San Juan De La Costa (MXSJC) — marine weather & port guide
San Juan De La Costa is a port in Mexico at 24°24.0′N 110°42.0′W. Today (Aug 3): SSW wind 9–19 kn, waves 0.7–1.1 m, from the ECMWF IFS run 2026-08-03 12z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 24°24.0′N 110°42.0′W |
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| UN/LOCODE | MXSJC |
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| Harbor size | Very small |
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| Harbor type | Open roadstead |
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| Shelter | Poor |
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| Tide range | 2 m |
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| Pilotage | Compulsory |
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| Time zone | America/Mazatlan |
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10-day marine forecast — San Juan De La Costa
| Date | Wind | Gusts | Waves |
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| SSW 9–19 kn | 23 kn | 0.7–1.1 m |
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| S 6–19 kn | 27 kn | 0.7–1.3 m |
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| SSW 8–11 kn | 17 kn | 0.5–0.7 m |
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| S 2–12 kn | 16 kn | 0.5–0.6 m |
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| SSE 6–12 kn | 15 kn | 0.4–0.6 m |
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| SSE 5–10 kn | 12 kn | 0.4–0.5 m |
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| SSE 8–11 kn | 14 kn | 0.6–0.8 m |
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| SSW 7–7 kn | 16 kn | 0.6–0.6 m |
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| SE 5–5 kn | 15 kn | 0.6–0.6 m |
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| SSE 7–7 kn | 11 kn | 0.4–0.4 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 is the weather at San Juan De La Costa right now?
As of the ECMWF IFS run 2026-08-03 12z: SSW wind 9–19 kn, waves 0.7–1.1 m. The 10-day outlook is in the forecast table on this page and updates with each model cycle.
How big is the harbor at San Juan De La Costa?
San Juan De La Costa is classed as a very small harbor (open roadstead), with poor shelter in the NGA World Port Index.