The Surf Window

Hollow Trees

Mentawais, Indonesia

Reef breakExpert

The Mentawais' most iconic left, a thick, cavern-like barrel that locks in over a shallow reef, producing some of the longest and most perfect tubes anywhere on earth.

Typical Conditions

The Surf Window

Swell Window

N
OptimalW (270°)
WindowSSW–NNW (210°–330°)
Size4-8ft

Wind

SE

Offshore

Tide

Mid to high

LowMidHigh

Season

May–September

JFMAMJJASOND

The Wave

Type

Left

Bottom

Very shallow coral reef

Shape

Thick, sucking barrel, the definition of a perfect left

Length

100–200m (barrel can last 5–15 seconds)

Skill Level

  • Who it's for: Expert
  • Why: The wave throws hard, the reef is inches below, and the take-off zone is brutally unforgiving.

Hazards

  • Extremely shallow reef
  • Remote, hours from medical care
  • Powerful hold-downs on wipeouts
  • Can be crowded given its fame on the charter circuit

Local Tips

  • Time your take-off from deep, the wave sucks the water off the reef, look more accessible than it is.
  • Watch several sets from the boat before paddling out to understand the current and the best take-off spot.

Location

Map showing the location of Hollow Trees in Mentawais, Indonesia

-2.5167, 99.8167