How far you're going, and how fast you expect to make good.
Speed through the water only — it says nothing about current, and along the Adriatic islands a channel can run a knot or more against you. A passage planned at 5 kn is the usual cruising-yacht guess.
Type into either field — the other one converts instantly.
One nautical mile is exactly 1.852 km — the length of one minute of latitude.
Type into either field — the other one converts instantly.
One foot is exactly 0.3048 m. Boats are advertised in feet, while Adriatic berths and price lists are usually quoted per meter of length — so it pays to know both.
Type into any field — the other two convert instantly.
A knot is one nautical mile per hour, i.e. exactly 1.852 km/h. Croatian forecasts (meteo.hr) publish wind in m/s, while charts and boat instruments read in knots — a handy rule of thumb is 1 m/s ≈ 2 knots.
Type a speed above and its row lights up here.
| Bf | Description | m/s | Knots | At sea |
|---|---|---|---|---|
| 0 | Calm | < 0.3 | < 1 | Sea like a mirror. |
| 1 | Light air | 0.3–1.8 | 1–3 | Ripples, no foam crests. |
| 2 | Light breeze | 1.9–3.3 | 4–6 | Small wavelets with glassy crests. |
| 3 | Gentle breeze | 3.4–5.4 | 7–10 | Large wavelets, crests begin to break. |
| 4 | Moderate breeze | 5.5–8.4 | 11–16 | Small waves, frequent whitecaps. |
| 5 | Fresh breeze | 8.5–11.0 | 17–21 | Moderate waves, many whitecaps, some spray. |
| 6 | Strong breeze | 11.1–14.1 | 22–27 | Large waves, foam crests everywhere, spray. |
| 7 | Near gale | 14.2–17.2 | 28–33 | Sea heaps up, foam blown in streaks. |
| 8 | Gale | 17.3–20.8 | 34–40 | Moderately high waves, crests break into spindrift. |
| 9 | Strong gale | 20.9–24.4 | 41–47 | High waves, dense foam, spray hurts visibility. |
| 10 | Storm | 24.5–28.5 | 48–55 | Very high waves with overhanging crests, sea looks white. |
| 11 | Violent storm | 28.6–32.6 | 56–63 | Exceptionally high waves, sea completely covered in foam. |
| 12 | Hurricane | ≥ 32.7 | 64+ | Air filled with foam and spray, visibility gone. |
Croatian forecasts publish wind speed in m/s but describe it in Beaufort — “bura 6 to 8” means force, not knots. Note that the wave heights behind the scale assume open ocean: the Adriatic is narrow, so the same force builds a shorter, steeper sea here. For the forecast sea state see the Douglas scale on the sea page, and for what each Adriatic wind does see Adriatic winds. The scale is defined in knots, so the knot column decides the force here (rounded to whole knots, the way an instrument reads) and the m/s column is those same bands converted — which puts it up to half a m/s off the rounded m/s ranges other tables print.