Beaufort Scale Poster
From 29,00€
“Today we have a force 5 wind”. Fine, but what does that mean? Translation : “Hoist up sailors, we have a fresh breeze and a wind of about 20 knots”.
With this Beaufort Scale Poster, you will always have in mind the conversions between the Beaufort scale and the wind speed in Km/h and Knots.
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Forest-friendly paper


Your poster is printed on high-weight matte white paper with a natural, smooth, uncoated finish that feels luxurious to the touch. The perfect option to stand the test of time.
This paper is made from wood from sustainably and responsibly managed FSC-certified forests.
A beautiful wooden frame for your poster


Our wooden frames are sturdy, durable and ready to hang in an instant!
The frames are made from pine and are available in 3 colors: black, white and natural wood. To ensure that your poster retains all its splendor, we use unbreakable, transparent plexiglas to protect it from any impact.
Your poster is delivered already framed, ready to hang directly on the wall.
12 reviews for Beaufort Scale Poster
Created in 1805 by the British admiral Francis Beaufort (1774-1857), the Beaufort scale measures the strength of the wind in 13 degrees, from force 0 (Calm) to force 12 (Hurricane). The Beaufort degree corresponds to the sea state according to the wind speed.
Where does the Beaufort scale come from?
The Beaufort scale is a measurement scale from 0 to 12 degrees that was created empirically, by comparing the average wind speed for 10 minutes.
Originally, a beaufort degree corresponds to the sea state associated with an average wind speed and the presence of foam and spray. Of course, the degrees are less accurate than measuring the wind speed with an anemometer, but at sea it is very practical to estimate the wind speed just by observing the effects of the wind on the sea surface.
It was the British admiral Francis Beaufort who invented this scale in 1805.
Why was the Beaufort scale created?
The purpose of its creation was to help the commanders of British warships to appreciate the wind and sea conditions. At the time of the Napoleonic Wars, the English had built ships in droves and recruited many officers. Young and willing to do anything to prove their worth, these officers did not reduce sail until late in the game, which frequently resulted in broken masts, torn sails or men overboard.
The Francis Beaufort scale was accompanied by a series of instructions on how to adapt the sails to wind and sea conditions.
The degrees of the Beaufort scale
The degrees of the Beaufort Scale are as follows:
Strength 0: Calm. The sea is smooth as a mirror, without waves.
Force 1: Light air The sea has a few ripples, but they don’t make foam.
Force 2: Light breeze. There are waves, but they do not break.
Force 3: Gentle breeze Small waves of less than 1m appear, and we can see some scattered white horses
Force 4: Moderate breeze The waves can reach 2m in height, and the white horses are numerous on the water.
Force 5 : Fresh breeze The tree tops shake, the waves can reach 3m.
Force 6: Strong breeze The wind whistles, the waves are crowned with a crest of foam, the waves reach 3 to 4m.
Force 7 : High wind, moderate gale, near gale The harbourmasters advise the boats not to go out. The waves can now reach 5,5m, we observe foam trails.
Force 8 : Gale, fresh gale Walking against the wind becomes almost impossible. At the crest of the waves you can see swirls of foam, the waves reach up to 7.5 m.
Force 9 : Strong/severe gale The roof tiles are flying off, the breaking waves are now reaching 10m, and the visibility is reduced by the spray.
Force 10 : Storm, whole gale Some trees are uprooted, and the surface of the sea looks white. The waves of almost 12m break in an intense and brutal way.
Force 11 : Violent storm The visibility is still reduced and the sea is completely covered with foamy banks. The 15m high waves create impressive troughs in which small ships can be lost from sight at times.
Force 12 : Hurricane The air is saturated with foam and spray; the sea is totally white, the waves are all over 15m.
How to convert the Beaufort scale to knots?
To convert the Beaufort scale to knots, the following equation can be used: Beaufort = Knots/5 + 1
1 knot = 0.514 m/s
1 knot = 1.852 Km/h
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How long does it take to receive my order?
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Is the information on the poster verified?
We also go out into the field to interview "real people" and gather their opinions and knowledge. This was the case for the poster on butcher's cuts. Finally, we cross-reference the information we've gathered with reliable sources on the web like Wikipedia, just to make sure our information is accurate.
How are posters packed?
To ensure that your posters arrive in perfect condition, we have selected a solid, reliable packaging. The photos below are examples only, as packaging may vary from country to country.
The poster is packaged in a strong, sturdy tube. Depending on the country, the tube may be surrounded by a shipping sleeve to prevent the tube from rolling. Inside the tube, the poster is wrapped in tissue paper to prevent scratching.



What kind of paper is used?
Your poster is printed on high-weight matte white paper with a natural, smooth, uncoated finish that feels luxurious to the touch. The perfect option to stand the test of time.
This paper is made from wood from sustainably and responsibly managed FSC-certified forests.
What is your return policy?
If you're not completely satisfied with your purchase, we're here to help.
If you don't like the poster, you can return it within 14 days in its original packaging to: Frog Posters, 2 rue des Aires, 13350 Charleval, France
We will refund your money as soon as we receive it, using the same payment method you used. As we print your poster as close to you as possible, we cannot cover the cost of returns.

Beaufort Scale Poster
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13350 Charleval, France
Taylor B. –
The print and frame are very well done. And I do appreciate the attached hardware which made it so easy to hang, too.
Hannah –
Ordering was easy, kept me updated when the product was being shipped/arrived. The product was just as described and exactly what I wanted – quality beat my expectation. No surprises.
Trevor F –
Super, I love it, really nothing to say, received quickly, well protected, good quality. I recommend
Evan –
Very happy with my order
Emily G. –
I bought two prints. The paper is quality, they were Very well packaged in a cardboard envelope to prevent damage. The color saturation is excellent. Shipping was fast. Overall: A+
Ashley –
My order was sent right away and arrived very safely in a heavy carton mailer. The print was exactly as pictured online – I am very glad I ordered for such a reasonable price.
Amanda A. –
I love Frog Posters! Their prints are fun and unique. Some are quirky, others interesting/relevant, others just plain fun. I have a whole kitchen series and am now working on prints for my office.
Brittany –
Speedy delivery, easy ordering, perfect condition.
Elizabeth –
I ordered a picture frame from Frog Posters which came within a week and am really impressed with the quality of the frame. Would order again and recommend for sure
Hunter –
Quality posters, fast delivery
Paul –
Quality poster
Bryan –
2nd order on this site.
Delivery even faster than the first.
Very well packaged.