Big Rock - surf spot statistics

Best Surf Season (October - March)

The winter half-year brings the most consistent swell to Big Rock, driven by the powerful NE monsoon that whips up windswell across the Bay of Bengal. Swell directions favor the optimal NE, ENE, E and ESE sectors, with wave heights averaging 0.9m to 1.2m and periods often in the rideable 6-9s range. The catch? The monsoon winds are predominantly from the NE and ENE as well, meaning onshore conditions dominate most days. When a cold front or a passing low-pressure system shifts the wind to the offshore SW-WNW quadrant for a day or two, the stars align and the point truly lights up. These windows are rare but gold - especially in October and March when transitional weather patterns offer the best ratio of clean to messy.

Fair Surf Season (April - June, September)

As the NE monsoon fades and the SW monsoon ramps up, the wind regime flips. From April through June, offshore winds from the SW, WSW and W become increasingly frequent, climbing from 36% ideal in April to 67% in June. The catch here is that the swell concurrently swings to the south and southeast - from the SSE and S directions - which rarely hit the ENE-facing coastline at an effective angle. Waves become soft, weak and small (0.8-1.0m), better suited for a longboard or a groveler. September offers a similar pattern, with a lingering SW flow and small S-SSE swell, but the occasional pulse of E energy hints at the upcoming switch.

Low Surf Season (July - August)

Peak summer delivers the best offshore wind percentages of the year - 76% in July, 78% in August - but this comes at the cost of swell quality. The swell is almost exclusively from the SSE and S, directions that offer little to no breaking energy at Big Rock. Wave heights hover around 1.0m but with poor shape, often weak and fat. The long period (9.2-9.4s) suggests southern hemisphere groundswell is reaching the region, but it's largely wasted on this east-northeast facing spot. Expect small, clean waves for logging or a grovel board - and keep an eye out for the rare outlier typhoon swell that could break the monotony.

December: Peak Power, Peak Frustration

December is the apex of the NE monsoon. The swell is massive in potential: the average height reaches 1.2m, and a whopping 83% of the swell comes from the ideal ENE (42.4%), E (33.8%), and NE (6.9%) sectors. The period is a short 6.9s (windswell), but occasional pulses from longer-period groundswell are possible. The wind, however, is the absolute worst of the year. NE (40.6%) and NNE (30.4%) dominate, with ideal offshore wind at a pitiful 3%. This means 97% of the time the wind is onshore or side-onshore, making the waves bumpy, closey and frustrating. The rare anti-cyclonic event that parks a high over the Bay of Bengal can funnel in a SW wind, and when that aligns with a fresh ENE swell, you get the definition of pumping. It’s a month of extremes: mostly skunk, but when it comes together, it can be the heaviest and best of the year.