World Weather Online

io.github.WorldWeatherOnlinePublished by GitHub account WorldWeatherOnlinev1.0.0Updated Oct 24, 2026

Global weather API: forecasts, historical data, marine, ski, astronomy and timezone.

VerifiedStreamable HTTPWeb executableLocation & LifestyleData & Analytics

Overview

AI-generated overview

Remote World Weather Online MCP server that lets an assistant fetch forecasts, historical weather, marine, ski, astronomy, timezone and climate data.

What you can do
Get current conditions and a 14-day forecast for a location, plus past weather from 2008 onwards and 12-year monthly climate averages for a place. Retrieve marine data such as swell, tides and water temperature, and ski forecasts for top, mid and base elevations. Look up sunrise, sunset and moon phase, and get local time with UTC offset. Resolve place names through location autocomplete.
When to use it
Useful when an assistant needs weather or climate information for travel planning, outdoor or marine activities, skiing, or historical weather comparisons, without building a separate weather API integration.
Requirements
A remote MCP endpoint at mcp.worldweatheronline.com, connected over streamable HTTP. A World Weather Online API key is passed as the key query parameter in the connection URL. Network access is required.
Before you install
The API key is placed in the connection URL as a query parameter, so it may appear in client configuration files and logs; treat it as a secret. Requests go to World Weather Online's service, and usage may be subject to that provider's plan limits and terms.

Installation

In SourceWeft

  1. Open World Weather Online in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.WorldWeatherOnline%2Fwwo-mcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "world-weather-online": {
      "type": "http",
      "url": "https://mcp.worldweatheronline.com/mcp"
    }
  }
}

README

World Weather Online — MCP Server (Railway)

MCP server for World Weather Online. Lets AI assistants like Claude, Cursor, and others call WWO weather data directly as tools.

Deploy to Railway

Step 1 — Push to GitHub

  1. Create a new repository on github.com (call it wwo-mcp-server)
  2. Open Terminal in this folder and run:
bash
git initgit add .git commit -m "Initial commit"git remote add origin https://github.com/YOUR_USERNAME/wwo-mcp-server.gitgit push -u origin main

Step 2 — Deploy on Railway

  1. Go to https://railway.app and sign up / log in with GitHub
  2. Click New Project → Deploy from GitHub repo
  3. Select your wwo-mcp-server repository
  4. Railway detects Node.js automatically and deploys

Your server will be live at a URL like:

https://wwo-mcp-server-production.up.railway.app

Step 3 — Add Custom Domain

  1. In Railway dashboard → your project → Settings → Networking → Custom Domain

  2. Type mcp.worldweatheronline.com and click Add

  3. Railway shows you a CNAME value like:

    wwo-mcp-server-production.up.railway.app

  4. Go to your DNS provider and add:

    TypeNameValue
    CNAMEmcpwwo-mcp-server-production.up.railway.app

  5. SSL certificate is provisioned automatically within minutes

Step 4 — Test

Visit your health endpoint:

https://mcp.worldweatheronline.com/health

Test in MCP Inspector:

https://mcp.worldweatheronline.com/mcp?key=YOUR_WWO_API_KEY

Connecting AI Clients

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

json
{  "mcpServers": {    "world-weather-online": {      "url": "https://mcp.worldweatheronline.com/mcp?key=YOUR_API_KEY"    }  }}

Cursor / Windsurf

Add to .cursor/mcp.json:

json
{  "mcpServers": {    "world-weather-online": {      "url": "https://mcp.worldweatheronline.com/mcp?key=YOUR_API_KEY"    }  }}

Available Tools

ToolDescription
get_weatherCurrent conditions + 14-day forecast
get_historical_weatherPast weather from 2008 onwards
get_marine_weatherSwell, tides, water temperature
get_ski_weatherTop/mid/base elevation forecasts
search_locationLocation autocomplete
get_astronomySunrise, sunset, moon phase
get_timezoneLocal time + UTC offset
get_climate_averagesMonthly 12-year climate averages

Local Development

bash
npm installnpm run dev

Server runs at http://localhost:3000

Source: README.md at commit 60a2426

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.