Best time to go

Dún Laoghaire in October 2026: weather, temperatures and activities

Do you want to visit Dún Laoghaire in October 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether October is a good month to travel to Dún Laoghaire, Ireland.

Custom search

Is it worth visiting Dún Laoghaire in October?

Check your ideal travel criteria and see if the month of October suits your plans to go to Dún Laoghaire.
What matters most?
Dún Laoghaire in October 2026: weather, temperatures and activities

Page summary

Dún Laoghaire in October in summary
Fair weather
Min 10°C Max 14°C 123 mm 7 day(s) 87% 53% 15°C 6.6 h/day
Best activities in October
Cultural visits and heritageGastronomy
Practical guidelines
Moderate crowds 06:51 17:28
Hourly weather

Average weather in Dún Laoghaire in October 2026

Fair weather

The weather in Dún Laoghaire in October 2026 is based on statistical data from previous years in October. This allows you to forecast the weather in October 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

Loading hourly weather...
Loading hourly weather...
Loading hourly weather...
Climate

Climate of Dún Laoghaire in October

Temperatures, precipitation and monthly trends help to better understand the climate in Dún Laoghaire in October.

Temperatures and rain in Dún Laoghaire in October

Average daily weather

Temperatures and rain day by day in October.
Minimal Average Maximums Average rainfall

Monthly temperatures

The month of October is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Dún Laoghaire in October

Seasonal normals

Seasonal normals of Dún Laoghaire in October

Check the seasonal normals in Dún Laoghaire in October and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
October
Weather data September October November
Outside temperature
Average temperature 13.7°C 12.0°C 9.1°C
Maximum temperature 15.7°C 13.6°C 10.5°C
Minimum temperature 11.8°C 10.3°C 7.7°C
Record maximum temperature 21.0°C
(2016)
18.0°C
(2010)
18.0°C
(2021)
Record low temperature 5.0°C
(2010)
4.0°C
(2010)
-2.0°C
(2010)
Number of days at +30° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days at +18° 5 day(s)
(17%)
1 day(s)
(3%)
0 day(s)
(0%)
Number of days below 0° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Sea temperature
Sea temperature (average) 14.9°C 14.2°C 13.2°C
Sea temperature (minimum) 14.2°C 13.1°C 12.3°C
Sea temperature (maximum) 15.4°C 15.1°C 14.1°C
Wind
Wind speed 22 km/h 25 km/h 29 km/h
Wind temperature 10.0°C 7.9°C 4.4°C
Precipitation (rain)
Precipitation 88.8 mm 123.0 mm 123.5 mm
Number of days with precipitation 17 day(s)
(57%)
19 day(s)
(61%)
19 day(s)
(63%)
Number of days with significant precipitation (greater than 5 mm) 5 day(s)
(16%)
7 day(s)
(22%)
7 day(s)
(25%)
Record precipitation in one day 52.3 mm
(2010)
56.9 mm
(2011)
40.0 mm
(2017)
Other weather data
Humidity 89% 87% 86%
Visibility 9.1 km 9.2 km 9.2 km
Cloud cover 47% 53% 54%
UV index 4 3 3
Daily sunshine 11h 7h 6h
Sunrise and sunset
Sunrise time 05h59 06h51 07h50
Sunset time 18h40 17h28 16h28
Day length 12h41 10h37 8h38
Our opinion on the climate in October
The review of Where And When favourable weather fair weather adverse weather
Activities and events

What to do in Dún Laoghaire in October?

Best activities in October
Cultural visits and heritageGastronomy
Possible activities in October
Beach and swimmingHiking and trekkingNature and landscapesNightlifeBoat trip and cruise
Activities not recommended in October
Animal observation
Observed weather

What was the weather like in Dún Laoghaire in October last?

Find the observed weather calendar in Dún Laoghaire in October 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Clear/Sunny
14°C17°C1.3 mm
2
Patchy rain nearby
14°C16°C5.1 mm
3
Light drizzle
11°C17°C0.8 mm
4
Patchy rain nearby
8°C13°C1.5 mm
5
Cloudy
11°C14°C0.1 mm
6
Partly Cloudy
11°C17°C0.0 mm
7
Patchy rain nearby
13°C15°C0.2 mm
8
Clear/Sunny
8°C14°C0.0 mm
9
Clear/Sunny
10°C15°C0.0 mm
10
Clear/Sunny
9°C14°C0.0 mm
11
Clear/Sunny
9°C13°C0.0 mm
12
Partly Cloudy
10°C14°C0.0 mm
13
Partly Cloudy
11°C16°C0.0 mm
14
Cloudy
11°C15°C0.0 mm
15
Clear/Sunny
12°C14°C0.0 mm
16
Cloudy
9°C13°C0.0 mm
17
Clear/Sunny
9°C14°C0.0 mm
18
Patchy rain nearby
12°C13°C1.5 mm
19
Patchy rain nearby
13°C15°C4.0 mm
20
Light rain shower
12°C14°C1.7 mm
21
Patchy rain nearby
11°C13°C0.3 mm
22
Patchy rain nearby
7°C12°C0.5 mm
23
Patchy rain nearby
8°C11°C1.0 mm
24
Patchy rain nearby
8°C10°C0.9 mm
25
Patchy rain nearby
8°C10°C0.3 mm
26
Patchy rain nearby
7°C12°C0.1 mm
27
Patchy rain nearby
10°C12°C0.9 mm
28
Clear/Sunny
10°C12°C0.0 mm
29
Clear/Sunny
8°C11°C0.1 mm
30
Light drizzle
7°C13°C3.7 mm
31
Patchy rain nearby
12°C14°C1.7 mm
Nearby

Where to go near Dún Laoghaire in October?

Compare cities and destinations near Dún Laoghaire in October to find another travel stop, a nearby alternative or a logical continuation of your stay in Dún Laoghaire.

Loading...
Every month

Best time to visit Dún Laoghaire month by month

Compare the weather in Dún Laoghaire across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Dún Laoghaire in October: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

It's an average period, nothing special. Conditions are mediocre in Dún Laoghaire in October, which ranks this month 6th out of 12. The choice of region will make a real difference.

Expect an average of 14°C during the day and 10°C at night, with about 123 mm of precipitation spread over 7 rainy days.

The sea is only 14°C on average in October. Swimming is still possible, but it will be cool.

Expect about 6.6 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Cultural visits and heritage and Gastronomy. These are the ones for which the conditions on site are most favourable.

Visitor numbers are moderate: this month is in Moderate crowds, with an index of 50/100. It is often a good compromise between weather and tranquility.

If your dates are flexible, the most favorable months in Dún Laoghaire are: June, July, August and September. Compare them before finalizing your departure.
Top
Switch to imperial units?

Temperatures are shown in degrees Celsius and precipitation in millimetres. Based on your country of connection, °F and inches may be more familiar to you.