Conditions at Kolibithra in September
September: The Autumn Re-Awakening
September starts to feel like surfing season again, but only just. Average swell height is 0.9m (3ft), average period is 4.7s, and the ideal wind window is still a lowly 1%. Swell direction is excellent: N is 28.7%, NNW is 36.2%, and NNE is 6.8%, so north pulses are feeding the bay consistently. Wind remains the bottleneck, with NNW blowing 52.5% and N 14.6%, keeping surface conditions rough for much of the time. Late September can see the first true autumn lows enter the Aegean, producing slightly longer 6-8s N/NNE swell and a better chance of offshore southerly winds. When that transition happens, Kolibithra cleans up quickly. Water is still warm at 24.5°C, air temps average 23.3°C, and rainfall is modest at 0.66mm per day, so the rewards are worth the patience.
Average Spot conditions at Kolibithra in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Kolibithra 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 Kolibithra for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kolibithra 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 Kolibithra.