San Francisco marine weather forecast
San Francisco (USSFO) is a port in United States at 37°49.0′N 122°25.0′W. Today (Sep 13): WSW wind 1–7 kn, waves 1.7–1.7 m, from the ECMWF IFS run 2026-09-13 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 | 37°49.0′N 122°25.0′W |
|---|
| UN/LOCODE | USSFO |
|---|
| Harbor size | Large |
|---|
| Harbor type | Coastal natural harbor |
|---|
| Shelter | Excellent |
|---|
| Channel depth | 9 m |
|---|
| Anchorage depth | 8 m |
|---|
| Tide range | 1 m |
|---|
| Pilotage | Compulsory |
|---|
| Time zone | America/Los_Angeles |
|---|
Facilities & services (NGA World Port Index)| Tugs | Assistance and salvage available |
|---|
| Supplies | Fuel oil, diesel, water, provisions |
|---|
| Repairs | Major (hull, machinery, electrical) |
|---|
| Medical facilities | Available |
|---|
10-day marine forecast — San Francisco
| Date | Wind | Gusts | Waves |
|---|
| WSW 1–7 kn | 19 kn | 1.7–1.7 m |
|---|
| S 1–7 kn | 18 kn | 1.9–2.9 m |
|---|
| SW 2–7 kn | 17 kn | 2.8–3.2 m |
|---|
| WSW 3–6 kn | 17 kn | 2.6–2.6 m |
|---|
| SW 1–7 kn | 19 kn | 2.0–2.5 m |
|---|
| SSW 1–7 kn | 9 kn | 1.7–1.9 m |
|---|
| SW 2–6 kn | 8 kn | 1.9–2.4 m |
|---|
| S 1–1 kn | 4 kn | 2.8–2.8 m |
|---|
| SE 1–1 kn | 5 kn | 1.9–1.9 m |
|---|
| SSW 2–2 kn | 7 kn | 1.7–1.7 m |
|---|
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.
What to watch in the forecast
Across the loaded 10-day outlook, the strongest daily modeled wind reaches 7 kn on Sep 13. The highest modeled significant wave height is 3.2 m on Sep 15. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at San Francisco right now?
As of the ECMWF IFS run 2026-09-13 12z: WSW wind 1–7 kn, waves 1.7–1.7 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 Francisco?
San Francisco is classed as a large harbor (coastal natural harbor), with excellent shelter in the NGA World Port Index.
How deep is the approach to San Francisco?
Per the NGA World Port Index, the entrance channel carries about 9 m and anchorage depths run about 8 m. Verify against current official charts before entry.
What restricts entry to San Francisco?
Entry is affected by overhead clearance limits. Check the live forecast on this page and official notices before approach.