Diego Garcia Island - surf spot statistics

Diego Garcia Island offers surfable conditions year-round, with consistent swells primarily driven by ground swells, which dominate over wind swells in most months. The best time for surfing is typically from February to April, when a high percentage of ground swells (78–83%) combines with relatively manageable wind conditions (good winds 28–42% of the time). Swell size during this period averages 1.5–1.8m, providing solid but not overwhelming waves. February stands out as the most balanced month, with 82% ground swells, 36% good winds, and 1.6m waves. March follows closely, maintaining similar swell quality with slightly improved wind conditions (42% good winds). From May to October, the swell size increases (2.0–2.6m) as the Indian Ocean generates more powerful ground swells (peaking at 88% in May). However, this period is hindered by extremely poor wind conditions, with bad winds prevailing 91–100% of the time, making it challenging for surfers despite the larger waves. August is particularly harsh, with 100% bad winds and 2.6m swells. The late-year months (November–January) see a return to smaller swells (1.6m) and slightly improved wind conditions, though bad winds still dominate (74–87%). December and January offer decent ground swell percentages (73% and 65%, respectively), but January has the lowest good wind probability (22%). For surfers prioritizing clean conditions, the February–April window is the most reliable, while those seeking bigger (but wind-affected) swells may brave the May–October stretch.

Die surf conditions at Diego Garcia Island in March offer a mix of opportunities and challenges for experienced surfers. The average swell height is 1.5m with a solid 12.5s period, providing decent energy for quality waves. The swell direction is predominantly from the south and southwest, with the majority of waves falling in the 1-2.5m range (peaking around 1-1.5m at 25.22% from the south). This suggests consistent, rideable swells with occasional overhead sets, particularly when SSW and SW swells contribute larger waves (up to 2.5m+ at times). Wind conditions are favorable 42% of the time, with light to moderate speeds (10-20kph) being common from the west and northwest, though stronger winds (20-30kph+) can occasionally create chop, especially with W/WNW directions. The spot’s exposure to southerly swells and its ability to handle westerly winds (which may be cross-shore or slightly onshore) make it a viable destination in March, though surfers should monitor daily wind forecasts to time sessions when lighter winds align with the best swell angles. Expect mostly clean to semi-choppy conditions, with the potential for powerful, well-defined waves when all elements align.