularly from WSW. A rare summer cyclone or passing front can deliver a few extra feet, but consistency is poor.
Wind remains the limiting factor, with ideal offshore conditions at only 3 percent and onshore westerly-to-southwesterly flow close to 45 percent. However, August is the warmest month for water, with water temperature reaching 17.7°C, while air temperatures average 15.6°C. Precipitation is moderate at 2.80 mm/day. Small, short-period waves and warm water make August better suited to swimming and longboarding than serious high-performance surfing.
Average Spot conditions at Tywyn in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Tywyn during August. 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 August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Tywyn for August. 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.