Weather

Cornwall weather: Sunday 9 August, 29°C with hotter days to come

Published On: 9 August 2026Last Updated: 9 August 2026By

If you have been waiting for a proper stretch of summer, this looks like your week. Cornwall opens with a sunny 29°C, holds onto the warmth overnight, and then the regional forecast for South West England has the temperature climbing again by midweek. Here is how the next few days shape up.

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Today

A dry and sunny day across the region, though the sunshine may turn rather hazy at times. It will feel very warm in the sun with only light winds to take the edge off. The maximum temperature is 29°C, so it is one to make the most of if you are heading for the coast or the garden.

Tonight

The evening stays dry and fine with plenty of late sunshine to see the day out. Overnight, some cloud will build, especially across the north and west of the region. It stays a rather warm night with the minimum temperature holding at 15°C, so sleeping with a window open may be the plan.

Monday

A bright start, but skies turn rather cloudy through the morning. It stays dry throughout, and the sunshine returns later in the day. It will feel a little cooler than Sunday, though still warm, with a maximum of 26°C.

Your daily dose of Cornwall

News, events and goings on across the Duchy

Tuesday to Thursday

The next few days stay dry with plenty of sunshine, and the temperature turns hotter as the week goes on. From midweek it becomes increasingly humid, with light winds keeping the air still. That mix of heat and humidity is what builds towards the end of the forecast, and it is worth keeping an eye on how uncomfortable the nights start to feel.

CornishStuff weather forecast graphic showing lightning, cloud and sunshine over Cornwall

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