Last updated: 4 November 2026

The Strait of Malacca is the 900 km sea lane between Malaysia and Sumatra that carries more ships, and more seaborne oil, than any other chokepoint on Earth. More than 102,500 vessels passed through it in 2025. If you sail on a freighter between Europe and East Asia, you will almost certainly use it.

Where is the Strait of Malacca?

The strait runs north-west to south-east between the Malay Peninsula and the Indonesian island of Sumatra. At its northern end it opens into the Andaman Sea and the Indian Ocean. At its southern end it joins the Singapore Strait and the South China Sea.

It is the shortest sea route between the Indian Ocean and the Pacific. The alternatives, the Sunda and Lombok straits through Indonesia, add days to a voyage. That is why the strait matters to everyone from oil traders to freighter passengers.

The northern part is wide. The southern part is not. In the Singapore Strait, the Phillips Channel narrows to about 2.7 km. Depths in shallower parts are only around 25–27 metres. The largest crude carriers, with drafts over 20 metres, have little water to spare.

How busy is it? The 2025 numbers

Malaysia’s Marine Department counted more than 102,500 transits in 2025. That is roughly one ship every five minutes, day and night. Traffic has risen steadily for years.

In the first half of 2025, about 23.2 million barrels of oil a day moved through the strait. That was 29% of all seaborne oil, and more than the Strait of Hormuz carried in the same period. Analysts estimate around three-quarters of China’s seaborne crude imports pass this way.

Singapore and Port Klang: the two giants

Two of the world’s biggest container ports sit on the strait. Most freighters call at one or both.

Singapore is also the world’s largest bunkering port. Many ships stop only to refuel, so the anchorages off the island are always crowded.

Watch: why the Strait of Malacca matters

How ships are kept apart: the traffic separation scheme

With this much traffic, ships cannot sail where they like. An IMO-adopted traffic separation scheme runs through the Straits of Malacca and Singapore. Eastbound and westbound ships keep to separate lanes, like a dual carriageway at sea.

Ships also report to shore stations in Malaysia, Singapore and Indonesia under a mandatory reporting system known as STRAITREP. Deep-draught vessels must keep a minimum under-keel clearance. From a freighter bridge, you will hear constant VHF traffic as ships report their positions.

Piracy in 2025 and 2026

The Straits of Malacca and Singapore had a bad 2025. ReCAAP ISC recorded 108 incidents there, the highest total since 2007. Most were petty thefts from ships underway at night, usually without injury to crew.

2026 looks very different so far. From January to September, ReCAAP logged 23 incidents in the straits, down from 97 in the same period of 2025. Across Asia, incidents fell 58%. Increased patrols and arrests are credited for the drop.

For passengers, the practical effect is small. Crews lock doors, rig lights and post extra watches at night. You may be asked to stay inside after dark in some stretches. See our guide to cargo ship piracy for more.

Freighter routes that use the strait

Almost every Europe–Asia container loop sails this way. A typical westbound rotation runs from China or Korea to Singapore, then up the strait to Sri Lanka, through the Suez Canal and on to the Mediterranean or North Europe. Eastbound ships do the reverse.

Some loops call at Port Klang as well as Singapore. Others skip one or the other. Itineraries change often, so check the latest rotation when you book. Our cargo ship to Singapore et cargo ship to China guides cover the main options.

A full transit of the strait takes roughly a day and a half at normal service speed, depending on traffic and port calls. Expect to see ships on every horizon.

Watch: the strait and world trade

The Kra canal and Thailand’s Land Bridge

For centuries people have proposed cutting a canal across Thailand’s narrow Kra Isthmus to bypass the strait. No canal has ever been built.

Thailand’s current plan is a “Land Bridge” instead. It would link new deep-sea ports at Ranong on the Andaman coast and Chumphon on the Gulf of Thailand, about 90 km apart, by rail and road. The estimated cost is around 1 trillion baht (about US$30 billion). In mid-2026 the project was still under review, with a new environmental assessment ordered and investors cautious. Shipping lines would have to unload and reload cargo, which is why many analysts doubt it will draw traffic away from the strait.

Malacca city: the town that named the strait

The historic port of Melaka (Malacca) sits on the Malaysian shore, around two hours’ drive south of Kuala Lumpur. Portuguese, Dutch and British powers all held it. Its old centre is a UNESCO World Heritage Site, shared with George Town in Penang.

Container ships do not call at Malacca city. If you leave a freighter at Port Klang or Singapore, it makes an easy side trip by road.

Strait of Malacca compared with other chokepoints

Read more in our Strait of Gibraltar shipping guide. The best weather for a transit is usually during the inter-monsoon months, though the strait is sheltered and sailable all year.

Tips

1. Ask the captain if you may visit the bridge during the Singapore Strait passage. It is the busiest part.
2. Bring binoculars. You will see tankers, car carriers, bulkers and fishing boats at close range.
3. Respect night-time security rules. Doors may be locked and decks closed after dark.
4. Expect haze between roughly June and October, when Sumatran fires can reduce visibility.
5. Have a plan for Singapore or Port Klang. Port stays can be short, and shore leave is never guaranteed.
6. Check your visa rules for Malaysia, Singapore and any other country on the rotation before you sail.

Foire aux questions

Sources: Reuters (April 2026), Malaysian Marine Department, CSIS, Vortexa, ReCAAP ISC Annual Report 2025 and January–September 2026 data, Maritime and Port Authority of Singapore, Port Klang Authority / Malay Mail, Reuters on Thailand’s Land Bridge (June 2026). Checked November 2026.