Lokalahti, Finland

Lokalahti, Finland: Submarine Cable Landing Point

Lokalahti is a village in the Finland Proper region of southwestern Finland, historically part of the former Turku and Pori Province and now administratively part of Uusikaupunki. Situated on Finland's western coastline, it serves as a submarine cable landing point connecting Finland and Sweden across the Baltic Sea corridor. Two submarine cables land at Lokalahti, making it a modest but notable node in Finland's broader submarine cable infrastructure.

The two cables landing at Lokalahti both link Finland directly to Sweden, establishing a dedicated bilateral corridor between the two countries. This regional connectivity positions Lokalahti as a point of cross-Baltic integration, complementing the wider network of Finnish landing points that collectively serve intercontinental and regional routes.

Cables Landing at Lokalahti

STO-HEL-One is a 560-kilometre submarine cable with a ready-for-service (RFS) date of 2008, currently listed as draft status. The cable connects Finland and Sweden, providing a direct link between the two countries across the Baltic Sea. Lokalahti is one of its Finnish termination points.

Mjolner West is a 250-kilometre submarine cable with a planned RFS date of 2027, also listed as draft status. Like STO-HEL-One, it connects Finland and Sweden, further reinforcing the bilateral submarine cable relationship between the two countries on this corridor. Its shorter length reflects a more direct routing across this section of the Baltic.

Regional Context

Among Finland's eleven submarine cable landing points, Lokalahti ranks within the top 82 percent by cable count, hosting two cables. This places it ahead of single-cable landing points such as Hamnäs and Haradsholm, and on par with Espoo and Kotka, though it remains well behind the dominant hub at Helsinki, which hosts ten cables, and Hanko, which hosts four. Lokalahti's two-cable presence gives it a defined, if specialised, role in the national landing point landscape.

Network Role

Lokalahti functions as a focused bilateral terminus rather than a broad multi-corridor hub. Both of its cables — STO-HEL-One and Mjolner West — connect exclusively to Sweden, meaning the landing point's entire submarine cable capacity is directed at reinforcing the Finland–Sweden link across the Baltic Sea. The addition of Mjolner West, expected to be ready for service in 2027, will double the number of cable systems available at this location and strengthen route redundancy on this specific cross-Baltic segment.

Within Finland's submarine cable graph, which spans fifteen cables across eleven landing points, Lokalahti represents a geographically distinct western access point for Sweden-bound connectivity — a role that differentiates it from Finland's larger and more diversified hubs.