When is the best time to go to Portmarnock

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The chart above shows the best time of year to visit Portmarnock, Ireland. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.

Average temperatures in Portmarnock

Portmarnock weather by month

Please note our recommendations for when to visit Portmarnock are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.

January

Portmarnock January weather averages
Temp Rain Sunshine Day length Sea temp
7°C 81mm 2.1hrs 9.5hrs 9°C

The climate in Portmarnock during January can be summarized as cool and a little damp.

Based on weather alone, this is probably a time of year to avoid going to Portmarnock for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.

January is in the winter in Portmarnock and is typically the coldest month of the year. Daytime maximum temperatures average around a cold 8°C (46°F), whilst at night 2°C (36°F) is normal.

On average January is the driest month of the year in Portmarnock with around 81mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.1 hours of sunshine per day.

Portmarnock weather in January »

February

Portmarnock February weather averages
Temp Rain Sunshine Day length Sea temp
7°C 63mm 2.8hrs 11.1hrs 8°C

February in Portmarnock is generally reasonably dry with the temperature being cool.

Based on weather alone, this is probably a time of year to avoid going to Portmarnock for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.

February is in the winter in Portmarnock and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cold 8°C (46°F), whilst at night 2°C (36°F) is normal.

On average February is the 2nd driest month of the year in Portmarnock with around 63mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.8 hours of sunshine per day.

Portmarnock weather in February »

March

Portmarnock March weather averages
Temp Rain Sunshine Day length Sea temp
9°C 64mm 3.9hrs 12.9hrs 8°C

The weather in March in Portmarnock is characteristically cool and reasonably dry.

Based on weather alone, this is probably a time of year to avoid going to Portmarnock for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.

March is in the spring in Portmarnock and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 10°C (49°F), whilst at night 3°C (37°F) is normal.

On average March is the 3rd driest month of the year in Portmarnock with around 64mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.

On the flip side this corresponds to an average of 3.9 hours of sunshine per day.

Portmarnock weather in March »

April

Portmarnock April weather averages
Temp Rain Sunshine Day length Sea temp
10°C 55mm 5.6hrs 15.2hrs 9°C

Portmarnock's weather in April is typically cool and reasonably dry in nature.

It is perhaps a good month to visit Portmarnock, with some very good weather at this time of year.

April is in the spring in Portmarnock and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 11°C (53°F), whilst at night 4°C (40°F) is normal.

On average April is the 4th driest month of the year in Portmarnock with around 55mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.6 hours of sunshine per day.

Portmarnock weather in April »

May

Portmarnock May weather averages
Temp Rain Sunshine Day length Sea temp
13°C 65mm 6.6hrs 17.3hrs 10°C

May is a reasonably dry month in Portmarnock and the temperature is generally mild.

Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it an okay time to visit Portmarnock.

May is in the spring in Portmarnock and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cool 14°C (58°F), whilst at night 7°C (44°F) is normal.

On average May is the 5th driest month of the year in Portmarnock with around 65mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.6 hours of sunshine per day.

Portmarnock weather in May »

June

Portmarnock June weather averages
Temp Rain Sunshine Day length Sea temp
16°C 59mm 6.6hrs 9.5hrs 13°C

Portmarnock's weather in June is typically mild and reasonably dry in nature.

It is perhaps the perfect month to visit Portmarnock, with some surprisingly good weather at this time of year.

June is in the summer in Portmarnock and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 17°C (63°F), whilst at night 9°C (49°F) is normal.

On average June is the 6th driest month of the year in Portmarnock with around 59mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.6 hours of sunshine per day.

Portmarnock weather in June »

July

Portmarnock July weather averages
Temp Rain Sunshine Day length Sea temp
17°C 56mm 5.9hrs 11.1hrs 15°C

July in Portmarnock is generally reasonably dry with the temperature being mild.

It is perhaps the perfect month to visit Portmarnock, with some extremely good weather at this time of year.

July is in the summer in Portmarnock and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 11°C (52°F) is normal.

On average July is the 6th wettest month of the year in Portmarnock with around 56mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.9 hours of sunshine per day.

Portmarnock weather in July »

August

Portmarnock August weather averages
Temp Rain Sunshine Day length Sea temp
17°C 75mm 5.6hrs 12.9hrs 16°C

The weather in August in Portmarnock is characteristically mild and reasonably dry.

It is perhaps a good month to visit Portmarnock, with some very good weather at this time of year.

August is in the summer in Portmarnock and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 11°C (52°F) is normal.

On average August is the 5th wettest month of the year in Portmarnock with around 75mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.6 hours of sunshine per day.

Portmarnock weather in August »

September

Portmarnock September weather averages
Temp Rain Sunshine Day length Sea temp
15°C 78mm 4.7hrs 15.2hrs 15°C

Portmarnock's weather in September is typically mild and reasonably dry in nature.

It is perhaps a good month to visit Portmarnock, with some particularly good weather at this time of year.

September is in the fall / autumn in Portmarnock and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 17°C (62°F), whilst at night 10°C (49°F) is normal.

On average September is the 4th wettest month of the year in Portmarnock with around 78mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 4.7 hours of sunshine per day.

Portmarnock weather in September »

October

Portmarnock October weather averages
Temp Rain Sunshine Day length Sea temp
12°C 82mm 3.5hrs 17.3hrs 14°C

October is a a little damp month in Portmarnock and the temperature is generally mild.

Although outside the main holiday season, there is still plenty of pretty acceptable weather around this time of year. This makes it an okay time to visit Portmarnock.

October is in the fall / autumn in Portmarnock and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 8°C (46°F) is normal.

On average October is the 3rd wettest month of the year in Portmarnock with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.

On the flip side this corresponds to an average of 3.5 hours of sunshine per day.

Portmarnock weather in October »

November

Portmarnock November weather averages
Temp Rain Sunshine Day length Sea temp
9°C 80mm 2.7hrs 9.5hrs 12°C

The climate in Portmarnock during November can be summarized as cool and a little damp.

Based on weather alone, this is probably a time of year to avoid going to Portmarnock for your holidays. The weather is often not a good and not conducive to spending time outdoors.

November is in the fall / autumn in Portmarnock and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 10°C (50°F), whilst at night 4°C (39°F) is normal.

On average November is the 2nd wettest month of the year in Portmarnock with around 80mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.7 hours of sunshine per day.

Portmarnock weather in November »

December

Portmarnock December weather averages
Temp Rain Sunshine Day length Sea temp
8°C 94mm 1.9hrs 11.1hrs 10°C

December in Portmarnock is generally a little damp with the temperature being cool.

Based on weather alone, this is probably a time of year to avoid going to Portmarnock for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.

December is in the winter in Portmarnock and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 8°C (47°F), whilst at night 3°C (38°F) is normal.

On average December is the wettest month of the year in Portmarnock with around 94mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.

On the flip side this corresponds to an average of 1.9 hours of sunshine per day.

Portmarnock weather in December »

Other monthly averages

UV index Best time to go?

Portmarnock weather stats

Portmarnock weather statistics
Hottest month: July 18.8°C 65.8°F
Driest month: April 55mm 2.2ins
Sunniest month: May 6.6hrs
Coldest month: February 7.4°C 45.3°F
Wettest month: December 94mm 3.7ins
Warmest sea: August 15.7°C 60.3°F
Map showing location of Portmarnock (53.42306, -6.1375) Portmarnock map pin © Google

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