Dublin at a glance
- Best time
- Jun – Sep
- Warmest month
- Jul · 18°
- Warmest sea
- Aug · 15.3°
- Sunshine a year
- 1,760 h
- Rain a year
- 797 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 17 m
Climate in Dublin
Dublin has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 18 °C, while January is the coolest at 8 °C. With around 1,760 hours of sunshine a year, Dublin is moderately sunny; May is the sunniest month with 7.0 hours a day.
Weather in October
Holiday weather in October
Fair
Best time to visit: June – September
What is the weather like in Dublin in October?
In October, Dublin is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 13.6 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 13 rainy days and 79 mm in total. All in all, October is a so-so month for a holiday in Dublin.
More details for October
- Daylight
- 10 h 42 min07:50 – 18:32
- UV index
- 2 · lowclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 24 km/haverage daily peak
- Cloud cover
- 73 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/Dublin
How the score comes together
- Temperatureweight 50 %55 %
- Sunshineweight 20 %15 %
- Few rainy daysweight 30 %39 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Dublin
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 13.1 – 14.1 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Dublin ranges from 8.1 °C in March to 15.3 °C in August. 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 August, while the air already peaks in July. From October to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 14.8 and 16.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.2° | 8.1° | 9.9° | cold |
| FebruaryFeb | 8.2° | 7.4° | 8.9° | cold |
| MarchMar | 8.1° | 7.1° | 8.9° | cold |
| AprilApr | 9.0° | 8.1° | 9.9° | cold |
| MayMay | 10.9° | 10.2° | 11.9° | cold |
| JuneJun | 13.3° | 12.4° | 14.4° | cold |
| JulyJul | 14.8° | 13.9° | 16.0° | cold |
| AugustAug | 15.3° | 14.8° | 16.0° | cold |
| SeptemberSep | 14.7° | 14.0° | 15.4° | cold |
| OctoberOct | 13.6° | 13.1° | 14.1° | cold |
| NovemberNov | 12.3° | 11.7° | 12.8° | cold |
| DecemberDec | 10.6° | 9.9° | 11.3° | cold |
Sunshine hours in Dublin
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 3.9 of 10.7 hours of daylight in Dublin, 36 % of the day.
Sunshine hours count the time with bright, direct sunshine (WMO definition, estimated from model data); daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Dublin: 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, Dublin has about 13 rainy days with 79 mm of rain in total.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
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 | 13 | 8° | 4° | 9.2° | 3.0 h | 12 | 62 |
| FebruaryFeb | 19 | 8° | 4° | 8.2° | 4.0 h | 11 | 52 |
| MarchMar | 28 | 10° | 5° | 8.1° | 5.0 h | 12 | 54 |
| AprilApr | 42 | 12° | 6° | 9.0° | 6.4 h | 12 | 59 |
| MayMay | 56 | 14° | 9° | 10.9° | 7.0 h | 13 | 61 |
| JuneJun | 69 | 17° | 11° | 13.3° | 6.6 h | 12 | 69 |
| JulyJul | 67 | 18° | 13° | 14.8° | 5.6 h | 14 | 72 |
| AugustAug | 69 | 18° | 13° | 15.3° | 5.3 h | 13 | 73 |
| SeptemberSep | 62 | 17° | 12° | 14.7° | 4.8 h | 12 | 67 |
| OctoberOct | 42 | 14° | 9° | 13.6° | 3.9 h | 13 | 79 |
| NovemberNov | 23 | 10° | 7° | 12.3° | 3.3 h | 13 | 80 |
| DecemberDec | 14 | 8° | 5° | 10.6° | 2.8 h | 12 | 70 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)
53.33° N, 6.25° W · 17 m · Europe/Dublin
Best time to visit Dublin
The best time to visit Dublin is from June to September. The sea stays too cool for a classic beach holiday: even in August it only reaches 15.3 °C. For sightseeing, day trips and hiking, conditions are most comfortable in September. Rain is most frequent from April to August and from October to January; the wettest month is November with 80 mm.
Find your perfect month
Tell us what you like and we rate every month in Dublin for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
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 – Aug, Oct – Jan
12 or more rainy days
Dublin month by month
The typical weather for every month at a glance.
13January8° · Sea 9° · 3 h
In January, Dublin is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 9.2 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 62 mm in total. All in all, January is not an ideal month for a holiday in Dublin.
Dublin in January19February8° · Sea 8° · 4 h
In February, Dublin is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 8.2 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 52 mm in total. All in all, February is not an ideal month for a holiday in Dublin.
Dublin in February28March10° · Sea 8° · 5 h
In March, Dublin is cold: daytime highs average 10 °C, and nights cool down to about 5 °C. The sea averages 8.1 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 54 mm in total. All in all, March is not an ideal month for a holiday in Dublin.
Dublin in March42April12° · Sea 9° · 6 h
In April, Dublin is cool: daytime highs average 12 °C, and nights cool down to about 6 °C. The sea averages 9.0 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 59 mm in total. All in all, April is a so-so month for a holiday in Dublin.
Dublin in April56May14° · Sea 11° · 7 h
In May, Dublin is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 10.9 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 13 rainy days and 61 mm in total. All in all, May is a so-so month for a holiday in Dublin.
Dublin in May69June17° · Sea 13° · 7 h
In June, Dublin is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 13.3 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 69 mm in total. All in all, June is a good month for a holiday in Dublin.
Dublin in June67July18° · Sea 15° · 6 h
In July, Dublin is mild: daytime highs average 18 °C, and nights cool down to about 13 °C. The sea averages 14.8 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. It rains often – on about 14 days, adding up to 72 mm. All in all, July is a good month for a holiday in Dublin.
Dublin in July69August18° · Sea 15° · 5 h
In August, Dublin is mild: daytime highs average 18 °C, and nights cool down to about 13 °C. The sea averages 15.3 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 73 mm in total. All in all, August is a good month for a holiday in Dublin.
Dublin in August62September17° · Sea 15° · 5 h
In September, Dublin is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 14.7 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 67 mm in total. All in all, September is a good month for a holiday in Dublin.
Dublin in September42October14° · Sea 14° · 4 h
In October, Dublin is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 13.6 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 13 rainy days and 79 mm in total. All in all, October is a so-so month for a holiday in Dublin.
Dublin in October23November10° · Sea 12° · 3 h
In November, Dublin is cool: daytime highs average 10 °C, and nights cool down to about 7 °C. The sea averages 12.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 13 rainy days and 80 mm in total. All in all, November is not an ideal month for a holiday in Dublin.
Dublin in November14December8° · Sea 11° · 3 h
In December, Dublin is cold: daytime highs average 8 °C, and nights cool down to about 5 °C. The sea averages 10.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 70 mm in total. All in all, December is not an ideal month for a holiday in Dublin.
Dublin in DecemberPlanning a trip to Dublin
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 440 km
- Time zone
- UTC+1
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Dublin
When is the best time to visit Dublin?
The best time to visit Dublin is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Dublin?
The sea temperature in Dublin ranges from 8.1 °C in March to 15.3 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Dublin in October?
Only if you don't mind cold water: in October the sea averages just 13.6 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Dublin?
July is the warmest month, with average highs of 18 °C and nights around 13 °C. January is the coolest month at 8 °C.
When does it rain most in Dublin?
Rain is most frequent from April to August and from October to January; the wettest month is November with 80 mm. The driest month is February with 52 mm.
How many hours of sunshine does Dublin get?
Dublin gets around 1,760 hours of sunshine a year. The sunniest month is May with 7.0 hours a day; in December there are 2.8 hours a day.
What time zone is Dublin in?
Dublin uses the time zone Europe/Dublin: UTC+0 in January and UTC+1 in July.
Near Dublin
Other destinations close by.