The hottest month in Swansea is typically July, with daytime highs averaging around 19.8°C (68°F), based on 10 years of historical weather data. Overnight lows during this period average near 13.5°C (56°F).

What is the coldest month in Swansea?

The coldest month in Swansea is typically January, with overnight lows averaging around 3.3°C (38°F) and daytime highs near 8°C (46°F), based on 10 years of historical weather data.

Does Swansea have a rainy season?

Swansea doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. December is the wettest month on average (about 191 mm), while April is the driest (about 77 mm).

What's the best time of year to visit Swansea?

The best time to visit Swansea is typically June to August, when daytime highs average a comfortable 19.2°C (67°F). Rainfall during this window averages around 108 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is Swansea's air quality safe right now?

As of the latest reading, Swansea's air quality index (AQI) is 13, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

10 km/h

SSW · Light Breeze · Max 28 km/h

Humidity

93 %

High · feels muggy

UV Index

Moderate

Visibility

10 km

Excellent

Pressure

1016 hPa

Stable

Dew Point

15°C

Somewhat humid

Today vs Normal

18°C0° below normal

The long-term average high for today is 18°C.

Air Quality

Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Health & Activity Advice

✅ Good for Outdoors

UV index is 3 today — low. Minimal sun protection is needed for most outdoor activity.

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Conditions are comfortable for outdoor activity at most points during the day today.