Hong Kong Observatory API

API

Free official weather, earthquake, and climate data API from Hong Kong Observatory

Overview

The Hong Kong Observatory API offers RESTful endpoints for real-time weather data (temperature, humidity, rainfall), 7-day forecasts, earthquake alerts (magnitude, epicenter), and historical climate statistics (monthly averages, precipitation trends). Responses are in JSON format. Ideal for building Hong Kong-focused weather apps, earthquake monitoring tools, climate research platforms, or integrating local weather insights into travel, logistics, or educational resources using reliable, official meteorological data.

Example Integration (JavaScript)

script.js JS


fetch('https://www.hko.gov.hk/en/abouthko/opendata_intro.htm')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful endpoints
JSON response format
Real-time weather updates
Earthquake alerts
Historical climate data
No API key required
Official Hong Kong data source

Frequently Asked Questions

? Is the Hong Kong Observatory API free to use?

Yes, all open data endpoints from the Hong Kong Observatory are available for free without any subscription or usage fees.

? Does it require an API Key?

No, most endpoints do not require an API key, allowing direct access to the data for integration.

? What is the response format?

The API primarily returns data in JSON format, which is widely compatible with most programming languages and applications.

Top Alternatives

OpenWeatherMap API Search Google

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Tool Info

Pricing Free

Category Weather

Platform Public API

Pros

⊕ Free access to all endpoints
⊕ Trusted official meteorological data
⊕ Covers multiple data types (weather, earthquake, climate)
⊕ Easy integration with no authentication needed

Cons

⊖ Region-specific coverage (focused on Hong Kong and vicinity)
⊖ Potential rate limits for high-volume requests
⊖ Limited to data from Hong Kong’s monitoring network