SEA-ME-WE 5: The Internet Highway Between Asia and Europe
Cable profile based on GeoCables monitoring data — 180 health checks recorded
SEA-ME-WE 5 (South East Asia–Middle East–Western Europe 5) stands as one of the most strategically vital submarine cables globally. Spanning 20,000km from Singapore to France, it facilitates a significant share of internet traffic between Asia and Europe — two of the world's largest economic powerhouses. GeoCables has conducted 180 health checks on this cable, underscoring its importance within our monitoring portfolio.
The Route: Singapore to Marseille in 18 Hops
SEA-ME-WE 5 mirrors the historic maritime Silk Road, transforming a centuries-old trade route into a modern digital highway. Its path includes: Singapore → Malaysia (Mersing) → Myanmar (Pyapon) → Bangladesh (Cox's Bazar) → Sri Lanka (Colombo) → India (Mumbai) → Pakistan (Karachi) → Oman (Salalah) → UAE (<a href="/location/fujairah-united-arab-emirates">Fujairah</a>) → Saudi Arabia (Jeddah) → Djibouti → Yemen (Al Hudaydah) → Egypt (<a href="/location/zafarana-egypt">Zafarana</a>) → Turkey (Marmaris) → Italy (Palermo) → France (Marseille)With 18 landing points across 16 countries, the cable navigates critical maritime zones including the Strait of Malacca, the Bay of Bengal, the Arabian Sea, the Red Sea, the Suez Canal approaches, and the Mediterranean.
The Chokepoints
SEA-ME-WE 5 traverses three of the world's most critical maritime chokepoints, making its route both essential and vulnerable:1. Strait of Malacca (Singapore/Malaysia): At its narrowest, this passage is just 2.8km wide. It handles over 25% of global trade and supports a substantial portion of Asia-Europe submarine cable traffic. Multiple cables operate within this corridor.
2. The Red Sea / Bab-el-Mandeb Strait: In late 2023 and 2024, Houthi attacks on shipping in the Red Sea raised concerns about submarine cable security. Early 2024 saw several cables in this region sustain damage, leading to observable increases in Asia-Europe latency.
3. Suez Canal approaches: Egypt's strategic location as the gateway between the Red Sea and the Mediterranean makes it indispensable for Asia-Europe cable routing. At least 17 major submarine cables pass through Egyptian waters.
Capacity and Technology
SEA-ME-WE 5 employs 100 Gbps wavelength technology with a design capacity of approximately 24 Tbps. When it entered service in 2016, this represented cutting-edge technology. Today, it is complemented by its successor, SEA-ME-WE 6 (19,200km, 100+ Tbps design capacity), which follows a similar route with advanced technological upgrades.GeoCables Monitoring Results
GeoCables' 180 health checks on SEA-ME-WE 5 provide detailed insights into its performance across key segments:- Singapore → Oman (Salalah): ~80ms — consistent with the 6,400km Indian Ocean segment.
- Oman → Egypt: ~30ms — reflecting the Red Sea transit.
- Egypt → France (Marseille): ~45ms — covering the Mediterranean crossing.
The total theoretical minimum propagation time from Singapore to Marseille is approximately 100ms. Real-world round-trip times (RTT), accounting for routing overhead, range between 120–140ms.
Why SEA-ME-WE 5 Matters for Your Connection
For users in Southeast Asia accessing European servers, or Europeans connecting to Asian services, SEA-ME-WE 5 plays a pivotal role. It is one of approximately six cables serving the Asia-Europe corridor, alongside AAE-1, FLAG <a href="/cable/fea">FEA</a>, SEA-ME-WE 4/6, and <a href="/cable/peace-cable">PEACE Cable</a>.Any disruption to SEA-ME-WE 5 — as has occurred in the Red Sea and Egyptian coastal waters — can lead to measurable latency increases for hundreds of millions of users simultaneously.
GeoCables actively monitors SEA-ME-WE 5 with 180 recorded health checks. View real-time status →
