Sites using Hong Kong Observatory 
Hong Kong's official meteorological service, publishing open weather and warning data.
Found via: StackScope Discovery (Indie) 3 · StackScope Wider Web 1
Hong Kong Observatory has been detected on 4 launches since first appearing in July 2026. Most recent detection: Pockia — 裝進口袋的香港脈搏, on August 29, 2026.
It's most commonly paired with Cloudflare DNS, HSTS, and Cloudflare.
Share of new sites using Hong Kong Observatory
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
Weather leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Open-Meteo
|
0.03% | 73.23% |
| #2 | – |
Windy
|
0.01% | 13.01% |
| #3 | – | RainViewer | <0.01% | 5.18% |
| #4 | ▲4 |
WillyWeather
|
<0.01% | 3.72% |
| #5 | ▲3 |
Ambient Weather
|
<0.01% | 3.40% |
| … | ||||
| #32 | ▼13 |
Hong Kong Observatory
Current page
|
<0.01% | 0.22% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Weather tool.Among August launches it ranked #25 in Weather, down from #12 in July. All 87 in Weather →
Often used with
| Tool | Sites |
|---|---|
Cloudflare DNS
|
4 |
| HSTS | 4 |
Cloudflare
|
3 |
Google Search Console
|
2 |
Google Analytics
|
2 |
Tools most often detected on the same sites as Hong Kong Observatory.
Recent launches we can show
3 of the 4 sites using Hong Kong Observatory are product launches we list individually. The other 1 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
The StackScope API serves all 4 sites using Hong Kong Observatory, filterable and exportable, from £15 a month.