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Conditions at Rosie's Bay in April
April: Spring Swells and Shifting Winds
April is a month of transition at Rosie's Bay. The average swell height drops to 1.9m (6.2ft) - still fun to solid - with a period of 11.8s. The swell direction now swings more westerly: W leads with 30.2% and WSW is right behind at 29.0%, while SW (12.3%) and SSW (5.4%) fill out a very directionally clean window. However, the wind regime becomes more problematic. Ideal offshore winds fall to just 33% as the Aleutian Low weakens and the Pacific High starts to build. The dominant wind directions are now WNW (14.9%) and NW (11.2%), which are cross-onshore at this exposed spot, alongside SE (12.0%) and ESE (9.2%). Still, when a high-pressure ridge delivers early-morning offshore E/NE flow, the long-period WSW groundswell can turn the bay clean and rippable. Spring air reaches 7.7°C, water warms to 9.7°C, and rain eases to 5.1mm/day - spring suits arrive, but keep the hood close by.
Average Spot conditions at Rosie's Bay in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Rosie's Bay during April. 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 Rosie's Bay for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rosie's Bay for April. 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 Rosie's Bay.