Cool
Average highs are around 17°C, so pack for cooler days.
Weather Guide
Achill Island, Ireland Average Monthly Weather
Weather score19Poor annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 12°C, sunshine averages 3.4h per day, and rainfall totals about 1251mm. Sea temperatures average 12°C across the year.
Annual weather
Annual averages
Temp
12°C
Rain
1251mm
Annual total
Sun
3.4h
Sea
12°C
Weather score
19
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 76mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.2h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Achill Island, Ireland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July17°C average high
July is one of Achill Island's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July76mm average rain
July sits on the drier side of Achill Island's year, which helps with sightseeing and transfers.
Driest monthsFebruary and April to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July4.2 hours average sun
July sits close to Achill Island's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July15°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
July29 weather score
July is one of Achill Island's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsApril to August
These months have the strongest weather score in the monthly averages.
