Bankvaults Mentawai wave guide and safety tips

Where is Bank Vaults in the Mentawai Islands?

Bank Vaults breaks off the southern tip of Masokut, also called Nyang Nyang, in the Playgrounds: the cluster of small islands between southern Siberut and northern Sipora, off the west coast of Sumatra. It is not on Sipora. Pitstops, E-Bay and Beng Bengs are nearby on Masokut, and Rifles and Kandui Left are on neighbouring Karangmajat. See the Nyang Nyang Mentawai surf guide.

What swell and tide does Bank Vaults need?

Bank Vaults is exposed to south and southwest groundswell, the swells that drive the Mentawai season from April to October. It is one of the waves in the area that keeps working as the swell gets very big, which is why charter boats head there on large days. It can break on most tides, but low tide on a big swell is the most dangerous combination, and the best tide changes with swell size.

Wave characteristics

• Type: right-hand reef break
• Best swell: south to southwest groundswell; handles large swells
• Tide: varies with swell size; avoid low tide on big days
• Character: thick, square, heavy barrel
• Level: advanced to expert

How do you get to Bank Vaults?

Fly into Padang (PDG), then take the Mentawai Fast ferry to Tua Pejat on Sipora or Maileppet on Siberut, roughly 3.5 to 4.5 hours on a direct sailing. From there, Playgrounds resorts and camps collect guests by speedboat and run boat trips to the wave. Charter boats from Padang include Bank Vaults on northern routes. See how to get to Mentawai surf resorts.

Transport options

• Fast ferry to Tua Pejat or Maileppet, then a resort speedboat
• Slow overnight ferry, about 10 to 12 hours, then a speedboat
• A surf charter boat that includes the Playgrounds on its route

Where can you stay near Bank Vaults?

• Playgrounds resorts: land resorts on the small islands and southern Siberut include meals, boat trips and guiding. See the Siberut surf resort guide.
• Surf camps: shared, simpler options; see the Mentawai surf camp guide.
• Charter boats: follow the swell between reefs; see Mentawai surf tours compared.

How do you stay safe surfing Bank Vaults?

General precautions

• Surf with others and let the boat crew know where you are.
• Check the forecast and tide before you go; our guide to reading the Mentawai surf forecast explains swell period and direction.
• Use a strong leash and a rash vest or thin top; the water is 27 to 29 °C, so a wetsuit is not needed.

Understanding the reef

• The reef is shallow and sharp; know the tide so you are not caught on the inside at low water.
• Reef booties are optional, but treat every cut the same day.
• Keep clear of other surfers and boats in the channel.

What health and permit rules apply?

Health

See a travel-medicine clinician several weeks before you go. They may discuss routine vaccinations such as hepatitis A and tetanus, and malaria advice for rural Sumatra. Carry a first-aid kit and insurance that covers surfing and medical evacuation; our guide to Mentawai surf safety has more.

Surf levy

The Mentawai regency charges foreign surfers a levy of IDR 2,000,000 per surfer for each 15-day period, set by regency regulation since February 2024. Many resorts and charters collect it; check the current amount when you book.

When is the best time to surf Bank Vaults?

The season spans April to October, and the best conditions are typically from June to September, when the biggest groundswells arrive.

Month by month

• April: the season starts; swells are often smaller and Bank Vaults may be too small to break well.
• May: swells build and the trade winds settle in.
• June to September: the peak, with the most consistent and powerful swells.
• October: the season tails off, but good swells can still arrive.

Tips for planning a Bank Vaults trip

• Book early for June to August, when the best-placed resorts and boats fill.
• Choose a base with options: Bank Vaults needs swell, and softer reefs nearby keep you surfing on small days.
• Respect the line-up: take turns, give way to local surfers and thank your guides and boat crew.

Frequently asked questions

Is Bank Vaults a left or a right?

A right. It is a thick, heavy right-hand reef break.

Is Bank Vaults on Sipora?

No. It breaks off the southern tip of Masokut (Nyang Nyang) in the Playgrounds, north of Sipora.

What swell direction does Bank Vaults need?

South to southwest groundswell, the main swell direction of the Mentawai season.

Can intermediate surfers surf Bank Vaults?

Generally no. It is an advanced to expert wave. Intermediates staying nearby do better at Pitstops, E-Bay or Beng Bengs.

Is there a softer wave near Bank Vaults?

Yes. Nipussi, a right nearby, is often described as the lighter alternative, and the Masokut reefs are close by boat.

Keep planning

For the wider area read the Playgrounds surf guide, and compare the heavy waves in the best Mentawai waves for advanced surfers. To see what a typical stay includes, visit our Mentawai surf packages page.