Porthmadog weather live forecast

Today's maximum temperature in Porthmadog is expected to be 16°C. Select a day from the live weather forecast for Porthmadog, Wales, UK for more weather parameters.

Friday
11th Sep
16

11

8

3
Saturday
12th Sep
18

12

0

2
Sunday
13th Sep
18

15

3

3
Monday
14th Sep
20

16

2

4
Tuesday
15th Sep
19

14

3

1

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 (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 Friday 11th September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

16
°C maximum temperature
11
°C minimum temperature
broken clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from NW

Porthmadog weather for Saturday 12th September 2026

Expect cloudy with some rain in Porthmadog, Wales with a maximum temperature of 18°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 93% chance of some rain and a fresh breeze of 33 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
cloudy with some rain
0
hours of sunshine
2
UV index (Low)
93
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
33
kph wind from SW

Porthmadog weather for Sunday 13th September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south-west.

18
°C maximum temperature
15
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from SW

Porthmadog weather for Monday 14th September 2026

Expect mostly cloudy with rain in Porthmadog, Wales with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 51% chance of some rain and a moderate breeze of 28 kph from the south-west.

20
°C maximum temperature
16
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
4
UV index (Moderate)
51
% chance of some rain
<10
mm of rainfall expected
20
°C wind chill
28
kph wind from SW

Porthmadog weather for Tuesday 15th September 2026

Expect broken clouds in Porthmadog, Wales with a maximum temperature of 19°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the west.