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Storm Glass Marine Weather vs Weather Underground API

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

APIStorm Glass Marine WeatherNEW—Weather Underground APIREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Storm Glass Marine Weather vs Weather Underground API: common questions

Which is more reliable, Storm Glass Marine Weather or Weather Underground API?

On our scheduled checks, Weather Underground API leads on measured uptime — Storm Glass Marine Weather at —% versus Weather Underground API 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 Storm Glass Marine Weather and Weather Underground API need an API key?

Both ask you to authenticate — Storm Glass Marine Weather uses an API key and Weather Underground API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Storm Glass Marine Weather and Weather Underground API from the browser?

Yes — both Storm Glass Marine Weather and Weather Underground API 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 Storm Glass Marine Weather and Weather Underground API free for commercial use?

Storm Glass Marine Weather has unclear commercial terms, and Weather Underground API 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.