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Conditions at Portrush in July
July: High Pressure Haze
July is the heart of the North Atlantic summer lull. Average swell is around 3ft (1.0m), the period bottoms out at 8.1s, and although the direction rose still points hardest at WNW at 32.6% and W at 28.6%, those waves lack the period and pressure behind them to make Portrush turn on. Ideal offshore wind sits at 18%, so there are clean, glassy mornings, but the onshore NNW/NW flow is even more frequent - NNW is the single biggest wind direction at 12.4%. This is a month for longboards, fun shapes and a zero-expectation approach.
Air temps reach 14.2°C, water warms to 14.8°C, and rain sits at 3.34 mm/day. If the surf is too small, the beach itself is not a bad consolation prize.
Average Spot conditions at Portrush in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Portrush during July. 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 Portrush for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Portrush for July. 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 Portrush.