South Wales Climate and Average Weather
Climate of South Wales: average temperatures, rainfall and seasons month by month.
Climate in South Wales month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 46° | 36° | 5,5 in | ★★☆☆☆ |
| February | 49° | 41° | 6,2 in | ★★☆☆☆ |
| March | 54° | 40° | 3,5 in | ★★★☆☆ |
| April | 58° | 44° | 4,0 in | ★★★☆☆ |
| May | 65° | 50° | 3,8 in | ★★★★☆ |
| June | 68° | 54° | 3,6 in | ★★★★☆ |
| July | 73° | 57° | 2,3 in | ★★★★☆ |
| August | 70° | 56° | 2,2 in | ★★★★☆ |
| September | 65° | 53° | 5,9 in | ★★★☆☆ |
| October | 59° | 49° | 5,9 in | ★★★☆☆ |
| November | 52° | 43° | 5,2 in | ★★★☆☆ |
| December | 50° | 42° | 6,8 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Recent extremes in South Wales
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How South Wales compares with nearby places
Annual averages, and the difference against South Wales.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Bristol | 26 mi | 53°F | about the same | 42 in |
| Somerset | 28 mi | 54°F | +33°F warmer | 37 in |
| Bath | 36 mi | 52°F | 33°F cooler | 39 in |
| Devon | 55 mi | 53°F | about the same | 44 in |
| Stonehenge | 62 mi | 52°F | about the same | 37 in |
Climate by city in South Wales
1 cities mapped in this atlas
Best time to visit South Wales
Go in June, July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for South Wales
Today is warmer than average for August. The forecast high of 78°F is 7.6°F above the 70°F typical for this month.
A 55% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 57°F.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 6 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
South Wales is a county in Wales. South Wales is a county or metropolitan area in the United Kingdom. It has a population of about 1.9 million.
Right now it is 65°F (18°C) in South Wales with light drizzle. It feels like 66°F. Today runs from 65°F to 78°F. Chance of precipitation is 55%. Sightseeing conditions score 8.3/10 - good conditions.
The best time to visit South Wales is June, July and August. The climate is temperate. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 73°F, while January is the coldest with lows near 36°F.
The closest major airport is London Heathrow Airport (LHR), about 117 mi away. Nearby highlights include Stonehenge, Avebury and Associated Sites, Stonehenge, Snowdonia National Park and River Thames.
In plain terms. Today is warmer than average for August. The forecast high of 78°F is 7.6°F above the 70°F typical for this month. The best window to be outside is roughly 11 AM to 2 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in South Wales today at 9.4/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about South Wales
| Type | County |
|---|---|
| Region | Wales |
| Country | United Kingdom |
| Continent | Europe |
| Coordinates | 51°28′53.8″N 3°10′44.8″W (51.4816, -3.1791) |
| Population | 1.900.000 |
| Local time | 1:15 AM (UTC+01:00) |
| Best months | June, July and August |
| Climate | Temperate |
Weather map for South Wales
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore South Wales
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is South Wales?
South Wales is a county in Wales. Its coordinates are 51.4816, -3.1791. It lies in Europe.
What is the weather like in South Wales right now?
It is currently 65°F (18°C) with light drizzle. Humidity is 88% and wind is 6 mph.
When is the best time to visit South Wales?
June, July and August offer the most comfortable conditions in South Wales, which has a temperate climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is South Wales in?
South Wales observes Europe/London (UTC+01:00). The local time is 1:15 AM.
How many people live in South Wales?
South Wales has a population of approximately 1.9 million.
What is the nearest airport to South Wales?
The closest airports are London Heathrow Airport (LHR), 117 mi away, London Gatwick Airport (LGW), 131 mi away and Dublin Airport (DUB), 187 mi away.
What are the top things to do in South Wales?
Popular options include Stonehenge, Avebury and Associated Sites, Stonehenge, Snowdonia National Park, River Thames, British Museum and Big Ben and the Houses of Parliament.
What places are in South Wales?
South Wales covers 1 places in this atlas, including Cardiff.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (uk-regions) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 26, 2026 at 1:15 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
