Hong Kong Observatory API alternatives

Provide weather information, earthquake information, and climate data. If it doesn't fit your project, here are the 10 best free Weather APIs to use instead in 2026, out of 45 in the directory.

For reference, Hong Kong Observatory API: No API key needed · 100% uptime (30 days) · HTTPS.

1. 1

   Veabird API

   Online · 947 ms

   Beach (sargassum, waves, hurricanes) and ski snow forecasts for 1,900+ resorts, no key.

   • No API key needed
   • 100% uptime (30 days)
   • Returns JSON at its URL
   • Callable from the browser (CORS)

   No authHTTPSCORS
2. 2

   WeatherTotals API

   Online · 1147 ms

   Measured US snow, rain, hail and aurora totals by state and city.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   US Weather API

   Online · 1027 ms

   US National Weather Service. A free weather API by weather.gov.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   FMI Open Data API

   Online · 3753 ms

   Finnish weather, sea, climate and radar observations via open WFS.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   NASA POWER API

   Online · 2413 ms

   Global solar and weather data for energy and agriculture.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   Open-Meteo API

   Online · 2056 ms

   Global weather forecast API for non-commercial use.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   Open-Meteo Ensemble API

   Online · 2080 ms

   Weather ensemble forecasts from multiple models.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   Pirate Weather API

   Online · 1653 ms

   Free weather API with forecast data similar to Dark Sky.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
9. 9

   RainViewer API

   Online · 1062 ms

   Radar data collected from different websites across the Internet.

   • No API key needed
   • 100% uptime (30 days)
   • HTTPS

   No authHTTPSCORS ?
10. 10

    wttr.in API

    Online · 1764 ms

    Weather in your terminal, supports JSON output.

    • No API key needed
    • 100% uptime (30 days)
    • Callable from the browser (CORS)
    • HTTPS

    No authHTTPSCORS

Hong Kong Observatory API vs alternatives

Hong Kong Observatory API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Hong Kong Observatory	No	Yes	Unknown	100%	2134 ms	Not rated
Veabird	No	Yes	Yes	100%	947 ms	Not rated
WeatherTotals	No	Yes	Yes	100%	1147 ms	Not rated
US Weather	No	Yes	Yes	100%	1027 ms	Not rated
FMI Open Data	No	Yes	Yes	100%	3753 ms	Not rated
NASA POWER	No	Yes	Yes	100%	2413 ms	Not rated
Open-Meteo	No	Yes	Yes	100%	2056 ms	Not rated
Open-Meteo Ensemble	No	Yes	Yes	100%	2080 ms	Not rated
Pirate Weather	No	Yes	Yes	100%	1653 ms	Not rated

See also: best Weather APIs · all Weather APIs