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Met Office Forecasts Wales Warm Spell, Up to 23°C

By Drooid · Sep 20, 2026, 10:25 PM UTC · How we work

Summary

Met Office Warm Spell

The Met Office forecasts a final warm spell across Wales, reaching up to 23 °C on September 21.
Cardiff is expected to reach 21 °C, while Wrexham, Abergavenny and Hay-on-Wye may hit 23 °C Monday.
UK temperatures could rise into upper 20s by next week’s end as a heat dome pushes warm air north.

Summary

Forecasts Predict Mild Temperatures

Four forecast bulletins predict Friday’s high temperature between 18 °C and 19 °C.
Friday rain is forecast to begin at 8 pm in one bulletin and at 9 pm in the others.
Saturday’s maximum temperature forecasts range from 20 °C to 21 °C across the sources.
Sunday’s peak temperature is forecast at 20 °C in two bulletins and 21 °C in the others.
Sunday’s rain probability stays below 5 % in all bulletins.

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Met Office Warm Spell

The Met Office forecasts a final warm spell across Wales, reaching up to 23 °C on September 21.
Cardiff is expected to reach 21 °C, while Wrexham, Abergavenny and Hay-on-Wye may hit 23 °C Monday.
UK temperatures could rise into upper 20s by next week’s end as a heat dome pushes warm air north.

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