San Francisco to San Diego — sea route & marine weather
The sea route from San Francisco (USSFO) to San Diego (USSAN) is about 476 nm — about 48 hours at 10 kn. Along the route today (Aug 3): W wind 0–13 kn, waves 1.1–3.5 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 476 nm |
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| Passage time at 10 kn | about 48 hours |
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| Great-circle distance | 401 nm |
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| San Francisco | 37°49.0′N 122°25.0′W |
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| San Diego | 32°42.0′N 117°9.0′W |
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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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| W 0–13 kn | 18 kn | 1.1–3.5 m |
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| WNW 0–12 kn | 15 kn | 1.0–2.9 m |
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| NW 0–8 kn | 17 kn | 0.8–2.1 m |
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| WNW 0–9 kn | 17 kn | 0.8–1.5 m |
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| NW 0–10 kn | 17 kn | 0.7–1.4 m |
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| S 0–14 kn | 17 kn | 0.8–1.6 m |
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| SW 1–14 kn | 18 kn | 0.9–3.0 m |
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| S 1–15 kn | 19 kn | 0.9–3.2 m |
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| W 1–9 kn | 16 kn | 1.0–2.9 m |
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| W 0–10 kn | 16 kn | 1.0–3.1 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 San Francisco to San Diego by sea?
The water route is 476 nm (882 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from San Diego to San Francisco.
How long does the passage from San Francisco to San Diego take?
about 48 hours 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 San Francisco and San Diego today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: W wind 0–13 kn, waves 1.1–3.5 m. The day-by-day table on this page covers the next 10 days.