Riga to Sillamae Sea Distance Calculator

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

Distance: 367.1 nm; nautical miles
Under Sail: 3.1 days; at 5 knots
Under Power: 37 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: 367.1 nautical miles

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This map shows the direct sea route from Riga 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 95% longer than the 188 nm direct line, its heading turning from north-northwest to east-southeast. It is an international crossing between two countries.

Sea distance: 367.1 nm (679.9 km)
Direct line: 187.9 nm95% longer
Great-circle bearing: 36° (northeast)
Geographic extent: 2.9° × 5.1°
Crossing: Cross-border · Same region
From: Riga (Latvia) 56.9496, 24.1052
To: Sillamae (Estonia) 59.4261, 27.7395
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	3.1 days
8 kn	46 hours
10 kn	37 hours
12 kn	31 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 Riga to Sillamae Route

A medium ocean international sea route between Riga and Sillamae, this passage connecting two major commercial ports in the Northern Europe region demands attention to tidal streams and seasonal ice in the higher latitudes.

The corridor within the same maritime region joins Riga, Latvia to Sillamae, Estonia.

Navigation Tips

•Plan this medium ocean international leg in the Northern Europe region with attention to tidal streams and seasonal ice in the higher latitudes.
•Provisioning for this medium ocean passage in Northern Europe should account for regional supply networks.
•Allow time for entry formalities on this international leg within the same maritime region.
•Adapt safety equipment to Northern Europe conditions for this medium ocean crossing.
•For a international crossing within the same maritime region, ensure clearance papers and visas are in order before departure.

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Frequently Asked Questions

How far is it from Riga to Sillamae by sea?

This is a medium ocean sea passage of about 367.1 nautical miles between Riga and Sillamae in Northern Europe.

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

Average voyage time on this medium ocean within the same maritime region leg of 367.1 nautical miles is 1.5 days – 3.1 days.

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

Aim for May-September for the calmest passage in Northern Europe; off-peak periods bring tidal streams and seasonal ice in the higher latitudes.

Plan Your Perfect Maritime Journey

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Plan another route with our Sea Distance Calculator Navigation Guide