Climate and monthly weather forecast
Arklow, Ireland

Settled in Ireland, Arklow rests along the temperate Marine West Coast. The region's weather patterns echo the characteristics of the Köppen climate classification Cfb, suggesting warm summer marine west coast conditions dominate the year. The yearly weather includes mild variations, and seashore's influence is evidenced by the relatively constant sea temperatures, fluctuating from 8.5°C (47.3°F) to 15.3°C (59.5°F), which in turn impacts the land temperatures.

Rainfall is a constant companion in Arklow, with no particular months being completely dry. The gentle influence of the sea temperatures helps moderate the overall weather, offering a bit of warmth in winter and cooling breezes in summer. Daylight hours, on the other hand, follow a noticeable progression from 7.7 hours in December, peaking at 16.8 hours by June, before descending back to shorter days by year-end.

Seasoned tourists and casual visitors alike will feel most comfortable from June through August. These months offer the highest sea temperatures, ranging from 14.3°C (57.7°F) to 15.3°C (59.5°F), and longer daylight hours, extending from 15.8 to 16.8 hours per day, allowing ample time to experience Arklow's local attractions. The agreeable weather provides an excellent setting for outdoor activities without the discomfort of intense heat or cold.

Visitors seeking to sunbathe might feel discouraged between December and February due to the chillier sea temperatures, descending to 8.5°C (47.3°F), and the shorter daylight hours dropping to as little as 7.7 hours in December. The rather damp weather, coupled with fewer daylight hours, may restrict outdoor activities.

Transitioning from the colder winter, spring emerges gradually in Arklow. The sea temperatures start to warm up from 8.5°C (47.3°F) in March to 12.6°C (54.7°F) by May. Daylight hours also increase significantly, from 11.9 hours in March to 15.8 hours in May. The longer days and moderating temperatures offer a beautiful setting to enjoy the scenic beauty of Arklow.

Summers in Arklow present a delightful time. Sea temperatures peak, making it suitable for water-based activities. With sea temperatures increasing from 12.6°C (54.7°F) in June to 15.3°C (59.5°F) in August, swimming and other water attractions become quite engaging for visitors. Days are longest in summer, with 16.8 hours of daylight in June, gradually decreasing to 14.7 hours by August.

Following the enjoyable summers, autumn witnesses a gradual decrease in daytime and sea temperatures. Beginning with September's 15.3°C (59.5°F) sea temperature and 12.7 hours of daylight, the environment becomes significantly colder and darker by November, with the sea cooling down to 11.3°C (52.3°F) and daylight hours reduced to 8.7.

Coupled with colder conditions, winter in Arklow greets visitors with subdued daylight hours ranging from 8.3 in January to a minimum of 7.7 in December. Sea temperature, starting at 9.7°C (49.5°F) in December, lowers slightly to 8.5°C (47.3°F) by February. The maritime influence still ensures winter is not harsh, and a trip to Arklow in winter months provides a uniquely serene experience.

January in Arklow, Ireland commences the year with winter conditions, making it a cold month. The frigid air temperatures over the seas contribute to the coldest sea temperatures of the year at 9.7°C (49.5°F). While the days are shorter, stretching only to 8.3 hours of daylight, they often brim with crisp, clear skies. Weather in January »

In February, winter holds its grip on Arklow despite a slight elevation in sea temperatures from 9.7°C (49.5°F) to 8.8°C (47.8°F). Along with this minor improvement in sea temperature, the daylight hours extend to provide nearly an additional hour. Weather in February »

As spring emerges in March, Arklow residents experience an increase in daylight hours to 11.9 hours and a sea temperature of 8.5°C (47.3°F). The rise in hours of sunlight signals a slow return to outdoor activities despite sea temperatures that continue to linger in the chilly range. Weather in March »

In Arklow, April marks the transition from spring's cool beginnings to warmer temperatures. The longer hours of daylight reaching 14 hours and the noticeable hike in sea temperature from 8.5°C (47.3°F) in March to 9.3°C (48.7°F) all add to this change. Weather in April »

By May, the residents of Arklow start to enjoy substantial warming its sea, pushing up to 10.6°C (51.1°F). The daylight stretches to 15.8 hours, painting long, vibrant afternoons. The weather is often fair, with extended periods of sunshine and less cloud cover. Weather in May »

June arrives with the arrival of summer in Arklow, seeing the longest daylight hours of the year at 16.8 hours. Sea temperatures rise to a warm 12.6°C (54.7°F). June is often characterized by mild and stable weather, with long sunny days and warm, comfortable nights. Weather in June »

July exhibits the warmest sea temperatures in Arklow, achieving 14.3°C (57.7°F). Although the length of daylight slightly dips to 16.3, it remains one of the sunniest months. Weather is consistently sunny and dry, providing ideal conditions for water-based activities and tourism. Weather in July »

For Arklow, August continues the summer trend with sea temperatures reaching up to 15.2°C (59.4°F). The daylight duration reduces to 14.7 hours, hinting at the forthcoming autumn season. The weather remains generally dry and sunny, making August a preferred month for vacations and outdoor pursuits. Weather in August »

September sees a reduction in sea temperature to 15.3°C (59.5°F) in Arklow while experiencing comfortable weather. Reductions in daylight hours to 12.7 signal the arrival of autumn. Typically, the weather remains warm and dry with shorter evenings. Weather in September »

October in Arklow signifies the full onset of autumn, characterized by a dip in sea temperature to 14.3°C (57.7°F). The daylight hours continue to reduce to 10.6 in anticipation of winter. This month generally has cooler weather with a greater likelihood of showers compared to the summer months. Weather in October »

November brings in colder air over Arklow as it transitions into the winter phase. The sea temperature settles at a cooler 13.3°C (55.9°F). With just 8.7 hours of daylight, days become shorter. Unpredictable showers, cooler temperatures, and diminishing daylight define this pre-winter month. In Arklow, in November, the average water temperature is 13.3°C (55.9°F). Note: It is advised against swimming in 13.3°C (55.9°F) when it drops below 10°C (50°F). Weather in November »

December in Arklow, with its sea temperatures at 11.3°C (52.3°F) and 7.7 hours of daylight, brings the year to a close with the onset of winter. It's a cold month marked by shorter days and longer nights. Despite the cold, December has its charm, with Christmas celebrations lighting up the city against the backdrop of a winter landscape. Weather in December »