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    Changeable conditions - A more unsettled week after the heatwave

22:17
18 August 2026

Changeable conditions
A more unsettled week after the heatwave

Satellite weather map for Tuesday 18.08 showing widespread rain and showers across the UK and Ireland, with temperatures of 17°C in Dublin and Glasgow and 22°C near London.
Low pressure brings scattered showers on Tuesday.

Temperatures dip back to more manageable levels for many of us this week with a return of slightly more unsettled and changeable conditions.

A low pressure system to the west of Scotland becomes influential on Tuesday with frontal rain moving through the south and south-east of England in the morning. This is followed by brighter spells and scattered showers as temperatures hover around average for the time of year amid breezy winds.

Wednesday sees the changeable conditions remain with a mix of sunny spells and scattered showers. Some of which could be heavy and potentially thundery across Scotland, Ireland, and north-western England. Still drier with light showers to the south and east of England where it is warmer again too.

From mid-week, the general outlook remains unsettled. Showers are a common sight on the WeatherRadar, still mixed with sunny spells as temperatures continue to rest around seasonal averages and more thundery showers on Thursday for eastern England.

Things do turn more settled into the weekend thanks to a ridge of high pressure which is building from the west.

Despite this, it stays rather cool with no signs of another heatwave this month and overnight temperatures even dropping to single digits for parts of Scotland, northern England, and southern Ireland by Friday.

London

We
17
24
Th
15
22
Fr
14
20
Sa
13
22
Su
14
22
Mo
14
22
Tu
15
23
We
17
25
Th
16
25
Fr
16
24
Sa
17
25
Su
16
24
Mo
16
24
Tu
16
25
Max (°C)
Min (°C)
moreless

Manchester

We
13
19
Th
13
17
Fr
10
17
Sa
9
18
Su
8
19
Mo
11
21
Tu
12
21
We
14
21
Th
13
21
Fr
13
21
Sa
13
22
Su
11
19
Mo
12
20
Tu
12
20
Max (°C)
Min (°C)
moreless

Dublin

We
13
19
Th
13
17
Fr
9
17
Sa
7
18
Su
8
18
Mo
9
19
Tu
12
21
We
12
19
Th
11
20
Fr
13
21
Sa
11
20
Su
10
19
Mo
11
19
Tu
10
19
Max (°C)
Min (°C)
moreless

Edinburgh

We
12
18
Th
12
16
Fr
9
16
Sa
8
17
Su
9
17
Mo
10
19
Tu
10
19
We
12
19
Th
11
19
Fr
12
20
Sa
12
20
Su
11
19
Mo
12
19
Tu
12
20
Max (°C)
Min (°C)
moreless

Cardiff

We
15
22
Th
14
20
Fr
12
19
Sa
11
18
Su
9
21
Mo
12
21
Tu
14
22
We
15
21
Th
14
23
Fr
15
23
Sa
15
23
Su
14
21
Mo
14
22
Tu
14
22
Max (°C)
Min (°C)
moreless

Weather & Radar editorial team
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