Marine Weather API

GET

Deliver live ocean weather conditions for any coordinate at sea.

Marine Weather fetches offshore weather conditions for any marine coordinates by latitude and longitude. Each response details high and low temperatures, maximum wind speeds, precipitation totals, humidity, UV index, and sunrise and sunset times.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/marineweather?lat=29.48003&lon=-37.62424

Query parameters

latnumber

lonnumber

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "location": {
      "lat": 29.48003,
      "lon": -37.62424
    },
    "weather": {
      "date": "2026-09-17",
      "avghumidity": 86,
      "condition": "Moderate or heavy rain shower",
      "uv": 5,
      "sunrise": "05:53 AM",
      "sunset": "06:08 PM",
      "moonrise": "12:04 PM",
      "moonset": "10:42 PM",
      "maxtempc": 25.9,
      "maxtempf": 78.6,
      "mintempc": 21.3,
      "mintempf": 70.3,
      "avgtempc": 24.9,
      "avgtempf": 76.8,
      "maxwindmph": 15.4,
      "maxwindkph": 24.7,
      "totalprecipmm": 14.89,
      "totalprecipin": 0.59,
      "totalsnowcm": 0,
      "avgviskm": 7.4,
      "avgvismiles": 4,
      "moonphase": "First Quarter",
      "moonillumination": 42
    }
  }
}

About the Marine Weather API

Marine Weather works by retrieving the marine weather data from various reliable weather sources and providing it in a structured format. You can expect accurate and up-to-date information.

What people use it for

Voyage Route Planning: Commercial shipping dispatchers evaluate maximum wind speeds and precipitation totals along projected corridors to steer vessels away from rough open-sea conditions.
Offshore Fishing Charters: To protect offshore anglers, booking platforms check marine weather conditions, humidity levels, and UV indices before confirming deep-sea reservations.
Regatta Safety Monitoring: When organizing coastal sailing competitions, race committees monitor wind thresholds and precipitation to schedule offshore heats during safe operating windows.
Port Logistics Scheduling: Cargo terminal coordinators track offshore forecast conditions and daylight hours to prepare docking tugs and crane crews for inbound container vessels.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use Marine Weather

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext

Questions.

Common questions about the Marine Weather API.

Read the docs →

Can I check weather conditions for any offshore location worldwide?

Yes, as long as the latitude and longitude coordinates fall within an ocean or sea. The Marine Weather API accepts standard decimal coordinates and returns localized conditions including temperature, wind speed, and precipitation.

Does the response include both metric and imperial units?

Yes, the endpoint returns both measurement systems side by side in every response. You receive temperatures in Celsius and Fahrenheit, wind speed in kilometers per hour and miles per hour, and precipitation in millimeters and inches without doing manual conversions.

Are visibility and moon phase details available on the Free plan?

No, visibility readings and moon data are premium fields. The Free plan returns air temperatures, wind speeds, and precipitation amounts. Any paid plan, starting with Starter, unlocks average visibility in kilometers and miles as well as the current moon phase and illumination percentage.

What would checking 5,000 marine forecasts a month cost me?

At 10 credits per call, 5,000 forecast lookups consume 50,000 credits. That uses one quarter of the Starter plan's 200,000 credits, which covers up to 20,000 calls and works out to about $1.50 per 1,000 calls. The Free plan provides 200 monthly credits, allowing 20 calls to test your integration.

Can I display this marine weather data in a commercial boating or fishing app?

Yes, commercial use is permitted on any paid plan. The Free plan is limited to non-commercial testing. You can display the weather observations inside your own product, provided you do not resell or redistribute the raw data feed as a standalone service.

Request parameters — GET /v1/marineweather

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`lat`Required	number	`29.48003`	The latitude coordinate of the location range -90-90
`lon`Required	number	`-37.62424`	The longitude coordinate of the location range -180-180

Example request

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curl "https://api.apiverve.com/v1/marineweather?lat=29.48003&lon=-37.62424" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — GET /v1/marineweather

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "location": {
      "lat": 29.48003,
      "lon": -37.62424
    },
    "weather": {
      "date": "2026-09-17",
      "avghumidity": 86,
      "condition": "Moderate or heavy rain shower",
      "uv": 5,
      "sunrise": "05:53 AM",
      "sunset": "06:08 PM",
      "moonrise": "12:04 PM",
      "moonset": "10:42 PM",
      "maxtempc": 25.9,
      "maxtempf": 78.6,
      "mintempc": 21.3,
      "mintempf": 70.3,
      "avgtempc": 24.9,
      "avgtempf": 76.8,
      "maxwindmph": 15.4,
      "maxwindkph": 24.7,
      "totalprecipmm": 14.89,
      "totalprecipin": 0.59,
      "totalsnowcm": 0,
      "avgviskm": 7.4,
      "avgvismiles": 4,
      "moonphase": "First Quarter",
      "moonillumination": 42
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`location`	object	`{...}`
`lat`	number	`29.48003`	Latitude coordinate of the marine weather location
`lon`	number	`-37.62424`	Longitude coordinate of the marine weather location
`weather`	object	`{...}`
`date`	string	`"2026-09-17"`	Forecast date in YYYY-MM-DD format
`avghumidity`	number	`86`	Average humidity percentage for the day
`condition`	string	`"Moderate or heavy rain shower"`	Weather condition summary for the day
`uv`	number	`5`	UV index for the day
`sunrise`	string	`"05:53 AM"`	Local sunrise time
`sunset`	string	`"06:08 PM"`	Local sunset time
`moonrise`	string	`"12:04 PM"`	Local moonrise time
`moonset`	string	`"10:42 PM"`	Local moonset time
`maxtempc`	number	`25.9`	Maximum temperature in Celsius for the location
`maxtempf`	number	`78.6`	Maximum temperature in Fahrenheit for the location
`mintempc`	number	`21.3`	Minimum temperature in Celsius for the location
`mintempf`	number	`70.3`	Minimum temperature in Fahrenheit for the location
`avgtempc`	number	`24.9`	Average temperature in Celsius for the location
`avgtempf`	number	`76.8`	Average temperature in Fahrenheit for the location
`maxwindmph`	number	`15.4`	Maximum wind speed in miles per hour
`maxwindkph`	number	`24.7`	Maximum wind speed in kilometers per hour
`totalprecipmm`	number	`14.89`	Total precipitation amount in millimeters
`totalprecipin`	number	`0.59`	Total precipitation amount in inches
`totalsnowcm`	number	`0`	Total snow depth in centimeters
`avgviskm`Premium	number	`7.4`	Average visibility distance in kilometers
`avgvismiles`Premium	number	`4`	Average visibility distance in miles
`moonphase`Premium	string	`"First Quarter"`	Current moon phase description for the location
`moonillumination`Premium	number	`42`	Moon illumination percentage from zero to one hundred

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 10 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	Marine Weather calls	Per 1,000 calls
Free	Free	200	20	Free
Starter	$29.99	200,000	20,000	$1.50
Pro	$99.99	1,000,000	100,000	$1.00
Mega	$299.99	4,000,000	400,000	$0.75

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — GET /v1/marineweather

No SDK to install — this is a plain HTTPS call to /v1/marineweather with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

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curl "https://api.apiverve.com/v1/marineweather" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/marineweather-apiSource, issues and the examples this page is built from.ReferenceMarine Weather API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/marineweathernpm apiverve-marineweatherPyPI APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — GET /v1/marineweather

Install the Node.js SDK, then call the Marine Weather API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/marineweather

Node.js

const res = await fetch("https://api.apiverve.com/v1/marineweather", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/marineweatherThe published Node.js client, versioned and signed.GitHubapiverve/marineweather-apiSource, issues and the examples this page is built from.ReferenceMarine Weather API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

apiverve-marineweatherPyPI APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — GET /v1/marineweather

Install the Python SDK, then call the Marine Weather API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-marineweather

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/marineweather",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

PyPIapiverve-marineweatherThe published Python client, versioned and signed.GitHubapiverve/marineweather-apiSource, issues and the examples this page is built from.ReferenceMarine Weather API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/marineweathernpm APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — GET /v1/marineweather

Install the C# / .NET SDK, then call the Marine Weather API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.MarineWeather

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/marineweather");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.MarineWeatherThe published C# / .NET client, versioned and signed.GitHubapiverve/marineweather-apiSource, issues and the examples this page is built from.ReferenceMarine Weather API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/marineweathernpm apiverve-marineweatherPyPI

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — GET /v1/marineweather

No SDK to install — this is a plain HTTPS call to /v1/marineweather with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/marineweather", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/marineweathernpm apiverve-marineweatherPyPI APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — GET /v1/marineweather

No SDK to install — this is a plain HTTPS call to /v1/marineweather with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/marineweather");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/marineweathernpm apiverve-marineweatherPyPI APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — GET /v1/marineweather

No SDK to install — this is a plain HTTPS call to /v1/marineweather with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/marineweather")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/marineweathernpm apiverve-marineweatherPyPI APIVerve.API.MarineWeatherNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

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Marine Weather API

Try it — live request, no key required

About the Marine Weather API

What people use it for

Ways to call it

Other ways to use Marine Weather

Questions.

Request parameters — GET /v1/marineweather

Required

Authentication

Response — GET /v1/marineweather

Response fields

Response headers

Errors

What a call costs — 10 credits per call

Call it from cURL — GET /v1/marineweather

Resources

Also published for

Call it from Node.js — GET /v1/marineweather

Resources

Also published for

Call it from Python — GET /v1/marineweather

Resources

Also published for

Call it from C# / .NET — GET /v1/marineweather

Resources

Also published for

Call it from Go — GET /v1/marineweather

Resources

Also published for

Call it from PHP — GET /v1/marineweather

Resources

Also published for

Call it from Ruby — GET /v1/marineweather

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Marine Weather API

Weather

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