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Latest Message

(2023/09/26 21:20 HKT)

The review reports for tropical cyclones SAOLA and HAIKUI, which affected Hong Kong earlier this month, are now available here.

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

  • Prolonged heat alert! Please drink sufficient water. If feeling unwell, take rest or seek help immediately. If needed, seek medical advice as soon as possible.

    Issued at 06:45 HKT 01/Oct/2023


+Click to view very hot places

At 13:40 , the following places were very hot:
Ta Kwu Ling:33.0°CHK Observatory: 33.5°C
Tseung Kwan O:33.0°CHappy Valley: 33.7°C
Wetland Park:33.0°CPeng Chau: 33.8°C
Kowloon City:33.1°CSheung Shui: 33.8°C
Wong Tai Sin:33.1°CLau Fau Shan: 34.6°C
Pak Tam Chung:33.2°C

Tropical Cyclone Information [Details] [HKO link]

- Tropical Storm KOINU bulletin #2 (2023/09/30, 22:15 HKT)

Tropical Cyclone Track

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

Regional Weather of Hong Kong

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 01/10/2023 (Sunday):
Astro. Info
Sunrise:06:1403:590.78 m
Sunset:18:1110:442.23 m
Moonrise:19:3316:131.01 m
Moonset:07:5122:512.30 m

Planetary phenomena in the coming week:
Oct 01, 00:49 HKT: Moon Ascending Node
Oct 02, 11:16 HKT: Moon-Jupiter: 3.5° S
Oct 06, 04:31 HKT: Moon North Dec.: 28.3° N
Oct 06, 21:48 HKT: Last Quarter
(Source: NASA)

Weather at a Glance [Details] [HKO link]

Weather at a Glance Data as of 13:40 on 1/10/2023

33.5 C 61 % 1009.2 hPa
All measurements taken at Hong Kong Observatory
HKO Temp.:33.5 C
RH.: 61 %
Apparent Temp.:41.2 C (DANGER)
Dew Point:24.9 C
Temp. of today:33.7 / 28.0 C (Range 5.7 C)
Mean SLP.:1009.2 hPa
King's Park Wind:5 km/h (E)
Rain:0.0 mm (past 15 min)

Upper-Level Weather Information [Details]

Data as of 08:00 HKT on 1/10/2023 - Level of instability:

Delta P Values

At 2023/10/01 11 HKT: [Explanation] [Values for the past 10 days]

Delta p(972) = 3.2
Delta p(S) = 6.3

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

3-day Weather Forecast Data as of 11:30 HKT 01/Oct/2023

General Situation: The northeast monsoon will affect the coast of Guangdong tomorrow. An anticyclone aloft will bring mainly fine weather to southern China in the next couple of days, but showers and thunderstorms triggered by high temperatures will affect the region. Meanwhile, Tropical Cyclone Koinu will move towards the vicinity of the Luzon Strait to the southern part of Taiwan and intensify gradually. It may then enter the northeastern part of the South China Sea. The weather will be windier with showers over the coast of Guangdong in the latter part of this week. Besides, another surge of the northeast monsoon will reach southern China in the middle and latter parts of this week. Under the influence of the northeast monsoon, there are uncertainties in Koinu’s subsequent movement and intensity.

2/10 (Mon)

Sunny periods and one or two showers.

Mainly fine. Very hot during the day. Isolated showers later.

Sunny periods and a few showers. Very hot during the day.
Wind E force 4 to 5, occasionally force 6 offshore. E force 2 to 3, force 4 at first. Light winds force 2, N to NW force 3 to 4 later.
28 - 32 °C
28 - 33 °C
28 - 34 °C
65 - 90 %
60 - 85 %
55 - 85 %

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 13:30 HKT on 01 Oct 23

Original code: METAR VHHH 010530Z 22009KT 9999 FEW018 SCT035 33/25 Q1009 NOSIG=

Wind Visibility WeatherCloud AmountCloud BaseTemperature Dew Point Pressure (QNH)
9 knots from 220 degrees (SW)
10 km or above
No significant weather
1 to 2 oktas
3 to 4 oktas
1800 feet
3500 feet
33 oC
25 oC
1009 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: Mon, Jul 24 2023