Sea distance from Mombasa to Sydney
The sea route from Mombasa (Kenya) to Sydney (Australia) is about 6,733 nautical miles, which is 12,469 km or 7,748 statute miles. That is about 6% longer than the direct great-circle line, because the practical route follows coastlines and shipping lanes.
Voyage time by boat speed
Time underway is distance divided by speed. These are continuous-passage figures with no stops or weather margin.
| Boat and speed | Time underway |
|---|---|
| Sailboat, conservative (5 kn) | 56d 3h |
| Sailboat, average (6 kn) | 46d 18h |
| Displacement trawler (8 kn) | 35d 2h |
| Fast trawler (10 kn) | 28d 1h |
| Planing motor yacht (15 kn) | 18d 17h |
| Fast motor yacht (20 kn) | 14d 1h |
Planning estimate, not navigation
This distance is computed over the open Eurostat shipping-lane network. It is a realistic passage length for planning, but your sailed distance will differ with weather routing, currents, draft, and the exact berths you leave from and arrive at. Always verify against official charts.
Building with these numbers? The sea route & distance API returns this figure, voyage time, and route geometry for any port pair in one GET request.
Plan this passage properly
Open Mombasa to Sydney in the Marine OS route planner: it suggests the sea route, then you drag waypoints, set your speed and fuel burn, and check weather and tides along the way.
Open this route in the plannerFrequently asked questions
How far is Sydney from Mombasa by sea?
About 6,733 nautical miles (12,469 km / 7,748 statute miles) along the practical sea route. The straight-line distance is shorter, but boats follow coastlines, channels, and traffic lanes.
How long does it take to sail from Mombasa to Sydney?
At a typical sailing average of 6 knots it is about 46d 18h underway. A 10-knot trawler needs about 28d 1h, and a 20-knot motor yacht about 14d 1h. Add margin for weather, currents, and stops.
How is this distance calculated?
It is computed over the open Eurostat global shipping-lane network, the same kind of network freight routing tools use. It is a realistic planning estimate, not a navigation product: your sailed distance will vary with weather routing, draft, and the exact harbors you use.
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