Yokohama to Ishikari Bay New Port — sea route & marine weather
The sea route from Yokohama (JPYOK) to Ishikari Bay New Port (JPISI) is about 765 nm — about 3 days at 10 kn. Along the route today (Aug 3): NE wind 2–26 kn, waves 0.6–4.0 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 765 nm |
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| Passage time at 10 kn | about 3 days |
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| Great-circle distance | 472 nm |
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| Yokohama | 35°27.0′N 139°35.0′E |
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| Ishikari Bay New Port | 43°13.0′N 141°17.0′E |
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| Reference vessel | 4.5 m draft, 10 kn cruise |
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10-day marine forecast — along the route
| Date | Wind | Gusts | Waves |
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| NE 2–26 kn | 34 kn | 0.6–4.0 m |
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| NE 2–25 kn | 33 kn | 0.8–4.1 m |
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| ENE 2–22 kn | 31 kn | 0.8–3.6 m |
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| E 2–15 kn | 20 kn | 0.8–2.7 m |
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| SSE 2–23 kn | 29 kn | 1.0–2.3 m |
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| ESE 1–19 kn | 24 kn | 1.5–2.4 m |
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| NNE 4–19 kn | 23 kn | 1.2–2.8 m |
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| ENE 6–23 kn | 33 kn | 1.1–3.9 m |
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| S 3–27 kn | 42 kn | 1.8–3.3 m |
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| ENE 1–15 kn | 24 kn | 1.3–1.5 m |
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Forecast from the ECMWF IFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
Frequently asked
How far is it from Yokohama to Ishikari Bay New Port by sea?
The water route is 765 nm (1,416 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Ishikari Bay New Port to Yokohama.
How long does the passage from Yokohama to Ishikari Bay New Port take?
about 3 days at a 10 kn cruise. Scale by your own speed: at half the speed it takes about twice as long. The planner on this page recalculates for your vessel and live weather.
What is the weather between Yokohama and Ishikari Bay New Port today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: NE wind 2–26 kn, waves 0.6–4.0 m. The day-by-day table on this page covers the next 10 days.