Conditions at Monte Clerigo in September
September: Autumn's First Promise
September marks the turning point. Average swell height remains modest at 5ft (1.5m), but the period climbs back to 10.6s, signalling the return of more organised swell. The W, WNW, NW and NNW window still produces 92% of the wave energy, with NW at 52.7%, and the ideal offshore wind window improves to 18%. NNW wind remains the most common direction at 36.4%, but the strong 20-30kph gusts of mid-summer are less frequent. Water temperature reaches its yearly maximum of 18.3°C, air temperature averages 21.3°C, and rainfall is still low at 0.77mm/day. September is a sneaky-good month when the Azores High relaxes and the first Atlantic lows brush the Alentejo coast.
Average Spot conditions at Monte Clerigo in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Monte Clerigo 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 Monte Clerigo for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Monte Clerigo 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 Monte Clerigo.