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Wales weather in August 2025
Expect 68°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Wales in August. Check more long-term weather averages for Wales in August before you book your next holiday to Wales in 2025/2026.
- 68°F max day temperature
68 - 6 hours of sunshine per day
- 15 days with some rainfall
15 - 54°F min night temperature
54 - 15 hours of daylight per day
15 - No heat & humidity
0 - 3.2 inches of monthly rainfall
3.2 - 6 (High) UV index
6 - 64°F sea temperature
64
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The August weather guide for Wales (Cardiff) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Wales destinations
Below are average maximum temperatures at popular countries, regions and places in Wales in August. Select a holiday destination to see more weather parameters.
All Wales regions
All Wales destinations
- Aberaeron
- Abergavenny
- Aberystwyth
- Bangor
- Barmouth
- Betws-y-Coed
- Brecon
- Builth Wells
- Caernarfon
- Camarthen
- Cardiff
- Chepstow
- Colwyn Bay
- Cowbridge
- Fishguard
- Gower Peninsula
- Haverfordwest
- Hay-on-Wye
- Holyhead
- Lake Vyrnwy
- Llangollen
- Machynlleth
- Monmouth
- Pembroke
- Porthcawl
- Porthmadog
- Pwllheli
- Rhayader
- Rhyl
- St Davids
- Swansea
- Tenby
- Welshpool
- Wrexham
Metric (°C) | Imperial (°F)
More about Wales
How hot is it in Wales in August?
Daytime temperatures usually reach 68°F in Cardiff, Wales in August, falling to 54°F at night.
How sunny is it in Wales in August?
There are normally 6 hours of bright sunshine each day in Cardiff, Wales in August - that's 41% of daylight hours.
How warm is the sea around Wales in August?
The average sea temperature around Cardiff, Wales in August is 64°F.
Does it rain in Wales in August?
There are usually 15 days with some rain in Cardiff, Wales in August and the average monthly rainfall is 3.2 inches.
Wales August sunrise & sunset times
Browse the sunrise and sunset times for Wales in August 2025. Select a month to view Wales sunrise and sunset times for the next 12 months. The Wales sunrise and sunset times shown below are for Cardiff.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Friday, 1st August 2025 | 04:37 | 20:00 |
| Saturday, 16th August 2025 | 05:00 | 19:33 |
| Sunday, 31st August 2025 | 05:24 | 19:01 |
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