Caernarfon weather live forecast

Today's maximum temperature in Caernarfon is expected to be 17°C. Select a day from the live weather forecast for Caernarfon, Wales, UK for more weather parameters.

Friday
21st Aug
17

12

5

4
Saturday
22nd Aug
18

11

8

4
Sunday
23rd Aug
19

10

9

4
Monday
24th Aug
23

10

8

4
Tuesday
25th Aug
24

14

3

4

5-day weather forecast updated at 04:03 on Friday 21st August 2026 GMT

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The 5-day weather forecast for Wales (Caernarfon) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Caernarfon weather forecast by day

Below are the detailed weather forecasts for Caernarfon for the next 5 days.

Caernarfon weather for Friday 21st August 2026

Expect mostly cloudy with light rain in Caernarfon, Wales with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 71% chance of some rain and a gentle breeze of 17 kph from the north.

17
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
4
UV index (Moderate)
71
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
17
kph wind from N

Caernarfon weather for Saturday 22nd August 2026

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north.

18
°C maximum temperature
11
°C minimum temperature
broken clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from N

Caernarfon weather for Sunday 23rd August 2026

Expect scattered clouds in Caernarfon, Wales with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-east.

19
°C maximum temperature
10
°C minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from NE

Caernarfon weather for Monday 24th August 2026

Expect scattered clouds in Caernarfon, Wales with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the east.

23
°C maximum temperature
10
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
18
kph wind from E

Caernarfon weather for Tuesday 25th August 2026

Expect mostly cloudy with light rain in Caernarfon, Wales with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and a moderate breeze of 21 kph from the east.