Stockholm to Kotka Sea Distance Calculator

Calculate the exact nautical distance from Stockholm, Sweden to Kotka, Finland. Plan your maritime journey with our professional route calculator.

Distance: 319.6 nm; nautical miles
Under Sail: 2.7 days; at 5 knots
Under Power: 32 hours; at 10 knots
Best Time: May-September; Typical Sailing Season

Distance follows a sea-lane route. Sailing times are estimates at fixed cruising speeds and vary with vessel, weather, and currents.

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Distance: 319.6 nautical miles

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This map shows the direct sea route from Stockholm to Kotka. The actual sailing path may vary based on weather conditions and navigation requirements.

Passage details

This is a moderately indirect coastal passage: the navigable route runs 16% longer than the 276 nm direct line, its heading turning from east-northeast to north. It is an international crossing between two countries.

Sea distance: 319.6 nm (591.9 km)
Direct line: 276.3 nm16% longer
Great-circle bearing: 72° (east-northeast)
Geographic extent: 1.2° × 9.1°
Crossing: Cross-border · Same region
From: Stockholm (Sweden) 59.3293, 18.0686
To: Kotka (Finland) 60.4667, 26.9667
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	2.7 days
8 kn	40 hours
10 kn	32 hours
12 kn	27 hours

Distance follows a sea-lane route generated from marine traffic lanes; passage times are computed at fixed cruising speeds.

Read the methodology — How we calculate sea distances

Last reviewed 2026-06-17

About Stockholm to Kotka Route

The maritime route from Stockholm to Kotka is a overnight offshore cross-border passage between two major harbours in the Northern Europe region. Mariners on this leg typically prepare for North Sea gales and short steep seas in winter.

This route runs between neighbouring ports of the same region, connecting Stockholm in Sweden with Kotka in Finland.

Navigation Tips

•On this overnight offshore cross-border crossing in the Northern Europe region, prepare for North Sea gales and short steep seas in winter, particularly in peak season.
•For a overnight offshore route, plan fuel and provisioning around the Northern Europe region — calculate consumption with our tool.
•Verify port-entry requirements at both ends of this cross-border route between neighbouring ports of the same region before you depart.
•Check safety gear suited to Northern Europe conditions before a overnight offshore passage — life rafts, EPIRB, and current charts.
•Carry passports, vessel documents, and crew lists matched to this cross-border route between neighbouring ports of the same region.

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Frequently Asked Questions

How far is it from Stockholm to Kotka by sea?

The sea distance from Stockholm to Kotka is approximately 319.6 nautical miles — a overnight offshore passage in Northern Europe.

How long does it take to sail from Stockholm to Kotka?

A overnight offshore between neighbouring ports of the same region crossing of 319.6 nautical miles typically takes 1.3 days – 2.7 days, depending on vessel and weather.

What's the best time to sail from Stockholm to Kotka?

The best time for this route in Northern Europe is May-September, when conditions are most favourable; expect North Sea gales and short steep seas in winter outside that window.

Plan Your Perfect Maritime Journey

Use our advanced calculator above to customize your route, add waypoints, calculate fuel costs, and share your journey plan with crew members.

Plan another route with our Sea Distance Calculator Navigation Guide