Hong Kong Observatory Open Data API

API

Free open data API for Hong Kong weather, earthquake, and climate information

Overview

This API provides RESTful access to Hong Kong-specific weather data (current conditions, 7-day forecasts, hourly updates), real-time earthquake notifications, and historical climate records (monthly averages, extreme weather events). Responses are available in JSON and XML formats. Use cases include integrating weather forecasts into mobile apps for HK residents, embedding earthquake alerts on news portals, analyzing climate trends for research projects, and helping businesses plan outdoor operations based on accurate local weather 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
JSON & XML support
No authentication required
Real-time weather observations
Historical climate data
Earthquake alerts

Frequently Asked Questions

? Is Hong Kong Observatory Open Data API free to use?

Yes, it is completely free for public and commercial use as part of the Hong Kong Observatory's open data initiative.

? Does it require an API Key?

No, authentication is not required to access the API endpoints.

? What is the response format?

Responses are available in both JSON and XML formats, depending on the specific endpoint selected.

Top Alternatives

OpenWeatherMap API (global coverage including HK) Search Google

AccuWeather API (detailed HK weather data) Search Google

Tool Info

Pricing Free

Category Weather

Platform Public API

Pros

⊕ Free to use
⊕ Comprehensive HK-focused data
⊕ Multiple response formats
⊕ Covers weather, earthquake, and climate categories

Cons

⊖ HK region-specific only
⊖ Potential rate limits (not explicitly documented)
⊖ Limited multilingual documentation