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Conditions at Rhossili Bay in January
January: Peak North Atlantic Power
January is Rhossili Bay's heaviest month of the year. Average swell heights edge up to 1.6m (5.2ft) and the average period is a solid 10.7s, the highest of the year. The wave rose is dominated by W and WSW swell, with the all-important WSW direction alone accounting for 39.1% of observations and a healthy share arriving in the 1-2.5m (3.3-8.2ft) range. That is prime groundswell territory for the SSW-facing beach. The main enemy is the wind: S/SSW/SW/WSW winds account for over 30% of the hourly data, and with the beach facing into the SSW, that puts a messy chop on the surface. Offshore flow shows up just 9% of the time, but when N/NE winds kick in, the bay can hold overhead, powerful lines. Water temperature sits around 8.4°C, air temperatures average 7.0°C, and rain averages 3.89 mm/day, so bring the thick rubber and pick your windows carefully.
Average Spot conditions at Rhossili Bay in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Rhossili Bay during January. 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 January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rhossili Bay for January. 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.