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Royal Observatory Greenwich

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Royal Observatory Greenwich Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Royal Observatory Greenwich year round climate

  • Spring (March–May): Average 9–14°C, mild and rainy with occasional sunshine. Common activities: Visiting the Royal Observatory Greenwich, walking along the Thames. Suggested clothing: Light jacket, comfortable shoes.
  • Summer (June–August): Average 17–20°C, warm and pleasant, but occasional showers. Common activities: Picnics in Greenwich Park, exploring Greenwich town centre. Suggested clothing: Light trousers or skirt, T-shirt or shirt.
  • Autumn (September–November): Average 9–14°C, cool and damp with increased rainfall. Common activities: Visiting museums, enjoying afternoon tea indoors. Suggested clothing: Warm jacket, waterproof jacket, comfortable shoes.
  • Winter (December–February): Average 6–8°C, cold and damp with frequent rain or drizzle. Common activities: Visiting indoor attractions, enjoying London's Christmas atmosphere. Suggested clothing: Warm coat, scarf, hat, gloves.

Royal Observatory Greenwich climatological average

Annual average temperature: approx. 12.9°C / Annual rainfall: approx. 670 mm / Summer humidity: 65%–75% / Rainiest month: November

Royal Observatory Greenwich monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
6.3°C
38.7
February
8.5°C
55.2
March
9°C
68.8
April
10.6°C
52.2
May
14.5°C
49.9
June
17.7°C
31.4
July
19.5°C
50.1
August
19.9°C
40.9
September
17.1°C
67.7
October
14.1°C
78.1
November
9.6°C
83.9
December
7.5°C
53.1

Royal Observatory Greenwich weather for the next seven days

6/3
Wednesday
Patchy rain nearby
17.7°C/12°C
6/4
Thursday
Patchy rain nearby
17.9°C/12.9°C
6/5
Friday
Partly Cloudy
18.7°C/11.3°C
6/6
Saturday
Moderate rain
15.8°C/11.8°C
6/7
Sunday
Overcast
19.2°C/10.4°C
6/8
Monday
Patchy rain nearby
18°C/13.6°C
6/9
Tuesday
Partly Cloudy
18.8°C/10.8°C

Royal Observatory Greenwich Frequently Asked Questions and Useful Information for Travel

Is it worth visiting the Royal Observatory Greenwich?

The Royal Observatory Greenwich offers a unique experience with its historical significance and astronomical exhibits. While there is an entry fee, visitors interested in astronomy and history can easily spend an hour or more exploring the site. It's particularly recommended for those who want to stand on the Prime Meridian.

Is the Royal Observatory Greenwich free to enter?

Admission to the Astronomy Centre at the Royal Observatory Greenwich, which features modern astronomy galleries, is free. However, there are charges for planetarium shows and entry to specific historic buildings and exhibits. Planetarium tickets are priced separately.

What is the Royal Observatory Greenwich famous for?

The Royal Observatory Greenwich is world-renowned as the home of the Prime Meridian, the line of zero degrees longitude that divides the Earth into the Eastern and Western Hemispheres. This historic location has been instrumental in global timekeeping and navigation.

What activities can you enjoy at the Royal Observatory Greenwich?

At the Royal Observatory Greenwich, you can stand on the Prime Meridian, marvel at one of the UK's largest telescopes, and see the world-famous Harrison clocks. You can also visit Flamsteed House, learn about astronomy, and enjoy some of the best panoramic views of London.

What can I see and do at the Royal Observatory Greenwich?

The Royal Observatory Greenwich offers a captivating blend of science and history. Visitors can explore Flamsteed House, witness the iconic Prime Meridian Line, admire historic astronomical instruments, and enjoy breathtaking views across London. It provides an engaging experience for all ages.