Conditions at Tywyn in March
March: Early Spring Pulses
March is the first transition month, and the data still look surprisingly wintry. Average swell height drops only to 3ft (0.9m) and the average period holds at 8.2s, while WSW at 37.4 percent and SW at 22.1 percent continue to dominate the swell rose. The percentage of 5ft-plus (1.5m+) waves falls to around 12 percent, but the North Atlantic still has enough energy left for regular chest-to-head-high days. W and WNW swells add another 19.1 percent of the directional spread, so Tywyn's exposure remains fully open to the best swell window.
Offshore wind is slightly harder to come by in March, with ideal conditions at only 9 percent. Onshore westerlies still hold a firm grip on the Welsh coast, but the average precipitation drops to 2.57 mm/day and the average air temperature rises to 6.8°C, bringing slightly drier, lighter spring mornings. Water temperature is still a cold 7.6°C, so winter rubber remains essential. If a blocking high sets up shop in the North Sea, an E to NE offshore flow will transform those average west swells into clean, rippable waves.
Average Spot conditions at Tywyn in March
Swell history for March
Wind history for March
Swell quality
Analyze the groundswell consistency at Tywyn during March. 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 March.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Tywyn for March. 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.