Marine Weather API Reference

Overview

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.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

GEThttps://api.apiverve.com/v1/marineweather

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

const res = await fetch('https://api.apiverve.com/v1/marineweather?lat=29.48003&lon=-37.62424', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://api.apiverve.com/v1/marineweather?lat=29.48003&lon=-37.62424",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/marineweather?lat=29.48003&lon=-37.62424", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

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.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

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

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "location": {
      "lat": 29.48003,
      "lon": -37.62424
    },
    "weather": {
      "maxtempc": 22.9,
      "maxtempf": 73.2,
      "mintempc": 21.8,
      "mintempf": 71.2,
      "avgtempc": 22.5,
      "avgtempf": 72.5,
      "maxwindmph": 11.1,
      "maxwindkph": 17.9,
      "totalprecipmm": 3.29,
      "totalprecipin": 0.13,
      "totalsnowcm": 0,
      "avgviskm": 9.9,
      "avgvismiles": 6,
      "moonphase": "Waning Crescent",
      "moonillumination": 16
    }
  }
}

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	`{...}`
`maxtempc`	number	`22.9`	Maximum temperature in Celsius for the location
`maxtempf`	number	`73.2`	Maximum temperature in Fahrenheit for the location
`mintempc`	number	`21.8`	Minimum temperature in Celsius for the location
`mintempf`	number	`71.2`	Minimum temperature in Fahrenheit for the location
`avgtempc`	number	`22.5`	Average temperature in Celsius for the location
`avgtempf`	number	`72.5`	Average temperature in Fahrenheit for the location
`maxwindmph`	number	`11.1`	Maximum wind speed in miles per hour
`maxwindkph`	number	`17.9`	Maximum wind speed in kilometers per hour
`totalprecipmm`	number	`3.29`	Total precipitation amount in millimeters
`totalprecipin`	number	`0.13`	Total precipitation amount in inches
`totalsnowcm`	number	`0`	Total snow depth in centimeters
`avgviskm`Premium	number	`9.9`	Average visibility distance in kilometers
`avgvismiles`Premium	number	`6`	Average visibility distance in miles
`moonphase`Premium	string	`"Waning Crescent"`	Current moon phase description for the location
`moonillumination`Premium	number	`16`	Moon illumination percentage from zero to one hundred

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Use cases

Marine Navigation: Navigate the seas by using the Marine Weather API to get marine weather data. Use the data to plan routes and avoid hazardous weather conditions
Fishing Forecast: Forecast fishing conditions by using the Marine Weather API to get marine weather data. Use the data to predict fish behavior and plan fishing trips
Boating Safety: Ensure boating safety by using the Marine Weather API to get marine weather data. Use the data to monitor weather conditions and make informed decisions on boating activities
Ocean Research: Conduct ocean research by using the Marine Weather API to get marine weather data. Use the data to study weather patterns and their impact on marine ecosystems

Other ways to use Marine Weather

Set up Marine Weather on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Use it in Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →

Marine Weather