AI-generatedArklow at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 20°
- Warmest sea
- Sep · 15.4°
- Sunshine a year
- 1,580 h
- Rain a year
- 890 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 2 m
Climate in Arklow
Arklow has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 20 °C, while January is the coolest at 9 °C. With around 1,580 hours of sunshine a year, Arklow is rather dull; May is the sunniest month with 6.8 hours a day.
Holiday weather through the year
Best time to visit Arklow
The best time to visit Arklow is from May to September. The sea stays too cool for a classic beach holiday: even in September it only reaches 15.4 °C. For sightseeing, day trips and hiking, conditions are most comfortable in September. Rain is frequent in April and from October to January; the wettest month is October with 101 mm.
Arklow through the seasons
How the weather changes over the seasons, with averages for each.
Arklow in spring
Mar – May
Fair
- 11–16 °C by day
- Sea 9 °C
- 5.5 h of sun a day
- 37 rainy days in all
Arklow in summer
Jun – Aug
Good
- 18–20 °C by day
- Sea 14 °C
- 6.0 h of sun a day
- 39 rainy days in all
Arklow in autumn
Sep – Nov
Fair
- 11–18 °C by day
- Sea 14 °C
- 3.6 h of sun a day
- 38 rainy days in all
Arklow in winter
Dec – Feb
Poor
- 9 °C by day
- Sea 9 °C
- 2.2 h of sun a day
- 36 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Sep
15–28 °C and not too much rain
Rainy months
Apr, Oct – Jan
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Arklow for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
Where to go in OctoberSea temperature in October
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 9°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 12°
- Night, 23:00: about 11°
07:4818:32
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:27–08:36 · evening 17:45–18:53
- Blue hour
- Morning 07:14–07:27 · evening 18:53–19:07
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Arklow compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 16° at the start of the month to 13° at the end. The sea cools from 15° to 13°. The days get 2.0 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 16° | 13° |
| Night-time low | 10° | 7° |
| Sea | 15° | 13° |
| Daylight | 11.7 h | 9.7 h |
What is the weather like in Arklow in October?
In October, Arklow is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 14.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3.7 hours a day. Rain is frequent, with about 14 rainy days and 101 mm in total. All in all, October is a so-so month for a holiday in Arklow.
More details for October
- Daylight
- 10 h 44 min07:48 – 18:32
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 73 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1offset from UTC
How the score comes together
- Temperatureweight 50 %73 %
- Sunshineweight 20 %12 %
- Few rainy daysweight 30 %32 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Arklow
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
June has the better holiday weather in Arklow: score 74 against 49. In June, days are 3 °C warmer than in October. The sea is 2 °C cooler in June. June has 2 fewer rainy days. The sun shines 3 hours longer a day in June.
| Month | October | June |
|---|---|---|
| Holiday weather score | 49 | 74better |
| Daytime high | 15° | 18° |
| Night-time low | 9° | 10° |
| Sea | 14.3° | 12.7° |
| Sunshine | 3.7 h | 6.5 hbetter |
| Rainy days | 14 | 12better |
| Rainfall | 101 mm | 68 mmbetter |
Based on the climate averages 1996–2025.
Arklow month by month
The typical weather for every month at a glance.
18January9° · Sea 9° · 1.9 h
In January, Arklow is cold: daytime highs average 9 °C, and nights cool down to about 4 °C. The sea averages 9.0 °C – swimming is only for the hardy. The sun is scarce, with only about 1.9 hours a day. Rain is frequent, with about 12 rainy days and 74 mm in total. All in all, January is not an ideal month for a holiday in Arklow.
Arklow in January22February9° · Sea 8° · 2.9 h
In February, Arklow is cold: daytime highs average 9 °C, and nights cool down to about 4 °C. The sea averages 8.1 °C – swimming is only for the hardy. The sun is scarce, with only about 2.9 hours a day. Rain is frequent, with about 11 rainy days and 61 mm in total. All in all, February is not an ideal month for a holiday in Arklow.
Arklow in February33March11° · Sea 8° · 3.9 h
In March, Arklow is cool: daytime highs average 11 °C, and nights cool down to about 4 °C. The sea averages 8.1 °C – swimming is only for the hardy. The sun is scarce, with only about 3.9 hours a day. Rain is frequent, with about 11 rainy days and 61 mm in total. All in all, March is not an ideal month for a holiday in Arklow.
Arklow in March47April13° · Sea 9° · 5.7 h
In April, Arklow is cool: daytime highs average 13 °C, and nights cool down to about 6 °C. The sea averages 9.1 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 65 mm in total. All in all, April is a so-so month for a holiday in Arklow.
Arklow in April66May16° · Sea 11° · 6.8 h
In May, Arklow is cool: daytime highs average 16 °C, and nights cool down to about 8 °C. The sea averages 10.7 °C – swimming is only for the hardy. The sun shines for around 6.8 hours a day. Rain is frequent, with about 13 rainy days and 65 mm in total. All in all, May is a good month for a holiday in Arklow.
Arklow in May74June18° · Sea 13° · 6.5 h
In June, Arklow is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 12.7 °C – swimming is only for the hardy. The sun shines for around 6.5 hours a day. Rain is frequent, with about 12 rainy days and 68 mm in total. All in all, June is a good month for a holiday in Arklow.
Arklow in June69July20° · Sea 14° · 5.8 h
In July, Arklow is mild: daytime highs average 20 °C, and nights cool down to about 13 °C. The sea averages 14.2 °C – swimming is only for the hardy. Expect around 5.8 hours of sunshine a day. Rain is frequent, with about 14 rainy days and 71 mm in total. All in all, July is a good month for a holiday in Arklow.
Arklow in July70August20° · Sea 15° · 5.7 h
In August, Arklow is mild: daytime highs average 20 °C, and nights cool down to about 12 °C. The sea averages 15.3 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 76 mm in total. All in all, August is a good month for a holiday in Arklow.
Arklow in August70September18° · Sea 15° · 4.8 h
In September, Arklow is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 15.4 °C – swimming is only for the hardy. Expect around 4.8 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 72 mm in total. All in all, September is a good month for a holiday in Arklow.
Arklow in September49October15° · Sea 14° · 3.7 h
In October, Arklow is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 14.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3.7 hours a day. Rain is frequent, with about 14 rainy days and 101 mm in total. All in all, October is a so-so month for a holiday in Arklow.
Arklow in October29November11° · Sea 12° · 2.4 h
In November, Arklow is cool: daytime highs average 11 °C, and nights cool down to about 6 °C. The sea averages 12.4 °C – swimming is only for the hardy. The sun is scarce, with only about 2.4 hours a day. Rain is frequent, with about 13 rainy days and 93 mm in total. All in all, November is not an ideal month for a holiday in Arklow.
Arklow in November20December9° · Sea 11° · 1.7 h
In December, Arklow is cold: daytime highs average 9 °C, and nights cool down to about 4 °C. The sea averages 10.5 °C – swimming is only for the hardy. The sun is scarce, with only about 1.7 hours a day. Rain is frequent, with about 12 rainy days and 84 mm in total. All in all, December is not an ideal month for a holiday in Arklow.
Arklow in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Arklow
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
CoolOctober: nights around 9°. A duvet at night and a jumper for the evening.
The coolest nights are in February (4°), the warmest in July (13°). Nights fall below 8 °C on average from November to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 18 | 9° | 4° | 9.0° | 1.9 h | 12 | 74 |
| FebruaryFeb | 22 | 9° | 4° | 8.1° | 2.9 h | 11 | 61 |
| MarchMar | 33 | 11° | 4° | 8.1° | 3.9 h | 11 | 61 |
| AprilApr | 47 | 13° | 6° | 9.1° | 5.7 h | 13 | 65 |
| MayMay | 66 | 16° | 8° | 10.7° | 6.8 h | 13 | 65 |
| JuneJun | 74 | 18° | 10° | 12.7° | 6.5 h | 12 | 68 |
| JulyJul | 69 | 20° | 13° | 14.2° | 5.8 h | 14 | 71 |
| AugustAug | 70 | 20° | 12° | 15.3° | 5.7 h | 13 | 76 |
| SeptemberSep | 70 | 18° | 11° | 15.4° | 4.8 h | 11 | 72 |
| OctoberOct | 49 | 15° | 9° | 14.3° | 3.7 h | 14 | 101 |
| NovemberNov | 29 | 11° | 6° | 12.4° | 2.4 h | 13 | 93 |
| DecemberDec | 20 | 9° | 4° | 10.5° | 1.7 h | 12 | 84 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
52.79° N, 6.15° W · 2 m · Europe/Dublin
Sea temperature in Arklow
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 13.8 – 14.9 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Arklow ranges from 8.1 °C in February to 15.4 °C in September. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in September, while the air already peaks in July. From November to December the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in September, eight out of ten years were between 14.9 and 16.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.0° | 8.1° | 9.8° | cold |
| FebruaryFeb | 8.1° | 7.5° | 8.7° | cold |
| MarchMar | 8.1° | 7.3° | 8.8° | cold |
| AprilApr | 9.1° | 8.3° | 9.9° | cold |
| MayMay | 10.7° | 10.0° | 12.0° | cold |
| JuneJun | 12.7° | 12.0° | 13.7° | cold |
| JulyJul | 14.2° | 13.5° | 15.2° | cold |
| AugustAug | 15.3° | 14.7° | 16.0° | cold |
| SeptemberSep | 15.4° | 14.9° | 16.0° | cold |
| OctoberOct | 14.3° | 13.8° | 14.9° | cold |
| NovemberNov | 12.4° | 11.9° | 12.9° | cold |
| DecemberDec | 10.5° | 9.8° | 11.2° | cold |
Sunshine hours in Arklow
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 3.7 of 10.7 hours of daylight in Arklow, 35 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Arklow: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Arklow has about 14 rainy days with 101 mm of rain in total.
UV index in Arklow
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 2 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 7).
Minutes until sunburn in October
- Very fair skin
- about 75 min
- Fair skin
- about 95 min
- Light brown skin
- over 2 h
- Olive skin
- over 2 h
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Arklow
How breezy and how cloudy Arklow is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Arklow typically peaks at 25 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: all year except Jul.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 73 % of the sky over Arklow: mostly cloudy, with about 3.7 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Planning a trip to Arklow
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Arklow in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Arklow has its best school-holiday weather during the summer holidays (score 70) and its weakest during the Christmas holidays (score 19).
- 43
Easter holidays
Mar – Apr
Fair
- 12 °C by day
- Sea 9 °C
- 5.2 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 68
May half-term
May – Jun
Good
- 16 °C by day
- Sea 11 °C
- 6.7 h of sun a day
- 13 rainy days a month
- 70
Summer holidays
Jul – Aug
GoodBest holidays
- 20 °C by day
- Sea 15 °C
- 5.7 h of sun a day
- 13 rainy days a month
- 49
October half-term
Oct
Fair
- 15 °C by day
- Sea 14 °C
- 3.7 h of sun a day
- 14 rainy days a month
Keep in mind: Frequent rain
- 19
Christmas holidays
Dec – Jan
Poor
- 9 °C by day
- Sea 10 °C
- 1.8 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 420 km
- Time zone
- UTC+1
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Compare & alternatives
Arklow compared
Put Arklow side by side with another destination.
Arklow vs Wicklow
In October the holiday weather in Arklow and Wicklow is about equally good (score 49 vs 46). During the day Wicklow is 1 °C cooler than Arklow. The sea is about equally warm.
| in October | Arklow | Wicklow |
|---|---|---|
| Holiday weather score | 49 | 46 |
| Daytime high | 15° | 14° |
| Sea | 14° | 14° |
| Sunshine | 4 h | 4 h |
| Rainy days | 14 | 14 |
| Best time | May – Sep | May – Sep |
Through the year
Ireland in October: the best places
In October, Arklow ranks 1 among the 31 nearest destinations in this country.
- ArklowThis page15°14°49
- 2Enniscorthy14°48
- 3Skerries14°14°48
- 4Malahide14°14°47
- 5Clonmel15°47
- 6Wicklow14°14°46
- 7Maynooth14°46
- 8New Ross14°45
Near Arklow
Other destinations close by.
Places with a climate like Arklow
Destinations whose weather through the year is closest to Arklow's – good alternatives.
Frequently asked questions about Arklow
When is the best time to visit Arklow?
The best time to visit Arklow is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Arklow?
The sea temperature in Arklow ranges from 8.1 °C in February to 15.4 °C in September. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Arklow in October?
Only if you don't mind cold water: in October the sea averages just 14.3 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Arklow?
July is the warmest month, with average highs of 20 °C and nights around 13 °C. January is the coolest month at 9 °C.
When does it rain most in Arklow?
Rain is frequent in April and from October to January; the wettest month is October with 101 mm. The driest month is February with 61 mm.
How many hours of sunshine does Arklow get?
Arklow gets around 1,580 hours of sunshine a year. The sunniest month is May with 6.8 hours a day; in December there are 1.7 hours a day.
What time zone is Arklow in?
Arklow is on UTC+0 in January and UTC+1 in July.
Which school holidays are best for Arklow?
Arklow has its best school-holiday weather during the summer holidays (score 70) and its weakest during the Christmas holidays (score 19). Holiday ratings (0–100): Easter holidays 43, May half-term 68, summer holidays 70, October half-term 49, Christmas holidays 19.