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.

Thursday
10th Sep
17

12

1

1
Friday
11th Sep
17

13

7

3
Saturday
12th Sep
19

14

1

2
Sunday
13th Sep
19

16

3

3
Monday
14th Sep
20

17

3

3

5-day weather forecast updated at 04:03 on Thursday 10th September 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 Thursday 10th September 2026

Expect mostly cloudy with light rain in Caernarfon, Wales with a maximum temperature of 17°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 98% chance of some rain and a fresh breeze of 33 kph from the south.

17
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
1
UV index (Low)
98
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
33
kph wind from S

Caernarfon weather for Friday 11th September 2026

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

17
°C maximum temperature
13
°C minimum temperature
broken clouds
7
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from W

Caernarfon weather for Saturday 12th September 2026

Expect mostly cloudy with rain in Caernarfon, Wales with a maximum temperature of 19°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 85% chance of some rain and a fresh breeze of 35 kph from the south.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
2
UV index (Low)
85
% chance of some rain
<10
mm of rainfall expected
19
°C wind chill
35
kph wind from S

Caernarfon weather for Sunday 13th September 2026

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.

19
°C maximum temperature
16
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
16
kph wind from SW

Caernarfon weather for Monday 14th September 2026

Expect mostly cloudy with rain in Caernarfon, Wales with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 27 kph from the south-west.