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Samuel Beckett Bridge over the River Liffey at sunset, Dublin

Dublin events & things to do in September 2026

Start with Phoenix Park, Trinity College and Book of Kells, plus Guinness Storehouse. September in Dublin averages 17°C / 63°F highs, 9°C / 48°F nights, and about 10 rainy days.

Expect 17°C/63°F days and about 10 rainy ones in September. Start with these:

  • Phoenix Park★ 4.7 · 41.6k reviewsThe 707-hectare park dates to the 1660s and holds Dublin Zoo, the Papal Cross, Wellington Monument, deer herds, and the Irish president's residence.
  • Trinity College and Book of Kells★ 4.4 · 19.0k reviewsTrinity College was founded in 1592, and the Old Library holds the Book of Kells, Long Room, manuscripts, and university history.
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By TripSapien Research · Updated June 3, 2026

Dublin in September 2026

Weather

Temp

63°F / 48°F

17°C / 9.1°C

Rain

10d

2.4in · 60mm

Light

12.4h

Sea

58.3°F

14.6°C

September is shoulder season, good for university-area walks and coastal trips after school-holiday demand eases.

Events & festivals

Event calendar
Show all 39 events for September

About Dublin

City overview

Dublin sits on the River Liffey where Georgian squares, Viking-medieval lanes, literary pubs, Trinity College, the Liberties, Temple Bar, Smithfield, and St Stephen's Green make a compact city-center route. The city works best on foot, with DART coastal trains and Luas trams extending the map to Howth, Dun Laoghaire, and the docklands.

Food & drink

Dublin food is pub, market, and coast-fed: a full Irish breakfast plates sausage, bacon, eggs, pudding, beans, and tomato, Irish stew slow-cooks lamb or mutton with potatoes, seafood chowder uses Atlantic shellfish, and boxty turns potato into pancakes. The Brazen Head, Moore Street, George's Street Arcade, Temple Bar Food Market, Capel Street, and Howth seafood stops add soda bread, fish and chips, oysters, and Guinness pours.

Top sights

Ranked for September suitability using weather, setting, ratings, and review volume.

Map of Dublin with pinned top attractions (1 through 8)
  1. 1Guinness Storehouse
  2. 2Dublin Castle
  3. 3Kilmainham Gaol
  4. 4National Museum of Ireland - Archaeology
  5. 5EPIC The Irish Emigration Museum
  6. 6Christ Church Cathedral
  7. 7St Patrick's Cathedral
  8. 8Temple Bar
  • Guinness Storehouse in Dublin1

    Guinness Storehouse

    4.4★outdoorOpen daily

    The St James's Gate visitor experience opened in a former fermentation plant and explains brewing, advertising, cooperage, and Guinness history. The Gravity Bar gives rooftop views over the Liberties.

    Wikipedia
  • Dublin Castle in Dublin2

    Dublin Castle

    4.3★outdoorOpen daily

    The castle developed from a 13th-century Anglo-Norman fortress into British administrative buildings and Irish state rooms. It sits above the old Dubh Linn garden near Dame Street.

    Wikipedia
  • Kilmainham Gaol in Dublin3

    Kilmainham Gaol

    4.7★indoorOpen daily

    The jail opened in 1796 and is tied to Irish nationalist prisoners, the 1916 Rising executions, and penal history. It is west of the center near the Irish Museum of Modern Art.

    Wikipedia
Show 3 more sights
  • 4National Museum of Ireland - Archaeology
  • 5EPIC The Irish Emigration Museum
  • 6Christ Church Cathedral

Neighborhoods

Explore Dublin neighborhoods in depth

Day trips

  • 15km / 30-45min by DART from Tara Street or Connolly

    Howth

    The fishing village has cliff walks, seafood, harbor seals, Howth Castle grounds, and views back to Dublin Bay.

  • 60km / 1.5h by bus tour or car from Dublin

    Glendalough and Wicklow Mountains

    The monastic valley has round towers, lakes, trails, and mountain scenery; public transport is limited, so tours are common.

  • 15km / 25-30min by DART from Connolly

    Malahide Castle

    The castle, gardens, village streets, marina, and coastal walks make a light northside day.

Getting around

Dublin Bus, Luas trams, DART coastal rail, commuter rail, and Leap cards cover the useful visitor network. Walk the center, use Luas for Heuston-Smithfield-Docklands, and use DART for Howth, Malahide, and Dun Laoghaire.

Planning a Dublin trip?

Add your dates and we'll check every place for closures, limited hours, and booking needs in September.

Common questions about Dublin in September

What to pack for Dublin in September

Pack for September's weather, not a generic Dublin checklist.

  • Layerable daytime clothes for average highs around 17°C / 63°F.
  • A light evening layer because nights average 9°C / 48°F.
  • Compact rain gear and shoes that handle wet pavement across about 10 rainy days.
How many days do you need in Dublin
4 days covers the main Dublin highlights at a realistic pace. Add 3 extra days if you want the listed day trips.
Is Dublin worth visiting in September
Yes. September in Dublin averages 17°C / 63°F highs, 9°C / 48°F nights, and about 10 rainy days.

Ready to plan Dublin?

You've seen what's on — now get a day-by-day Dublin plan for September 2026, every place checked for your exact dates.

Dublin city guide

Things to do in DublinBest time to visit DublinDublin festivals 2026 & 2027

Events in Dublin

Dublin events in September 2026

Other months in Dublin

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