Conditions at Crab Island in November
November: Full Storm Mode
November is the full North Atlantic storm mode. Average swell height reaches 6-7ft (1.8-2.1m) and the period stretches to 11.6 seconds, ensuring a constant stream of powerful groundswell. The swell directions are classic and heavy: W at 26.0%, WNW at 18.4%, WSW at 14.0%, and NW at 4.6%, with the 1.5-2.5m (5-8ft) band packing the most energy and more than a few waves piling up over 2.5m (8ft).
Wind is the great filter, as always. Ideal wind sits at 14%, with offshore ENE-to-SE flow at 18.6% and the onshore westerly sector at 32.7%. November low pressure systems can swing wildly, so you will need patience and a good forecast. When a high-pressure ridge moves in and the wind flips to O or OSO, Crab Island is a scary, beautiful place, hauling thick, hulking W/WNW groundswell. Air temps fall to 9.2°C, water to 11.7°C, and rainfall jumps to 4.93mm/day, about as wet as the Irish surf dream gets.
Average Spot conditions at Crab Island in November
Swell history for November
Wind history for November
Swell quality
Analyze the groundswell consistency at Crab Island during November. 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 Crab Island for your next trip in November.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Crab Island for November. 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 Crab Island.