Assinie • Surf Spot Statistics

Best Surf Season (December and January)

Assinie faces squarely into the southern Atlantic, and its waves are driven by S and SSW groundswell rippling out of mid-latitude South Atlantic storms. The best combination of clean surface conditions and rideable swell happens during the heart of the northern winter, when the Intertropical Convergence Zone migrates south and the West African monsoon weakens. At this time, the average swell height drops to about 3ft (0.9m), but the average period stays in the powerful 10.5-10.8s band. More importantly, offshore flow from the N, NNE, NE and NNW quadrants can blow around 9-10% of the time, and the usual SW/S wind machine is much less intense. The result is clean, punchy, long-period beachbreak surf in the 2-4ft (0.6-1.2m) range, with occasional bigger sets when a pulse of S/SSW swell fills in. It is not the biggest time of year, but it is by far the most surfable.

Fair Surf Season (November and February-May)

During the long shoulder season, Assinie is caught between the fading winter high pressure and the strengthening South Atlantic storm track. Swell sizes build steadily from 3ft (0.9m) in November to around 4ft (1.2m) by May, while periods hover between 10.8 and 11.7s. This is a promising setup: long-period S and SSW swell is present nearly 100% of the time. But the onshore monsoon begins to strengthen, especially from March onward, with SW winds becoming dominant and ideal wind windows dropping to just 3-6%. Quality is highly dependent on catching brief cleaner windows, usually in the early morning before the sea breeze builds or when the wind shifts offshore from the north. When that happens, the combination of solid, long-period groundswell and glassy conditions makes Assinie genuinely fun.

Low Surf Season (June-October)

Assinie's most frustrating period for surf quality runs from June through October. Paradoxically, this is also the peak wave-production season in the South Atlantic: average swell heights reach 1.2-1.3m (4ft) with long periods of 11.1-11.7s, and we occasionally see sets in the 5-6.5ft (1.5-2m) range. But the same atmospheric pattern that fires up the South Atlantic storms also strengthens the SW monsoon over West Africa. Ideal offshore wind percentages bottom out at 0-3%, and SW/S/WSW onshore winds often exceed 90% of the observations, frequently in the 10-20kph bracket. The surf is consistently blown out, lumpy and hard to read. On the rare days when a northerly wind surge or a light land breeze coincides with the groundswell, it can be genuinely good, but those windows are the exception, not the rule. Within this stretch, early June and late September offer the best chances of catching one of those rare windows before the monsoon settles in or as it begins to retreat.