Monte Clerigo seasonal overview
Best Surf Season (October - March)
The North Atlantic winter engine fires on all cylinders from October through March, delivering consistent, powerful swell to Monte Clerigo. Average wave heights hover between 1.9m and 2.5m, with long-period (12-13s) groundswells from the W, WNW, and NW dominating the spectrum. Ideal offshore winds from the W/SW quadrant blow clean 25-33% of the time, often associated with post-frontal high pressure that sets up glassy mornings. This is prime time for Monte Clerigo to live up to its reputation as a powerful beach break.
Fair Surf Season (April & September)
April and September serve as transitional months where the surf is still rideable but less consistent. Swell heights average 1.5-1.9m with periods dropping to 10-11s. While the W/NW swell window remains active, the frequency of strong storms decreases. Ideal wind percentages drop to 18-19%, but occasional easterly wind events can still produce clean conditions. The main challenge is the increasing northerly wind component, which tends to add cross/onshore chop.
Low Surf Season (May - August)
Summer brings a dramatic lull in surf energy. Average heights drop to 1.4-1.6m with short-period (8-10s) NW windswell dominating. The infamous Portuguese nortada (north wind) becomes the dominant pattern, with NNW-N winds blowing 40-60% of the time, putting the spot onshore and choppy. Ideal offshore wind opportunities plummet to just 7-16%. Only the occasional southwesterly wind or distant Southern Hemisphere swell can salvage a session, but overall it's a time to explore other spots or travel.
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Conditions at Monte Clerigo in December
December: Heavy and Consistent
December is the climax of the winter swell season. Average swell height is 2.4m, period 12.7s. NW (25.1%) and WNW (16.8%) lead the swell directions, with a significant amount in the 2-2.5m and over-2.5m categories. The wind is ideal 33% of the time, the highest of the year. Offshore winds (W through SSW) constitute about 17% of observations. The northerly winds are present but less frequent. December's surf is driven by deep Atlantic lows that can produce XL swells. When the wind aligns from the southwest, Monte Clerigo offers heavy, barreling waves. The biggest sessions often come around the winter solstice, when storm tracks are most active. Expect solid groundswells with periods exceeding 15s—this is charging territory. Stay frosty and watch the buoys.
Average Spot conditions at Monte Clerigo in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Monte Clerigo during December. 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 Monte Clerigo for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Monte Clerigo for December. 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 Monte Clerigo.
