South Wales Weather Forecast
South Wales weather: 69°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
14-day forecast for South Wales
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Thu, Aug 27 | 🌧️ Rain | 78° / 66° | 100% · 0,3 in | 11 mph | 4 |
| Fri, Aug 28 | 🌧️ Rain | 69° / 64° | 69% · 0,3 in | 14 mph | 2 |
| Sat, Aug 29 | 🌧️ Rain | 67° / 63° | 100% · 0,6 in | 13 mph | 3 |
| Sun, Aug 30 | 🌧️ Showers | 69° / 60° | 98% · 0,5 in | 13 mph | 5 |
| Mon, Aug 31 | 🌧️ Heavy drizzle | 67° / 58° | 87% · 0,1 in | 15 mph | 5 |
| Tue, Sep 1 | 🌦️ Light drizzle | 66° / 54° | 51% · 0,0 in | 12 mph | 5 |
| Wed, Sep 2 | 🌦️ Light drizzle | 65° / 51° | 57% · 0,0 in | 12 mph | 5 |
| Thu, Sep 3 | 🌦️ Drizzle | 69° / 62° | 39% · 0,3 in | 16 mph | 2 |
| Fri, Sep 4 | 🌦️ Light drizzle | 70° / 64° | 32% · 0,1 in | 17 mph | 5 |
| Sat, Sep 5 | 🌦️ Drizzle | 71° / 58° | 24% · 0,1 in | 7 mph | 4 |
| Sun, Sep 6 | 🌦️ Drizzle | 67° / 57° | 25% · 0,1 in | 9 mph | 1 |
| Mon, Sep 7 | ☁️ Overcast | 66° / 48° | 20% | 9 mph | 1 |
| Tue, Sep 8 | ⛈️ Thunderstorm | 67° / 58° | 24% · 1,2 in | 19 mph | 3 |
| Wed, Sep 9 | ☁️ Overcast | 66° / 51° | 36% | 10 mph | 3 |
The two-week trend
Steady. The second week averages within a degree of the first, so no big change is signalled.
The window averages 68°F against a August normal of 70°F - right on average.
The next 7 days carry about 3.9 times a normal week's rain for August (2,0 in against 0,5 in).
What this means for South Wales
Today is warmer than average for August. The forecast high of 78°F is 8.1°F above the 70°F typical for this month.
A 100% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
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 - 7 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.
See the South Wales forecast by time range
South Wales weather - more answers
Explore South Wales
Every topic we hold for this place, and the same topic for the places around it.
Weather 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 69°F (21°C) with overcast. Humidity is 68% and wind is 9 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 2:00 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 27, 2026 at 2:00 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
