Mira - surf spot statistics

Best Surf Season (October - March)

The North Atlantic roars to life during the autumn and winter months, delivering the most consistent and powerful swells to Mira's west-facing shores. Average swell heights range from 2.0m to 2.5m, with periods frequently exceeding 12 seconds, fueled by a parade of extratropical cyclones tracking across the North Atlantic. Wind patterns become more favorable as high-pressure systems shift south, with ideal offshore flow (from the west-southwest through west-northwest) occurring 40-50% of the time. This is prime time for XL waves and long-period groundswells, especially when a deep low pressure system aligns with a stable continental high, creating clean, glassy conditions. December and January are the peak months, often rewarding surfers with epic, pumping surf.

Fair Surf Season (April - May & September)

As the transition zones of spring and early autumn, these months offer a mixed bag but can produce excellent surf. Swell heights drop to a more manageable 1.6m-2.0m range with periods averaging 10-11 seconds, making for rippable, fun-sized waves. The jet stream begins to shift north, reducing the frequency of powerful storms, but strong Atlantic lows can still deliver solid WNW-NW swell windows. Wind patterns become more unpredictable; the percentage of favorable offshore flow decreases to around 21-29% in spring, then climbs back to 25% in September as the summer pattern breaks down. Surfers need to stay flexible, hunting for windows of clear skies and east-northeast winds that sometimes follow a passing trough.

Low Surf Season (June - August)

Summer brings the least promising surf conditions to Mira. The North Atlantic high-pressure system dominates, shifting storm tracks well to the north and shrinking the average swell height to a mere 1.4m-1.5m. Wave periods shorten to 8.6-9.2 seconds, producing mostly short-period, localized windswell rather than powerful groundswell. Offshore wind frequency plummets to a dismal 9-13%, with persistent onshore winds from the northwest quadrant (generally NW-N) ruining the texture. While an occasional pulse of longer-period swell from a distant hurricane or rare low can sneak in, surfers will generally face small, choppy, and blown-out conditions. This is a great time to travel to more reliable spots or explore other activities.

March: Transition to Spring

March marks the beginning of the transition to spring, yet still delivers solid surf. Average swell height eases to 2.3m with a period of 12.2s, reflecting a slight decrease in storm intensity. Swell direction remains dominated by NW (24.2%) and WNW (20.5%), but there is a noticeable uptick in NNW swell (11.1%) and W swell (7.5%). This means the swell window broadens, offering more variety. The ideal wind frequency drops to 37%, as the continental high weakens and the Icelandic low shifts, bringing more frequent troughs and onshore winds from the north (13.2%) and north-northwest (14.1%). Despite this, March can still produce classic Mira sessions, especially when a strong low stalls off the coast and pulls in light easterly winds. Waves are often punchy and rippable in the 1.5-2.5m range.