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Conditions at Gas Bay in May
May: Building Winter Swell, Best Wind Odds
May delivers the first serious winter swells of the year. The average wave height jumps to 2.3m (7.5ft) while the average period stretches to 12.9s. Southwest swell leads the pack at 33.0%, and the westerly window widens: WSW jumps to 16.5%, W adds 5.0% and WNW begins to contribute 2.6%. There is more 2.5m+ (8ft+) energy in the mix, and the direction of the bigger sets is mostly SW/WSW - perfect for Gas Bay. Importantly, May posts the highest ideal wind percentage of any month at 29%, with a good share of NE and E offshore flow. It's still not clean all the time - W and WSW winds can be onshore and strong - but the ratio of quality to size is excellent. Water temperatures cool to 20.2°C, air temps drop to 17.1°C on average, and rainfall rises to 2.84mm/day. These are the building blocks of a proper winter swell window.
Average Spot conditions at Gas Bay in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Gas Bay during May. 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 Gas Bay for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gas Bay for May. 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 Gas Bay.