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Latest Message

(2018/01/16 22:20 HKT)

The "Astronomical, Geographic and Meteorological Events of 2017" election has concluded and the first three places are as follows:

  • 1st: [Aug 23] Super Typhoon Hato battered the Pearl River Estuary with Signal 10 in Hong Kong and Macau (113 votes; 93.39%)
  • 2nd: [Aug 27] Severe Tropical Storm Pakhar approached; winds at Cheung Chau neared the upper threshold for storm force winds (81 votes; 66.94%)
  • 3rd: [Jul 23] Tropical Storm Roke made landfall at Sai Kung East but local winds were weak (70 votes; 57.85%)
A complete listing is available in this page. Thank you for your support!

(2018/01/14 19:30 HKT)

A total lunar eclipse will occur in the night of January 31 (Wed), and is visible in Hong Kong. Please visit our page on the eclipse for more information. A preview animation of the eclipse is available here.

+Eclipse times

Warning(s) in Force [Details] [Def]


Earthquake Info

+M 6.3 - 76km S of Putre, Chile

UTC Time: Sun 2018/01/21 01:06:42
Local Time: Sat 2018/01/20 21:06:42
HK Time: Sun 2018/01/21 09:06:42

Location: 18.89S 69.62W; Magnitude: 6.3
19,455 km from HK
Depth: 110.82 km

+M 4.9 - 25km WSW of Darapidap, Philippines

UTC Time: Sat 2018/01/20 19:56:03
Local Time: Sun 2018/01/21 03:56:03
HK Time: Sun 2018/01/21 03:56:03

Location: 17.13N 120.19E; Magnitude: 4.9
853 km SE of HK
Depth: 23.1 km

Weather Details around Hong Kong [Details] [HKO link]

Regional Weather of Hong Kong

Tropical Cyclone Information [Details] [HKO link]

Astronomical / Tidal Information [Details] [HKO link]

Info for 21/01/2018 (Sunday):
Astro. Info
Sunrise:07:0506:070.6 m
Sunset:18:0413:111.5 m
Moonrise:09:4517:251.2 m
Moonset:21:4223:332.1 m

Planetary phenomena in the coming week:
Jan 25, 06:20 HKT: First Quarter
(Source: NASA)

Weather at a Glance [Details] [HKO link]

Weather at a Glance Data as of 16:30 on 21/1/2018

20.2 C 74 % 1013.5 hPa
All measurements taken at Hong Kong Observatory
HKO Temp.:20.2 C
RH.: 74 %
Apparent Temp.:20.2 C
Dew Point:15.4 C
Temp. of today:21.5 / 16.8 C (Range 4.7 C)
Mean SLP.:1013.5 hPa
King's Park Wind:1 km/h (SE)
UV:2 (Low)
Rain:0.0 mm (past 15 min)

Upper-Level Weather Information [Details]

Data as of 20:00 HKT on 20/1/2018 - Level of instability:

Delta P Values

At 2018/01/21 14 HKT: [Explanation] [Values for the past 10 days]

Delta p(972) = 4.9
Delta p(S) = 5.2

3-day Weather Forecast [Click for 9-day] [HKO link]

3-day Weather Forecast Data as of 16:30 HKT 21/Jan/2018

General Situation: The band of clouds now covering southeastern China will dissipate gradually in the next couple of days. An intense northeast monsoon will start to affect the south China coast midweek this week, becoming cloudier over the region with temperatures falling progressively. It will be cold early next week.

22/1 (Mon)

Mainly cloudy with relatively low visibility. There will be sunny periods.

Mainly fine. Visibility relatively low in some areas at first.

Mainly cloudy with one or two rain patches.
Wind NE force 2 to 3. E force 4 to 5. E force 5, force 6 offshore.
17 - 23 °C
16 - 21 °C
16 - 18 °C
65 - 90 %
65 - 85 %
80 - 95 %

Weather Conditions in South China Sea [Details] [HKO link]

Real-time Weather Photos [Details] [HKO link]

The following photo shows the real-time view of Victoria Harbour (active from 5am to 9pm), as viewed from Central towards the east.

Real-time photo at Central

Satellite / Radar Images [Details]

Radar: 256 km range

Radar: 128 km range

Radar: 64 km range

Satellite: IR imagery*

* The Satellite imagery above is taken by Himawari-8 operated by the Japan Meteorological Agency (JMA).

Aviation Weather Observation Report [HKO link]

HK International Airport METAR report Data as of 16:30 HKT on 21 Jan 18

Original code: METAR VHHH 210830Z 26009KT 8000 FEW035 21/15 Q1013 NOSIG=

Wind Visibility Weather Cloud Amount Cloud Base Temperature Dew Point Pressure (QNH)
9 knots from 260 degrees (W)
8 km
No significant weather
1 to 2 oktas
3500 feet
21 oC
15 oC
1013 hPa

Next Two Hours Change
No Significant Change

Meteorological Calculation

A. Conversion between units


B. Calculation of distance between places on Earth

Place 1:     Lat :   Long :
Place 2:     Lat :   Long :

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All weather information of Hong Kong contained in this site is given by the Hong Kong Observatory. Permission has been granted by the Observatory for the reproduction of weather information in this site.

Last Modified: Thu, Jan 04 2018