Conditions at Bundoran in September
September: September Stirrings
September is when Bundoran starts to wake from its summer sleep. The average swell height climbs back to 3-4ft (1.1m) and period rises to 10.2s, a clear sign that longer-period Atlantic energy is returning. The wave rose shows a distinct upward shift: WNW jumps to over 34 percent and W swells strengthen, with a solid portion of waves in the 1-1.5m and 1.5-2m bands. The first genuine groundswell pulses of autumn are definitely on the menu.
Conditions can still be inconsistent, and afternoon sea breezes remain a factor, but ideal offshore wind improves to 25 percent. September is also one of the most pleasant months to surf: air temperatures hold at 12.4°C, water is still warm at 15.3°C, and the autumn storm track is just beginning to fire up. If you time the early autumn lows well, Bundoran delivers a sneak preview of the winter goods.
Average Spot conditions at Bundoran in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Bundoran 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 Bundoran for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Bundoran 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 Bundoran.