Storm Glass Marine Weather vs wttr.in

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished (informal per-IP throttling)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Storm Glass Marine Weather vs wttr.in: common questions

Which is more reliable, Storm Glass Marine Weather or wttr.in?

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

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

Can I call Storm Glass Marine Weather and wttr.in from the browser?

Yes — both Storm Glass Marine Weather and wttr.in 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 wttr.in free for commercial use?

Storm Glass Marine Weather has unclear commercial terms, and wttr.in 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.