La Chiesa - surf spot statistics

Best Surf Season (December - February)

The heart of winter delivers the most consistent and rideable conditions at La Chiesa. With an average swell height hovering around 0.9-1.0m and periods just below 6s, the North Atlantic low-pressure systems send pulses of groundswell that wrap into the southern bight. The real key, however, is the wind: offshore flow from the north-northwest (N, NNW, NW) peaks during these months, clocking in at ideal conditions 27-29% of the time. When a strong high-pressure system settles over the Alps and a deep low sits in the Gulf of Genoa, we see clean, lined-up waves with enough punch to make the grovel boards feel alive. This is the window to plan your strike mission.

Fair Surf Season (March - April & October - November)

The transition months offer a mixed bag. In spring, the jet stream starts to lift north, weakening the Atlantic storms. Swell heights drop to 0.8m and wind consistency starts to fade – offshore flow only occurs 21-22% of the time. However, occasional late-season cold fronts can still deliver a few days of shoulder-high surf with clean north winds. Similarly, autumn (Oct-Nov) sees a gradual ramping up of swell as the planet tilts toward winter. October’s averages are still modest (0.7m, 5.0s), but by November the swell picks up to 0.9m and the wind statistics improve to 23% offshore. These months are a gamble – you might score a sunny fall session with a crisp offshore breeze, or you might get skunked by long periods of onshore ESE winds.

Low Surf Season (May - September)

The Mediterranean summer is a tough stretch for La Chiesa. From May through September, the average swell shrivels to 0.5-0.6m with periods languishing in the 4-5 second range. The wind machine also shuts down – ideal offshore flow plummets to 14-17%. The dominant swell comes from the west and northwest, which barely wrap into this south-facing nook, while southerly swells that do hit are often accompanied by onshore winds from the same quadrant. You’ll find more flat days than rideable ones, and when there is energy, it’s usually weak, wind-affected, and better suited for a longboard or a stand-up paddle. The few windows that open up come when a rare northerly ‘tramontana’ wind blows offshore on a long-period southerly groundswell – but those are the exception, not the rule.

December: Peak Season at La Chiesa

December hits the peak of the winter surf season. Average swell height tops out at 1.0m, the highest of the year, with a period of 5.8s. The wind plays along perfectly: ideal offshore conditions occur 29% of the time – also the annual high. Swell from the optimal SE-SSW directions accounts for 23.9%, while the dominant W/WSW wedge (27.6%) provides the secondary source. The higher period means waves have more punch, with 12.4% of observations falling in the 1-1.5m ‘fun’ range and 14.6% in the 1.5-2.5m ‘pumping/firing’ category. The best conditions arise when a powerful low-pressure system sits in the Gulf of Genoa, wrapping a strong NW wind down the coast and generating a southwesterly swell that wraps into the bay. With the long-period component, these waves can offer powerful, clean lines. December is the month to score cold, offshore barrels and winter sun. It doesn’t get better than this.