Which is the hottest month in Porthmadog?

The hottest time of year in Porthmadog is normally July. Expect maximum daytime temperatures to reach 18°C.

Which month has the most rain in Porthmadog?

In terms of rainfall, December is usually the wettest month in Porthmadog with 202mm on average. There are normally 20 days in December with some rain.

When is it sunniest in Porthmadog?

The sunniest time of year in Porthmadog is normally May with bright sunshine on average for 38% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Porthmadog?

The sea is usually at its warmest in Porthmadog in August when the water temperature reaches 17°C.

Best time to visit Porthmadog

Q: When is the best time to visit Porthmadog?

The best time to visit Porthmadog is May and June based on the following average weather conditions. Daily hours of sunshine = 10 hours or more.

Find the best time to visit Porthmadog and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Porthmadog by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Wales

Parkdean Resorts: Current deals on Easter holidays

Sale

Book Easter 2026 holidays in the UK at Parkdean Resorts
Prices from £309 for 7 nights & £199 for 3 nights
Parks located across England, Scotland & Wales

Go to Parkdean Resorts deal >>

View all Parkdean Resorts offers

When is the best time to visit Porthmadog?

The best time to visit Porthmadog is May and June based on the following average weather conditions.

Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0
Jan
0
Feb
0
Mar
1.5
Apr
2.5
May
2.5
Jun
1.5
Jul
1.5
Aug
0.5
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Hours of Sunshine (daily)

1
Jan
2
Feb
3
Mar
5
Apr
6
May
6
Jun
5
Jul
5
Aug
4
Sep
3
Oct
2
Nov
1
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Wales (Porthmadog) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C) | Imperial (°F)