> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sunnymeteo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Wind speed & Beaufort scale

> Beaufort force vs wind speed reference

City weather APIs use Beaufort force for `wind_level` / `gust_level`; `wind_speed` is in **m/s**.

## Beaufort scale (common)

| Force | Name | Wind speed (m/s) | Wind speed (km/h) |
| - | - | - | - |
| 0 | Calm | 0.0–0.2 | \< 1 |
| 1 | Light air | 0.3–1.5 | 1–5 |
| 2 | Light breeze | 1.6–3.3 | 6–11 |
| 3 | Gentle breeze | 3.4–5.4 | 12–19 |
| 4 | Moderate breeze | 5.5–7.9 | 20–28 |
| 5 | Fresh breeze | 8.0–10.7 | 29–38 |
| 6 | Strong breeze | 10.8–13.8 | 39–49 |
| 7 | Near gale | 13.9–17.1 | 50–61 |
| 8 | Gale | 17.2–20.7 | 62–74 |
| 9 | Strong gale | 20.8–24.4 | 75–88 |
| 10 | Storm | 24.5–28.4 | 89–102 |
| 11 | Violent storm | 28.5–32.6 | 103–117 |
| 12 | Hurricane | ≥ 32.7 | ≥ 118 |

Station forecast wind fields are returned directly in **m/s** (`wind_speed_10m`, etc.) without a separate Beaufort level.


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