Baleal seasonal overview
Best Surf Season (October - March)
The North Atlantic flexes its muscles during these months, delivering consistent, powerful swell as the jet stream drives a relentless parade of extratropical cyclones across the basin. Average swell heights hover between 2.5m and 2.8m, with long-period energy (12-13s) that wraps gracefully around the Peniche peninsula to greet Baleal's north-facing breaks. The wind patterns, while still dominated by northerlies, offer a higher percentage of offshore southern quadrants (SSW to SW) during these months—especially in October, where ideal wind conditions peak at 27%. This season is prime time for Baleal, with the potential for pumping, firing waves in the 1.5-2.5m range when a low pressure stalls off the coast and a ridge builds from the south. The NAO index frequently swings negative, amplifying storm tracks and shunting the jet south, which funnels large, clean swell directly into the spot. If you want epic, heavy sessions, this is your window.
Fair Surf Season (April & September)
These transition months bridge the gap between the powerful winter and the sluggish summer. April sees average swell heights drop to 2.1m with a period of 11.2s, while September bounces back slightly to 1.7m and 10.5s. The swell remains predominantly from the NW and NNW—good directions for Baleal—but the energy is less consistent and often mixed with smaller, choppier groundswell. The wind is ideal about 21% of the time, comparable to March, but the lighter pressure gradients mean the northerly onshore flow (N, NNW) is more variable. You'll find fun, rippable waves on the better days, especially when a lingering summer high-pressure system gives way to a weak cold front. It's a fair season—not firing, but reliable enough for good sessions if you time the weather windows.
Low Surf Season (May - August)
Summer settles over the Portuguese coast, and Baleal enters its slow period. The Azores High strengthens, pushing storm tracks north and leaving the region with weak, short-period swell. Average heights drop to 1.5-1.8m, and periods fall below 10s, resulting in choppy, messy conditions for much of the time. The wind is the real culprit here: from June through August, the dominant north-northwest wind blows directly onshore over 60% of the time, with ideal wind percentages plummeting to 11-18%. July is the worst month, with an average height of just 1.5m and a period of 8.6s—groveling territory. The swell that does arrive is mostly windswell from the NNW, which lines up okay but lacks the power to overcome the onshore breeze. On rare occasions, a late-season tropical system or a cut-off low can throw in a fun day, but for the most part, this is a time to explore other spots or enjoy the beach. The waves are small, fun-sized at best, and only for the dedicated.
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Conditions at Baleal in May
May: The Summer Lull Takes Hold
May ushers in the summer surf pattern. Average swell height drops to 1.8m and period to 9.9s, signaling a shift toward shorter-period, less organized waves. The swell rose shows a massive tilt toward the NW and NNW, which together account for nearly 60% of the total energy. However, these are mostly moderate-height waves (1-2m) with little power behind them. The wind starts to worsen: northerlies (N at 27%, NNW at 20.6%) are relentless, and ideal wind percentages fall to just 20%. The majority of the time, the onshore wind creates choppy, messy conditions. Still, May isn't a complete loss. On the rare occasion a late-season cold front sweeps through, it can trigger a burst of longer-period swell (WNW) accompanied by southerly winds. These windows deliver small to fun-sized waves—perfect for groveling or a log session. For the most part, though, May is a month to watch the horizon and wait for the autumn revival.
Average Spot conditions at Baleal in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Baleal 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 Baleal for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Baleal 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 Baleal.
