Indonesia · Indo-Pacific
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The Mentawai Islands are Indonesia's ultimate surf playground: an archipelago off western Sumatra hosting dozens of world-class reef breaks including Macaronis, Lance's Right (HT's), and Telescopes. The waves break over pristine coral reefs with mechanical perfection, producing barrels and high-performance walls in warm, crystal-clear tropical water. Access is primarily by charter boat, creating an expedition-style experience. The sheer density of quality waves within the island chain is unmatched anywhere on Earth.
South-westerly Indian Ocean groundswells arrive from March through November, with April through October being the prime window. The dry season (May-September) provides the most consistent offshore winds and swell. Individual breaks face different directions, ensuring something is working regardless of swell angle. The variety means conditions somewhere in the chain are perfect on virtually any day during the season.
Each break has its own take-off zone over the specific reef configuration. Macaronis produces a fast, mechanical left over a shallow coral shelf. Lance's Right offers a powerful, barreling right. Telescopes provides a long, high-performance left. Your charter boat captain will position the vessel in the channel adjacent to whichever break is working best for the conditions.
The coral reefs throughout the Mentawais are extremely shallow and razor-sharp. Severe lacerations are near-inevitable over a trip. Many breaks are dangerously shallow at lower tides. The remote location means limited medical facilities (basic clinics on some islands, but the nearest hospital is on the Sumatran mainland, hours away by boat). Tropical infections develop rapidly from untreated cuts.
Access is by charter boat from Padang (12-14 hour sail) or by speedboat transfer to specific islands with surf camps. Charter trips typically last 10-14 days. Land-based camps on some islands offer budget alternatives to boat charters. The boats anchor in channels adjacent to breaks, and surfers paddle directly from the boat.
The Mentawais have become increasingly popular and the prime breaks (particularly Macaronis and HT's) can see 20-30 surfers during peak season. Charter boats coordinate informally to distribute between spots. The more remote or less-known breaks remain uncrowded. Off-season trips (March, October-November) offer thinner crowds.
Bring at least three boards. The reefs destroy equipment, and a broken board with no replacement ends your trip. Reef boots are essential. Pack comprehensive first aid including antibiotics, betadine, waterproof dressings, and butterfly closures. Cuts will happen; immediate treatment prevents infection. Mid-tide sessions are safest across all breaks. Respect the indigenous Mentawai communities; their islands are not merely a surf park. A 12-14 day charter provides the best odds of scoring multiple world-class sessions.
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Based on historical weekly averages
Combining historical conditions with school holiday crowd pressure to find the sweet spot.
How busy each week is based on school holiday overlap from feeder markets.
The timing score combines two signals: historical conditions quality (how good the skiing or surfing typically is in a given week, based on 5 years of weather data) and crowd pressure (how many of this destination's feeder markets have school holidays that week).
Crowd pressure is weighted by each feeder country's share of visitors. If 40% of a resort's visitors come from France and France is on holiday, that contributes 0.40 to the crowd pressure score. Crowds can reduce the timing score by up to 35%, ensuring conditions still matter most.
Scores: 5 = great conditions with low crowds (the sweet spot). 4 = great conditions with moderate crowds, or good conditions with low crowds. 3 = average. 2 = below average conditions or very crowded. 1 = poor conditions or peak holiday chaos.
Last 29 days of logged conditions.
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Create Profile →Current conditions refresh every 3 hours when the cron runs. Hourly data updates every 30 minutes. The 7-day forecast, luck factor, and packing notes are all pre-computed at the same time.
We compare the 7-day forecast to the last 5 years of marine data for the same week at Mentawai Islands. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical mid-June.
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Honestly, no. Every break has tide windows, swell directions and reef contours that a global model cannot see. Treat the score as a starting point, then check a local cam.
The best week for surf at Mentawai Islands is the week of 30 November (score 3/5) with low crowds.
Next to nothing in the water. Check back tomorrow. Reasonable period putting some grunt behind each wave. Strong offshore, clean but tough to paddle into.
Heads up: thunderstorms forecast, and jellyfish: peak season.
Indicators derived from forecast data, not official warnings. Always check local lifeguard or official advice.
Crystal clear water: ~23m visibility
Daily scores over the last 12 months at Mentawai Islands