- Home
- ...Europe
United Kingdom- Rhossili Bay
Conditions at Rhossili Bay in September
September: The Autumn Switch Flips On
September marks the beginning of the transition back to winter surf. Average swell heights climb slightly to 0.9m (3ft) and periods lengthen to 8.1s, with the wave rose showing a noticeable increase in the 1-2m (3.3-6.6ft) categories. WSW remains the dominant swell direction at 36.7%, while W adds 24.6%, and the first strongly developed Atlantic depressions can now send more organized groundswell toward the Gower. Wind conditions are more balanced: ideal offshore wind is still only 7%, but NNW flow (9.8%) and NE/ENE flow provide more clean-wind opportunities than July and August. Water temperatures are still comfortable at 16.6°C, air temperatures average 15.2°C, and precipitation creeps up to 2.97 mm/day. September is a shoulder month with plenty of small-to-fun waves and the real possibility of scoring an early-season proper swell before the autumn storms fully rev up.
Average Spot conditions at Rhossili Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Rhossili Bay 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 Rhossili Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rhossili Bay 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 Rhossili Bay.