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Latest Message

(2021/01/16 11:30 HKT)

The "Astronomical, Geographic and Meteorological Events of 2020" election has concluded. Thank you for your support. A total of 141 votes were received this year, and the top three events are listed below:

  • Rank #1: Tropical cyclone Higos impacted the Pearl River Estuary, leading to the issuance of the #9 and #10 Signal in Hong Kong and Macau, respectively (111 votes; 78.72%)
  • Rank #2: The minimum temperature of 8.1 degrees on 31/12 amid a cold surge was the lowest in the year (89 votes; 63.12%)
  • Rank #3: Tropical cyclone Nangka crossed the South China Sea, leading to the #8 Signal again in Hong Kong (86 votes; 60.99%)
Please click here for the rest of the results.

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

Earthquake Info

+M 6.4 - 29 km WSW of Pocito, Argentina

UTC Time: Tue 2021/01/19 02:46:22
HK Time: Tue 2021/01/19 10:46:22

Location: 31.82S 68.85W; Magnitude: 6.4
18,903 km from HK
Depth: 20 km

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

Regional Weather of Hong Kong

Tropical Cyclone Information [Details] [HKO link]

Tropical Cyclone Track

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

The following photo shows the real-time view of Victoria Harbour, as viewed from Central towards the east.

Real-time photo at Central

Astronomical / Tidal Information [Details] [HKO link]

Info for 19/01/2021 (Tuesday):
Astro. Info
Sunrise:07:0500:202.00 m
Sunset:18:0307:280.81 m
Moonrise:11:1415:161.57 m
Moonset:23:3719:021.34 m

Planetary phenomena in the coming week:
Jan 21, 05:02 HKT: First Quarter
Jan 21, 21:11 HKT: Moon Apogee: 404400 km
Jan 24, 09:59 HKT: Mercury Elongation: 18.6° E
Jan 24, 10:26 HKT: Saturn Conjunction
Jan 25, 05:47 HKT: Moon Ascending Node
Jan 26, 23:39 HKT: Moon North Dec.: 24.9° N
(Source: NASA)

Weather at a Glance [Details] [HKO link]

Weather at a Glance Data as of 17:00 on 19/1/2021

16.5 C 56 % 1018.8 hPa
All measurements taken at Hong Kong Observatory
HKO Temp.:16.5 C
RH.: 56 %
Apparent Temp.:16.5 C
Dew Point:7.7 C
Temp. of today:17.4 / 12.6 C (Range 4.8 C)
Mean SLP.:1018.8 hPa
King's Park Wind:12 km/h (E)
UV:0.5 (Low)
Rain:0.0 mm (past 15 min)

Upper-Level Weather Information [Details]

Data as of 08:00 HKT on 19/1/2021 - Level of instability:

Delta P Values

At 2021/01/19 14 HKT: [Explanation] [Values for the past 10 days]

Delta p(972) = -0.5
Delta p(S) = 8.5 (strong E wind at Waglan)

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

3-day Weather Forecast Data as of 16:30 HKT 19/Jan/2021

General Situation: An easterly airstream will affect the south China coast in the next couple of days. Meanwhile, a band of clouds will bring rainy weather to southern China. Under the influence of the northeast monsoon, the weather will be generally fine over Guangdong during the weekend and early next week. It will be cool in the morning and at night.

20/1 (Wed)

Mainly cloudy. One or two light rain patches in the morning and at night.

Mainly cloudy with one or two rain patches.

Mainly cloudy. Sunny intervals during the day. One or two rain patches in the morning and at night.
Wind E force 4 to 5, occasionally force 6 offshore at first. E to NE force 4 to 5. NE force 4.
15 - 19 °C
17 - 20 °C
18 - 22 °C
65 - 90 %
75 - 95 %
70 - 90 %

Extended Temperature Outlook [HKO link]

Maximum temperature:

Maximum temperature

Minimum temperature:

Maximum temperature

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

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 17:00 HKT on 19 Jan 21

Original code: METAR VHHH 190900Z VRB02KT 9999 FEW035 SCT045 17/06 Q1018 BECMG 10010KT=

Wind Visibility WeatherCloud AmountCloud BaseTemperature Dew Point Pressure (QNH)
2 knots direction variable
10 km or above
No significant weather
1 to 2 oktas
3 to 4 oktas
3500 feet
4500 feet
17 oC
6 oC
1018 hPa

Next Two Hours ChangeWindWeather
Becoming10 knots from 100 degrees (E)No significant weather

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: Sat, Jan 02 2021