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.

In November, Diego Garcia offers surfers decent but somewhat inconsistent conditions. The average swell height is 1.6m with a solid 11.3s period, suggesting well-spaced, relatively clean waves. Most swells come from the SSE (28.6% of waves in the 1.5-2m range) and SE (13.5% in 1.5-2m), aligning best with the beach’s orientation for rideable shoulders. However, wave size drops off quickly, with only 4.1% reaching 2-2.5m, meaning bigger days are rare. Wind conditions are hit-or-miss—only 13% of the time are winds ideal (light offshore or cross-shore). The wind is predominantly easterly (ENE-ESE) at 10-30kph, which can create chop, though mornings may see lighter winds. WSW and WNW winds bring stronger gusts (20-40kph) at times, further disrupting conditions. Overall, November delivers rideable waves, particularly mid-sized SSE swells, but wind reliability is low, requiring patience for clean sessions.