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.

June at Diego Garcia delivers consistent surf with an average swell height of 2.3m and a solid 13.3s period, indicating powerful, well-spaced waves. The swell predominantly comes from SSE (46.5% of waves between 1.5-2.5m) and S (22.5% in the same range), offering clean, organized lines. However, larger sets exceeding 2.5m are rare (just 1.85% combined). Wind conditions are less favorable, with only 1% of days providing ideal offshore winds—most winds blow from ESE/SE (20-30kph, 42.19% combined), creating cross-shore chop. Expect surfable conditions frequently, but wind quality is the limiting factor; early mornings may provide brief clean windows before prevailing SE breezes pick up. Intermediate to advanced surfers will find the most opportunities, with occasional overhead+ days.