Which is the warmest month in Achill Island?

The warmest time of year in Achill Island is normally July. Expect maximum daytime temperatures to reach 17°C.

Which month has the most rain in Achill Island?

In terms of rainfall, January is usually the wettest month in Achill Island with 141mm on average. There are normally 23 days in January with some rain.

When is it sunniest in Achill Island?

The sunniest time of year in Achill Island is normally May with bright sunshine on average for 37% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Achill Island?

The sea is usually at its warmest in Achill Island in August when the water temperature reaches 15°C.

Best time to visit Achill Island

Q: When is the best time to visit Achill Island?

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

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

Achill Island by month

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

Recommended for Ireland

Rural Retreats: Group holiday cottages

Sale

Explore cottages in the UK for groups
Enjoy a range of facilities & activities
Filter search by selecting holiday preferences

Go to Rural Retreats deal >>

View all Rural Retreats offers

When is the best time to visit Achill Island?

The best time to visit Achill Island is May 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
1.5
Jun
0.5
Jul
0.5
Aug
0.5
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Hours of Sunshine (daily)

2
Jan
2
Feb
3
Mar
5
Apr
6
May
5
Jun
4
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 Ireland (Achill Island) 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)