Hong Kong Observatory

API

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

Overview

The Hong Kong Observatory API provides RESTful access to real-time weather readings (current conditions, 7-day forecasts), earthquake information (local tremors, regional seismic events), and historical climate data (temperature, rainfall, humidity trends). Responses are in JSON format. Key endpoints include current weather stats, 7-day forecasts, latest earthquake alerts, and monthly climate summaries. Ideal for developers building HK-centric weather apps, researchers analyzing regional climate patterns, media platforms adding real-time earthquake updates, or businesses optimizing operations based on local weather conditions.

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
JSON Support
No Auth Required
Real-time Weather Updates
Historical Climate Data

Frequently Asked Questions

? Is Hong Kong Observatory API free to use?

Yes, it is completely free for both public and commercial use under the Hong Kong Observatory Open Data Policy.

? Does it require an API Key?

No, most endpoints do not require an API key, allowing easy and quick integration.

? What is the response format?

The majority of responses are in JSON format, which is widely supported and easy to parse across programming languages.

Top Alternatives

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Tool Info

Pricing Free

Category Weather

Platform Public API

Pros

⊕ Free to use
⊕ HK-focused comprehensive data
⊕ Covers weather, earthquake, and climate categories
⊕ Regular data updates

Cons

⊖ Regional focus limited to Hong Kong and vicinity
⊖ Potential rate limits for high-volume usage
⊖ No international weather coverage