Conditions at Sines in July
July: Peak Summer Lull, But Clean as It Gets
July is the peak of the summer lull. Average swell height holds at 4.3ft (1.3m), and average period bottoms out at 8.6 seconds, which is short-period and often messy unless the wind is offshore. The swell distribution is extraordinary: NW alone accounts for 69.6 percent of all readings, with NNW and WNW adding another 28 percent. There is essentially no S/SW energy in the mix, so do not expect winter-style groundswell. What July lacks in size it makes up for in texture, with ideal wind 59 percent of the time. The recurring offshore N/NNE/NE and NNW winds can put a nice line on the smaller, punchy waves, especially in the early morning before the sea breeze kicks up.
Air temperatures average 22.7°C and rainfall is negligible at 0.06 mm per day. Water temps are a comfortable 17.0°C, making it a good month for longboards and small-wave boards.
Average Spot conditions at Sines in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Sines 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 Sines for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sines 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 Sines.