Conditions at Arish in September
September: First Swell Pulses Return
September is the first hint that winter is coming back. Average swell height is the lowest of the year at 1.3m (4-5ft), but the period has already begun to climb, averaging 8.4s. The directional makeup is still summery: N (36%), NNE (22%) and NNW (39%), with a few faint NW pulses. The trades remain prominent, with NNE at 51% and NE at 20%, but the ideal-wind percentage doubles from August to 20%, meaning we are starting to see more light-wind windows. This transitional energy can still be short-period, but those early autumn North Atlantic storms are beginning to push farther south, and the first 10-12s swells of the season become possible.
It is a month for watching forecasts closely. When a proper low forms off the eastern seaboard, Arish can suddenly light up with clean, glassy surf after months of windswell mediocrity. Water temperature is 20.7°C and rain remains rare; the changing season is the story.
Average Spot conditions at Arish in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Arish 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 Arish for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Arish 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 Arish.