Kotka to Sillamae Sea Distance Calculator

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

Distance
200.9 nm
nautical miles
Under Sail
40 hours
at 5 knots
Under Power
20 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: 200.9 nautical miles
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This map shows the direct sea route from Kotka to Sillamae. 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 201% longer than the 67 nm direct line, its heading turning from south to east-southeast. It is an international crossing between two countries.

Sea distance
200.9 nm (372.1 km)
Direct line
66.7 nm201% longer
Great-circle bearing
159° (south-southeast)
Geographic extent
1.0° × 3.0°
Crossing
Cross-border · Same region
From
Kotka (Finland) 60.4667, 26.9667
To
Sillamae (Estonia) 59.4261, 27.7395
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn40 hours
8 kn25 hours
10 kn20 hours
12 kn17 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 Kotka to Sillamae Route

Linking Kotka and Sillamae, this multi-day coastal cross-border crossing between two major harbours sits in the Northern Europe region — a passage shaped by persistent low cloud and reduced visibility on shoulder-season passages.

The lane links Kotka (Finland) and Sillamae (Estonia), between neighbouring ports of the same region.

Navigation Tips

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

Frequently Asked Questions

How far is it from Kotka to Sillamae by sea?

Approximately 200.9 nautical miles separate Kotka and Sillamae by sea, making this a multi-day coastal leg in Northern Europe.

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

Expect about 20 hours – 40 hours for a multi-day coastal run of 200.9 nautical miles between neighbouring ports of the same region.

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

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.

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