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.

April at Diego Garcia offers decent surf conditions with some promising swells for experienced surfers. The average swell height is 1.8m, paired with a solid 13.0s period, indicating well-spaced, powerful waves. Most swells arrive from the south and southeast, with the majority falling in the 1-2.5m range (SSE: 28.30% at 1.5-2m, S: 13.70% at 1.5-2m). Larger waves (2-2.5m) occur about 10-12% of the time, providing occasional punchy sessions. Wind conditions are relatively favorable, with 28% of winds being ideal for surfing, predominantly lighter easterlies and southerlies under 20kph. However, stronger trade winds (20-30kph) from the east-southeast occur roughly 9% of the time, which may create choppier conditions. Overall, April delivers a mix of clean, mid-sized swells with enough consistency and power for advanced surfers, though wind variability can impact session quality.