Local Weather
Weather Forecast
Weather Warnings
Weather for Fishermen
Weather for Marine
Weather for Aviation
Weather Monitoring Imagery
GIS Weather Service
Tropical Cyclone
China Weather
World Weather
Climate Information Service
Warnings & Signals Database
Statistics of Special Weather Events
Monthly Weather Summary
Climate Change
El Nino and La Nina
Earthquakes
Tsunamis
Tide
Geomagnetism
Space Weather
Weather Information for Astronomical Observation
Interactive Sun Path Diagram
Astronomical Data
Interesting Astronomical Phenomena
Time Services
Calendar
Almanac
Real time Radiation level in Hong Kong
Understanding Radiation
Radiation Monitoring, Assessment and Protection
Environmental Radiation Monitoring Programme
Daya Bay Contingency Plan
Related Sites
Schools
Travel
Sports
Outdoor Photography
CWOS
Senior Citizens
Stargazers
FoOb
My Little Observatory
Interactive Map of Storm Damage by Mangkhut
Educational Resources
360 Tour of HKO
Decoding Radiation
A Tour of Tropical Cyclones
Cloud Appreciation by Dr Tin
International Cloud Atlas
Guided Tour
Courses and Activities for the Public
Subscription of e-Bulletins
Research Forum
Publications
International Atomic Energy Agency
Regional Specialized Meteorological Centre for nowcasting
Asian Aviation Meteorological Center
Social Media
Press Releases
What's New
HKO Updates
LegCo Questions and Answers
Weather Chit Chat
Observatory's Blog
Weather On-Air
Cool Met Stuff
Central Briefing
Tropical Cyclone Report Broadcast
Observatory's News
Vacancies
Tender Notices
Apps
Personalized Website
Weather Wizard
Weather Information in Text
Weather Information in RSS
Audio Web Page
Forms
Open Data
HKO Corporate Video
Vision and Mission
Organizational Structure
Quality Management
Hong Kong Observatory – The Facts
Hong Kong Observatory 2023
Our Services
Programme Areas of the Observatory
History of the Hong Kong Observatory
Career@HKO
Visitors Figures
Hong Kong Observatory Open Day 2025
Tropical Cyclone Statistics
Number of Days with Signals in Hong Kong
Number of Tropical Cyclones Necessitating the Issuing of Warning Signal
in Hong Kong
Annual number of tropical cyclones (including tropical depressions) entering the 500 km range of Hong Kong
Frequency and Total Duration of Display of Tropical Cyclone Warning Signals since 1956
Tropical Cyclones Requiring the Issuing of the Hurricane Signal No. 10
HKO Warnings and Signals Database
Historical Records of Using Typhoon Gun and Explosives as Tropical Cyclone Warning in Hong Kong
