Conditions at Lahinch in September
September: The Autumn Rewind
September is where the North Atlantic begins to turn the page back to winter. Average swell height jumps to around 5ft (1.5m) and the period stretches to 10.2s as early-season lows start to spin up off the Canadian coast. W swell is the power player, at 37.0%, with WNW at 21.9% and WSW at 17.1%; now there is a decent slice of 2-3ft-plus waves on the table. The wind is a mixed bag - ideal surf conditions sit at 23%, with NW/NNE/NE/ENE directions providing occasional offshore racetracks, but the return of S/SW/W onshore flow reminds you that winter is coming. Water still holds at 15.7°C, making it a beautiful month to surf without heavy boots while the swell trend is your friend. September is often the pick of the autumn transition: quality is on the rise but the ocean has not yet turned fully hostile.
Average Spot conditions at Lahinch in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Lahinch during September. 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 Lahinch for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Lahinch for September. 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 Lahinch.