API · /seatemp-api

Sea Temperature & Waves API

healthy 3,481 Subscribers

Real-time and forecast ocean conditions for any coastal or open-water location. Get the current sea-surface temperature (in °C and °F) together with a wave snapshot — height, direction, period, swell and wind-wave — pull an hourly series of temperature and waves, or a daily forecast with sea-temperature min/avg/max and wave aggregates. Global ocean coverage sourced from Open-Meteo’s Marine model, delivered through a fast, reliable API; inland coordinates return a clear not-found so you always know you have ocean data. Ideal for surf and sailing apps, fishing and diving, beach and tourism services, shipping and coastal or climate monitoring.

#sea #ocean #temperature #waves #marine #surf

api.oanor.com/seatemp-api

Get an API key Try in playground → Contact provider

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

/api/seatemp-api/openapi.json

/api/seatemp-api/llms.txt

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

Sea Temperature & Waves API — live data on the oanor API marketplace

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 145 ms; Server probes · 24h
Subscribers: 3,481; active
Total calls: 57; last 7 days

Full status page → · 9 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

1,000 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
1,000 requests/month, 2 req/s
Current, hourly & daily-forecast
Sea temperature + wave conditions
No credit card

Basic

€5.00 /month

75,000 calls / month
5 requests / second
Hard cap (429 above quota, no overage)
75,000 requests/month, 5 req/s
°C and °F, swell & wind-wave
Hourly series up to 7 days
Commercial use, email support

Pro

€15.00 /month

300,000 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
300,000 requests/month, 15 req/s
High-volume marine data
Daily min/avg/max sea temperature
Priority email support

Mega

€39.00 /month

1,200,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
1,200,000 requests/month, 40 req/s
Surf, sailing & shipping scale
Maximum concurrency
Priority support

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

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

Marine Buoys API

Live marine weather and ocean conditions from NOAA's National Data Buoy Center (NDBC). The station catalogue (1,930 moored buoys and coastal stations worldwide) is searchable by name, type or coordinate; the live endpoint returns the latest observation for any station: significant wave height, wave period and direction, water and air temperature, wind speed/gust/direction, atmospheric pressure and more. Find the nearest buoys to any lat/lon. Ideal for surfing & sailing apps, marine operations, coastal monitoring and oceanography.

api.oanor.com/buoys-api

Tides API

High and low tide predictions for thousands of US coastal stations, powered by NOAA CO-OPS. Search the station directory by state or name, pull full station metadata (coordinates and time zone), and get tide predictions as high/low events or an hourly height series for up to seven days, in feet or metres and against the datum of your choice (MLLW, MSL, MHHW and more). Delivered through a fast, reliable API with clear errors for invalid stations. Ideal for boating and sailing, fishing and surfing, ports and logistics, beach and tourism services and coastal planning.

api.oanor.com/tides-api

Thermocouple API

Type-K thermocouple temperature/voltage conversion as an API, computed locally and deterministically from the official NIST ITS-90 reference functions. The voltage endpoint converts a junction temperature in °C to the thermo-electromotive force in millivolts using the NIST type-K direct polynomial (with its Gaussian correction term above 0 °C), and performs cold-junction compensation by subtracting the reference-junction EMF, so a hot junction at 200 °C against a 25 °C terminal block gives the EMF your meter actually reads; a type-K junction produces 4.096 mV at 100 °C and 41.276 mV at 1000 °C against a 0 °C reference. The temperature endpoint does the inverse: it takes the measured EMF in millivolts and the reference-junction temperature, refers the reading back to 0 °C by adding the cold-junction EMF, and returns the hot-junction temperature in °C and K — obtained by numerically inverting the same monotonic forward polynomial, so it is exactly consistent with the forward conversion. Type K (chromel–alumel) covers −270 to 1372 °C. Everything is computed locally and deterministically, so it is instant and private. Ideal for industrial-automation, process-control, data-acquisition, IoT-sensor, furnace and lab-instrument app developers, sensor-linearization and cold-junction-compensation tools, and embedded firmware. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 2 endpoints. This is the type-K thermocouple; for resistance-temperature detectors use an RTD/PT100 API.

api.oanor.com/thermocouple-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Sea Temperature & Waves API?

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

What's the rate limit for Sea Temperature & Waves 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 Sea Temperature & Waves API cost?

Sea Temperature & Waves API has a free tier with 100 calls / month. Paid plans start at €5.00 / 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 Sea Temperature & Waves API GDPR-compliant?

All requests to Sea Temperature & Waves 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.

Sea 3

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

GET /v1/current

Current sea temperature + waves

Playground

Parameters

Custom headers

Language: Client:

GET /v1/forecast

Daily sea temperature + wave forecast

Playground

Parameters

Custom headers

Language: Client:

GET /v1/hourly

Hourly sea temperature + waves

Playground

Parameters

Custom headers

Language: Client:

Code snippets

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

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

$ch = curl_init("https://api.oanor.com/seatemp-api/SOME_PATH");
curl_setopt($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/seatemp-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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Sea Temperature & Waves API

API health

Pricing

Built by

Related APIs

Marine & Surf Forecast API

Marine Buoys API

Tides API

Thermocouple API

Frequently asked questions

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