Conditions at Mullaghmore Head in September
September: The Atlantic Reawakens
September marks the doorstep of prime time. Average swell climbs to 3-4ft (1.1m) and period rebounds to 10.2s, meaning more of that long-period power that Mullaghmore needs. Swell directions are classic autumn: WNW (35%), W (20%), NW (18%), and NNW (11%), with a noticeable increase in 1.5-2m-plus energy compared to August. The ocean is becoming more active as the North Atlantic storm track intensifies and the first strong lows of the season push toward Ireland. Wind is also favorable: S (8%), SSW (9%), SW (9%), and WSW (10%) dominate, and ideal wind windows sit at 33 percent. With water still at 15.3°C and air averaging 13.7°C, you can score clean, powerful waves in relatively comfortable conditions. September is the classic 'sneak preview' month - the surf isn't yet at full winter roar, but the ingredients are all there.
Average Spot conditions at Mullaghmore Head in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Mullaghmore Head 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 Mullaghmore Head for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Mullaghmore Head 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 Mullaghmore Head.