Meet the world’s biggest waves - and the mysteries behind them

This article explores the natural phenomena behind the world's largest waves, specifically focusing on the record-breaking surf at Nazaré, Portugal. It highlights the experiences of surfer Sebastian Steudtner and the scientific efforts to measure these massive water formations.
Why it matters
Understanding the mechanics of extreme waves provides critical insights for coastal safety and oceanography while documenting human athletic achievement.
Wind, weather, earthquakes and canyons can give rise to truly colossal waves
Here, off the coast of Nazaré, Portugal, on October 29, 2020, Sebastian Steudtner set a record for the tallest wave ever surfed. That wave was 26.21 meters (85.99 feet) tall.
Classroom Resources for This Article Classroom Questions Power Words Word Find Puzzle Readability Score: 6.7
The morning of October 29, 2020, was cool and clear in Nazaré. This coastal town in Portugal is famous for its beaches and vibrant nightlife. It’s also known for its waves. They’re among the largest surfable ones anywhere. Every year, surfers flock here to ride down the monsters that rise out of the sea, especially off the north end of the beach. On this day, conditions were perfect for record-breaking waves.
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