API · /beaufort-api

Beaufort Wind Scale API

healthy 3,279 Subscribers

The Beaufort wind scale as an API, computed locally and deterministically. The classify endpoint turns a measured wind speed — in metres per second, kilometres per hour, knots, miles per hour or feet per second — into its Beaufort force (0 calm to 12 hurricane), with the descriptive name (light breeze, gale, storm …), the corresponding sea state and the mean open-sea wave height, plus the speed expressed in every unit. The force endpoint looks up a Beaufort number and returns its wind-speed range in all units, its description, sea condition and wave height. The convert endpoint converts a wind speed across metres per second, kilometres per hour, knots, miles per hour and feet per second and reports the matching Beaufort force (1 knot = 0.514444 m/s). Speeds use the standard 10-metre reference height and wave heights are open-sea means. Everything is computed locally and deterministically, so it is instant and private. Ideal for sailing, marine, aviation, drone, weather and outdoor app developers, wind-warning and sea-state tools, and meteorology education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the Beaufort wind scale; for the feels-like wind chill use a feels-like API and for live wind observations a weather data API.

#beaufort #wind #marine #sailing #meteorology #developer-tools

api.oanor.com/beaufort-api

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Machine-readable spec so AI agents can integrate this API.

/api/beaufort-api/openapi.json

/api/beaufort-api/llms.txt

Discovery: GET /api/index.json lists every API.

Beaufort Wind Scale API — live data on the oanor API marketplace

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 78 ms; Server probes · 24h
Subscribers: 3,279; active
Total calls: 76; last 7 days

Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

4,500 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
4,500 calls/month
2 req/sec
Classify + force + convert
No credit card

Starter

€4.00 /month

48,000 calls / month
6 requests / second
Hard cap (429 above quota, no overage)
48,000 calls/month
6 req/sec
Sea state, wave height, all units
Email support

Pro

€12.00 /month

230,000 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
230,000 calls/month
15 req/sec
Sailing & marine-app pipelines
Priority support

Mega

€39.00 /month

1,350,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
1,350,000 calls/month
40 req/sec
Platform scale
Dedicated SLA

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

Wind Load API

Structural wind-load maths as an API, computed locally and deterministically. The pressure endpoint computes the velocity (dynamic) pressure of wind, q = ½·ρ·v², from the wind speed and air density — the pressure the wind exerts when it is brought to rest against a surface — and also solves the wind speed back from a given pressure, reporting the speed in m/s, km/h and mph. The force endpoint computes the wind force on a surface, F = q·Cf·A, from the velocity pressure (or wind speed), the exposed area and a force coefficient (≈1.3 for a building wall, ≈1.2 for a flat plate), and — given a height — the overturning moment about the base. The beaufort endpoint converts between a wind speed and the Beaufort scale using v = 0.836·B^1.5, returning the Beaufort number, the standard description from calm to hurricane force and the corresponding pressure. Everything is computed locally and deterministically, so it is instant and private. Ideal for structural and façade-engineering tools, signage, solar-array, scaffold and temporary-structure wind checks, sailing and meteorology apps, and engineering education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is structural wind pressure and force; for wind-turbine energy output use a wind-power API.

api.oanor.com/windload-api

Marine & Surf Forecast API

Marine and surf forecasts as an API, powered by Open-Meteo — clean JSON, no key. Get the current sea state and the hourly and daily wave forecast for any coastline by latitude/longitude or simply by place name: significant wave height, period and direction, plus the swell and wind-wave components broken out separately, and daily maxima and dominant directions. A built-in geocoding helper turns a place name into coordinates. Forecasts run up to ten days ahead. Live forecast data straight from Open-Meteo's marine model. Ideal for surf-report apps, sailing and boating tools, coastal and marine-operations dashboards and beach widgets. 4 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.

api.oanor.com/marine-api

Sea Horizon API

Sea-horizon and visibility maths as an API, computed locally and deterministically — the distance-to-horizon, geographic-range and dip numbers a mariner, coastal navigator or marine app works sightings with. The horizon endpoint gives the distance to the sea horizon ≈ 1.169·√(height of eye in feet) nautical miles, including the standard atmospheric refraction that bends the line of sight a little past the geometric edge — at 9 ft of eye height the horizon is about 3.5 nm off — together with the dip, how far below true horizontal that watery edge lies (≈ 0.97′·√h), the correction subtracted from a sextant altitude shot to the sea horizon. The geographic-range endpoint gives how far off a light or landmark first peeps over the horizon = the sum of two horizon distances, your own plus the object's: 1.169·(√h_eye + √h_object), so a 100 ft lighthouse from a 9 ft cockpit lifts above the sea at about 15 nm — purely geometric, before the light's own luminous range and the visibility. The object-height endpoint inverts it: how tall a tower, light or headland must stand to break the horizon at a target range, or how close you must be before a known landmark appears. Everything is computed locally and deterministically, so it is instant and private. Ideal for marine-navigation and chartplotter apps, coastal-pilotage and lighthouse tools, and sailing utilities. Pure local computation — no key, no third-party service, instant. Geometric/refraction model. 3 compute endpoints. For great-circle distance use a geo-distance API; for set & drift a set-and-drift API.

api.oanor.com/horizon-api

Set and Drift API

Current-sailing (set and drift) navigation maths as an API, computed locally and deterministically — the course-over-ground, course-to-steer and current numbers a mariner, navigator or marine app plots a passage with. The course-made-good endpoint adds the boat's velocity through the water to the current vector to give the real track: the course over ground (COG) and speed over ground (SOG), with the drift angle the current pushes you off your nose — steering 090° through the water at 10 knots with a 2-knot current setting north comes out around 079° over the ground at 10.2 knots. The course-to-steer endpoint solves the other way: the heading to steer to make good a desired ground track, steering up-current to cancel the across-track set (sin(H−T) = −drift·sin(set−track) ÷ speed), and the resulting SOG — usually slower into a current, faster with it astern, and impossible if the current across the track beats your speed. The current endpoint finds the set and drift from the offset between a dead-reckoning position and an observed fix: the set is the bearing DR-to-fix and the drift is that distance ÷ the elapsed time, ready to carry forward. Everything is computed locally and deterministically, so it is instant and private. Ideal for marine-navigation and chartplotter apps, sailing and boating tools, and maritime-training utilities. Pure local computation — no key, no third-party service, instant. Degrees true. 3 compute endpoints. For great-circle distance use a geo-distance API; for tide times a tides API.

api.oanor.com/setanddrift-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Beaufort Wind Scale API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Beaufort Wind Scale API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Beaufort Wind Scale API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does Beaufort Wind Scale API cost?

Beaufort Wind Scale API has a free tier with 100 calls / month. Paid plans start at €4.00 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is Beaufort Wind Scale API GDPR-compliant?

All requests to Beaufort Wind Scale API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Beaufort 3

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/classify

Classify wind speed

Playground

Parameters

Custom headers

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GET /v1/convert

Wind speed convert

Playground

Parameters

Custom headers

Language: Client:

GET /v1/force

Beaufort force lookup

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Spec

Playground

Custom headers

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Code snippets

curl https://api.oanor.com/beaufort-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/beaufort-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/beaufort-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/beaufort-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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Beaufort Wind Scale API

API health

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Related APIs

Wind Load API

Marine & Surf Forecast API

Sea Horizon API

Set and Drift API

Frequently asked questions

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