Cool
Average highs are around 17°C, so pack for cooler days.
Weather Guide
Isle of Man Average Monthly Weather
Weather score21Poor annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 11°C, sunshine averages 4h per day, and rainfall totals about 1304mm. Sea temperatures average 11°C across the year.
Annual weather
Annual averages
Temp
11°C
Rain
1304mm
Annual total
Sun
4h
Sea
11°C
Weather score
21
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 78mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6h per day, enough for a balanced month.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare Isle of Man with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July17°C average high
July is one of Isle of Man's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July78mm average rain
July is one of Isle of Man's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsFebruary and April to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July6 hours average sun
July is brighter than Isle of Man's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July14°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
July36 weather score
July is one of Isle of Man's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsMay to August
These months have the strongest weather score in the monthly averages.