Portmarnock Weather and Climate: A Comprehensive Guide
Temperatures see a moderate degree of fluctuation,
transitioning from pleasant conditions
to cold.
It receives a moderate amount of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average maximum day and minimum night temperature
The weather in Portmarnock changes moderately throughout the year, offering enough variation to appreciate each season. On average, daytime temperatures range from a pleasant 19°C in July to a chilly 10°C in February.
Nighttime temperatures can drop, with average lows reaching 4°C in February. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Generally, Portmarnock experiences moderate precipitation patterns, averaging 934 mm yearly. The wettest period in Portmarnock occurs in November, which receives around 98 mm of precipitation. During the driest month, March, Portmarnock experiences moderate rainfall, totaling approximately 64 mm. The consistent precipitation levels throughout the year contribute to a relatively stable climate.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Portmarnock, summer days are longer and more sunny, with daily sunshine hours peaking at 6.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.7 hours per average day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year ranges from 8°C in March to 15°C in August.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in Portmarnock.
The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 4 m/s and 6 m/s throughout the year. It is lowest in May, June, July, August and September and highest during January, February, March and December.
The mean monthly wind speed over the year (meters per second)
clear and no rain partly cloudy and no rain partly cloudy and no rainForecast for Portmarnock
3 m/s
6 m/s
5 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Portmarnock in Ireland
Other facts from our historical weather data:July has an average maximum temperature of 19°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 10°C.
November tops the wettest month list with 98 mm of rainfall.
March is the driest month with 64 mm of precipitation.
May is the sunniest month with an average of 188 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
