Porthmadog weather live forecast

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

Saturday
19th Sep
17

14

3

2
Sunday
20th Sep
16

12

5

3
Monday
21st Sep
19

12

1

2
Tuesday
22nd Sep
20

15

4

2
Wednesday
23rd Sep
18

11

4

3

5-day weather forecast updated at 04:03 on Saturday 19th September 2026 GMT

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

Porthmadog weather forecast by day

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

Porthmadog weather for Saturday 19th September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 17°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 33 kph from the south-west.

17
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
33
kph wind from SW

Porthmadog weather for Sunday 20th September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

16
°C maximum temperature
12
°C minimum temperature
broken clouds
5
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
16
°C wind chill
20
kph wind from W

Porthmadog weather for Monday 21st September 2026

Expect mostly cloudy with light rain in Porthmadog, Wales with a maximum temperature of 19°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a light breeze of 12 kph from the south-west.

19
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
28
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Porthmadog weather for Tuesday 22nd September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 20°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south-west.

20
°C maximum temperature
15
°C minimum temperature
broken clouds
4
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from SW

Porthmadog weather for Wednesday 23rd September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north-west.