Simeulue is an island off the western coast of Sumatra, Indonesia, featuring numerous high-quality reef breaks, with 'The Peak' being the most prominent. The underlying bathymetry consists of a highly structured, relatively flat coral and rock reef shelf that dictates the wave's flawless peeling mechanics.
Forecast accuracy at Simeulue
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Best time to go
quiet evening session, conditions building through the session
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7-day forecastRecent form
Last 14 days of logged conditions.
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Create Profile →Frequently asked questions
How often is this page updated?
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.
What is the luck factor?
We compare the 7-day forecast to the last 5 years of marine data for the same week at Simeulue. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical early May.
How is 'best session' picked?
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Where does the data come from?
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Does the score capture local knowledge?
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.
When is the best time to surf Simeulue?
Check our timing score heatmap above for a week-by-week breakdown combining surf conditions with crowd pressure.