World Weather Online

What World Weather Online does

World Weather Online, operated by UK-registered Zoomash Ltd, is a weather data API provider that has been in continuous operation since 2010. The company delivers real-time conditions, 15-day hourly forecasts, historical records dating to July 2008, marine and ski weather, plus astronomy, time zone, and location-search data through a suite of RESTful APIs in JSON and XML formats. Its underlying platform centers on a proprietary high-resolution forecasting system marketed with a 99.99% uptime SLA and sub-300ms average response times, with the technical footprint covering millions of global locations.

The product portfolio is organized as a unified weather platform: a flagship Local Weather API is supplemented by specialized endpoints for marine/sailing, ski/mountain, and historical use cases, supported by Search, Time Zone, and Astronomy APIs. Premium features include a Bulk API (up to 10 locations per request), multilingual descriptions in 30+ languages, air quality metrics (PM2.5, PM10, ozone, NO2, SO2, CO), and a Model Context Protocol (MCP) server that exposes the data to AI assistants such as Claude, Cursor, and Windsurf.

The business model is a freemium subscription API: developers sign up in under a minute, receive 500 free calls per day without a credit card, and upgrade to paid tiers for higher quotas, bulk access, and SLA-backed enterprise use. Customers span 400,000+ API users worldwide, including named enterprise accounts in aviation (KLM, Qatar Airways, Athens International Airport), automotive (Volvo, Mitsubishi), consumer goods (Coca-Cola, Wagamama), and digital media (IAC). Go-to-market is developer-first and self-serve, with no traditional sales motion; enterprise relationships are anchored by the SLA and integration reliability rather than outbound sales.

Name

World Weather Online

Legal name

Zoomash Ltd

Website

https://worldweatheronline.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

1–10 employees

Short description

World Weather Online is a UK-based weather data API provider, founded in 2010, serving developers and enterprises globally with real-time conditions, forecasts, historical, marine, and ski weather data via RESTful APIs and a freemium subscription model.

Ownership category

akta.pro rank

Product category

Weather Data API

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Processing & Data Preparation (7374)

akta.pro primary industry

Early Warning, Event Monitoring & Forecasting (Extreme Weather Alerts, Nowcasting) (EUABALAJ)

Keywords

• Weather API services
• Marine weather data
• Historical weather data
• Ski weather forecasts
• Air quality monitoring

Headquarters

HQ city

Manchester

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Infrastructure, Personnel, Operations, Marketing or Sales

Revenue model

1. Weather API Subscriptions: Freemium model with free tier (500 API calls/day) and premium paid tiers offering higher request limits, bulk API access, and additional features. Revenue generated from subscription-based API usage.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

World Weather Online operates a comprehensive RESTful weather API platform delivering real-time conditions, up to 15-day hourly forecasts, historical weather data dating back to July 2008, marine weather, ski and mountain weather, astronomy, and time zone data via JSON and XML formats. The company sells these data feeds on a freemium subscription model to developers, enterprises, and the travel industry worldwide, supported by proprietary high-resolution forecasting, multilingual descriptions, and a Model Context Protocol (MCP) server for AI agent integration.

Product overview

World Weather Online offers a complete suite of weather data APIs built as a unified weather platform with multiple specialized API products. The core offering is the Local Weather API providing real-time conditions and 14-day forecasts, which is supplemented by specialized APIs for marine/sailing weather, ski/mountain weather, and historical weather data. Supporting APIs include Location Search, Time Zone, and Astronomy APIs. Premium features include Bulk API for multi-location queries and Multilingual Support for serving global audiences. Monthly Climate Averages data is available via API or bulk download. All APIs share a common RESTful architecture with JSON/XML response formats and HTTPS authentication.

Differentiator

Problem solved

Functional benefit

Products and services

• Local Weather API
• Marine Weather API
• Marine History API
• Ski Weather API
• Historical Weather API
• Location Search API
• Time Zone API
• Astronomy API
• Bulk API
• Monthly Climate Averages

Quantifiable outcome

• 99.99% uptime guaranteed via SLA
• +2 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered minor and core.

• WeatherAPI.comminorOthersListed as a partner on World Weather Online's website, suggesting cross-referral or complementary service relationship between weather API providers.
• Domaintify.comminorOthersPremium domain name services partner, likely providing domain-related services for the company's web properties.
• MCP Compatible AI Assistants (Claude, Cursor, Windsurf)coreTechnology or IntegrationWorld Weather Online is available as an MCP (Model Context Protocol) server, enabling AI assistants including Claude, Cursor, and other MCP-compatible tools to directly call WWO weather data as tools using API key authentication. This enables seamless integration of weather data into AI agent workflows.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Weatherbit: Weatherbit offers a developer-focused weather API with current conditions, forecasts, historical data, and air quality metrics. It is a direct competitor in the self-serve, API-first weather data segment with comparable free tier and premium pricing structures.
• OpenWeatherMap: OpenWeatherMap is one of the most established weather API providers globally, offering real-time conditions, forecasts, and historical data via REST APIs. It directly competes with WWO in the developer self-serve weather API market with a similar freemium-to-enterprise pricing structure.
• Visual Crossing: Visual Crossing provides a weather data API and historical weather data downloads targeting developers and enterprises. It competes head-to-head with WWO on historical depth, pricing transparency, and self-serve API access for business intelligence and analytics use cases.
• Tomorrow.io (formerly Climacell): Tomorrow.io offers a weather intelligence platform with hyper-local forecasts, marine weather, and aviation APIs, combined with proprietary radar and IoT sensor networks. It targets the same developer and enterprise segments as WWO but with deeper vertical integration and significantly larger venture funding.
• WeatherAPI.com: WeatherAPI.com is a direct competitor offering real-time, forecast, historical, marine, and astronomy weather data via RESTful APIs with a freemium model. Notably, it is also listed as a partner on WWO's website, suggesting a cross-referral relationship between competitors serving the same developer market.

Broad incumbents

• AccuWeather: AccuWeather is a major incumbent in weather data and forecasting, offering enterprise APIs and content licensing. It competes with WWO for media, retail, and enterprise weather data customers but operates at significantly larger scale with proprietary forecasting capabilities.
• DTN: DTN is a major incumbent providing weather, agricultural, and commodity data services to enterprise customers including airlines, energy, and agriculture. It overlaps with WWO's aviation and agriculture segments but as part of a much broader operational intelligence portfolio.
• Xweather (by Vaisala): Xweather, backed by Vaisala's proprietary global observation network, provides high-accuracy weather APIs for aviation, marine, road weather, and outdoor industries. It competes with WWO's vertical APIs while offering a deeper data moat through owned sensor infrastructure.
• IBM Environmental Intelligence Suite (formerly The Weather Company): IBM's Environmental Intelligence Suite (built on The Weather Company assets) is a broad enterprise weather and climate data platform serving aviation, agriculture, energy, and supply chain. It competes with WWO for large enterprise weather data contracts but with much deeper integrations, certifications, and analytics tooling.

Emerging players

• Meteomatics: Meteomatics provides high-resolution weather data APIs including aviation, marine, and renewable energy forecasts, with proprietary downscaling capabilities. It overlaps with WWO's vertical-specific APIs (marine, ski) and competes for enterprise customers requiring high-accuracy forecasting.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/worldweatheronl
• Facebookfacebook.com/worldweatheronline
• LinkedInlinkedin.com/company/world-weather-online

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about World Weather Online