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Dublin, Ireland · Temperate oceanic

Dublin in September: go or not?

Tough period. Dublin in September only reaches 4.3/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 53.35°N · 6.26°W
⚡ This month's verdict
Avoid
Dublin · September
4.3
11–17°
Temperature
46%
Rain
4h
Sun
🌊 Seaside☀️ Bright🍴 Gastronomy
Photo : Hamed Alayoub via Unsplash
The month in detail

What to expect in September

Autumn marks the end of peak season in Dublin. Temperatures drop (17.0°F) and rain returns (46.0% of days). With 46.0% of rainy days, always have indoor alternatives planned.

September ranks 4 out of 12 months in Dublin. Compared to August: −4°F daytime, −0.7h of sun per day.

This month's conditions

What it's like in September

UV index
2 · low
no protection needed
Feels like
comfortable
11°
Sea
17°C
cold, for the brave
Daylight
12.4h of daylight
Air quality
good
AQI 25
Compare

Is September the right month?

The best month in Dublin is July (4.5/10), 0.2 pt higher than September.

See July →See all 12 months →
Context

Our verdict

Dublin has a very wet oceanic climate: it rains 1 day in 3 all year. June-August are my favorite months (7.2-7.3/10): 55-66°F, 45-48% rain, 17h days, festivals (Bloomsday on 16 June, Dublin Pride in June).

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Dublin
Expedia →
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · Dublin

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.

Country · Ireland

🗣️LanguageEnglish
💶CurrencyEuro (€)
🚗DrivingLeft-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTemperate oceanic
📈Climate trend ⓘ+1.82°F/decade
🔥Hottest monthJuly · 66°F
❄️Coolest monthJanuary · 46°F
🌧️Rainiest month ⓘFebruary · 48%

🏖️ Beach trip

📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore

Other destinations in September

If September doesn't convince you for this destination, compare with others.

Similar climate
EdinburghScotlandYorkUnited KingdomCotswoldsUnited KingdomBathUnited KingdomAmsterdamNetherlands
Nearby
Wild Atlantic WayIreland216 kmLake DistrictUnited Kingdom242 kmIsle of SkyeUnited Kingdom436 kmLondonUnited Kingdom463 km
Other top picks
Cape VerdeCape Verde5.3SalCape Verde5.6Marsa AlamEgypt5.8Sharm el-SheikhEgypt5.8HurghadaEgypt5.9
← AugustOctober →
🗺️ See all 754 destinations on the map
Location

Where is Dublin ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Ireland
Temperate oceanic climate with a 4.5 → 0.8 gap between best and worst month. 10 years of ERA5 data to choose by project.
53.35°N · 6.26°W
Questions

Frequently asked questions

What is the best time to visit Dublin?
August is the best month with 66°F highs, 55°F lows, 5.0h of sunshine and 45.0% rainy days.
How many hours of sunshine does Dublin get in August?
Dublin averages 5.0 sunshine hours per day in August. It is the sunniest month with a climate score of 4.3/10.
What is the rainiest month in Dublin?
December is the most unfavourable month with December has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Dublin in August?
In August, overnight lows reach 55°F, while afternoon highs average 66°F.
Is Dublin good in winter?
In winter (December-February), Dublin scores 0.9/10 on average — Difficult period — prefer the peak season.. The best month overall remains August with a score of 4.3/10.
When should you avoid Dublin?
December is the most difficult month to visit Dublin, with December has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Dublin in September?
In September, the sea averages 63°F in Dublin: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in Dublin in September?
The average UV index reaches 2 in September in Dublin (low), with about 12.4h of daylight. No protection needed.