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Hong Kong Observatory vs Storm Glass Marine Weather

Same instrument, two spec sheets — measured, not claimed.

APIHong Kong ObservatoryNEW—Storm Glass Marine WeatherNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseHKO open data (see terms of use)Unverified
Free tierFree, no keyFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Hong Kong Observatory vs Storm Glass Marine Weather: common questions

Which is more reliable, Hong Kong Observatory or Storm Glass Marine Weather?

On our scheduled checks, Storm Glass Marine Weather leads on measured uptime — Hong Kong Observatory at —% versus Storm Glass Marine Weather at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Hong Kong Observatory and Storm Glass Marine Weather need an API key?

Hong Kong Observatory needs no key, while Storm Glass Marine Weather requires a free API key. If you want to start calling without signup, reach for Hong Kong Observatory first.

Can I call Hong Kong Observatory and Storm Glass Marine Weather from the browser?

Yes — both Hong Kong Observatory and Storm Glass Marine Weather send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Hong Kong Observatory and Storm Glass Marine Weather free for commercial use?

Hong Kong Observatory has unclear commercial terms, and Storm Glass Marine Weather has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.