Tallinn to Kotka Sea Distance Calculator

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

Distance: 127.2 nm; nautical miles
Under Sail: 25 hours; at 5 knots
Under Power: 13 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.

Interactive Route Map

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Distance: 127.2 nautical miles

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

Passage details

This is a markedly indirect coastal passage: the navigable route runs 40% longer than the 91 nm direct line, holding a steady north course. It is an international crossing between two countries.

Sea distance: 127.2 nm (235.7 km)
Direct line: 90.8 nm40% longer
Great-circle bearing: 46° (northeast)
Geographic extent: 1.0° × 2.4°
Crossing: Cross-border · Same region
From: Tallinn (Estonia) 59.4370, 24.7536
To: Kotka (Finland) 60.4667, 26.9667
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	25 hours
8 kn	16 hours
10 kn	13 hours
12 kn	11 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 Tallinn to Kotka Route

Linking Tallinn and Kotka, this single-day crossing international crossing connecting two major commercial ports sits in the Northern Europe region — a passage shaped by persistent low cloud and reduced visibility on shoulder-season passages.

The lane links Tallinn (Estonia) and Kotka (Finland), within the same maritime region.

Navigation Tips

•A single-day crossing international passage in the Northern Europe region typically requires planning for persistent low cloud and reduced visibility on shoulder-season passages.
•A single-day crossing leg in Northern Europe benefits from waypoint planning and verified fuel availability.
•Confirm operating hours and clearance procedures for this international crossing within the same maritime region, since rules vary by port.
•Verify that emergency equipment matches the demands of a single-day crossing leg in Northern Europe.
•Documentation requirements differ for international passages within the same maritime region; verify cruising permits in advance.

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Frequently Asked Questions

How far is it from Tallinn to Kotka by sea?

Approximately 127.2 nautical miles separate Tallinn and Kotka by sea, making this a single-day crossing leg in Northern Europe.

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

Expect about 13 hours – 25 hours for a single-day crossing run of 127.2 nautical miles within the same maritime region.

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

Peak sailing season here is May-September; year-round, Northern Europe routes contend with persistent low cloud and reduced visibility on shoulder-season passages.

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