Ireland in September is, in my opinion, hard to beat (and I’m basing that on living here for 33 years)
In fact, it’s up there as one of the best times to visit Ireland.
The days are still nice and long (the sun rises from 06:41 at the start of the month and sets at 20:14) and the weather in Ireland in September brings average highs of 13°C/55°F and average lows of 9°C/48°F.
However, spending September in Ireland does come with its pros and cons.
Below, you’ll discover things to do in Ireland in September, like the many festivals taking place, to what to expect from crowd levels and hotel prices.
Some quick need-to-knows before visiting Ireland in September
Although visiting Ireland in September is nice and straightforward, there are some need-to-knows that’ll make your visit that bit more enjoyable.
Below, you’ll find info on the weather in Ireland in September along with some handy info to get you up to speed.
1. The weather
The weather in Ireland in September, as is the case with every month in Ireland, can be unpredictable. Although this month tends to be good weather-wise, there have been exceptions.
2. Average temperatures
The average temperature in Ireland in September sees average highs of 13°C/55°F and average lows of 9°C/48°F.
3. Long days
At the beginning of the month, the sun rises at 06:41 and it sets at 20:14. This means you’ve around 12.5 hours of daylight to explore, which makes planning your Ireland itinerary much easier.
4. It’s the shoulder season
September is autumn in Ireland, which means the school year has resumed and many of the tourists that will have visited during peak season will have flown home.
5. Festivals and events
While there are endless things to do in Ireland in September, many flock to the various events and festivals in Ireland that run during this month, like Electric Picnic and the Dublin Theatre Festival.
Fast facts: The pros and cons of September in Ireland
There are some pros and cons (not many!) to visiting Ireland in September. However, unlike some months (I’m looking at you, January!), the pros greatly outweigh the cons.
Below, you’ll find the pros and cons from the perspective of someone that’s spent the last 32 Septembers in Ireland:
- Weather: We tend to have good weather in Ireland in September with average highs of 13°C/55°F and average lows of 9°C/48°F
- Long days: As we’re just out of summer, the days are still nice and long, with the sun rising at 06:41 and setting at 20:14 at the start of the month
- It’s quieter: The beauty of visiting just after summer is that you’ll still have good weather and places will be much quieter as peak-season is behind us
- Festivals: Loads of Irish music festivals and food, and cultural events take place (see our Irish festivals calendar)
- Prices: Flights and accommodation will still be relatively high in comparison to autumn and winter
The weather in Ireland in September in different parts of the country
The weather in Ireland in September can vary quite a bit. Below, we’ll provide you with an insight into the weather in Kerry, Belfast, Galway and Dublin in September.
Note: The rainfall figures and the average temperatures have been taken from the Irish Meteorological Service and the UK Met Office to ensure accuracy:
The weather in Dublin in September tends to be decent. The long-term average temperature in Dublin in September is 13.1°C/55.58°F. The long-term average rainfall level for Dublin in September is 59.5 millimetres.
The weather in Belfast in September is similar to Dublin. The average temperature in Belfast in September is 13°C/55.4°F. Average rainfall levels sit at 69.64 millimetres.
The weather in the west of Ireland in September tends to be wetter than the above cities. The long-term average temperature in Galway in September is 13.2°C/55.76°F. The long-term average rainfall level for Galway in September is 100.3 millimetres.
The weather in Kerry in September tends to be mild and wet. The long-term average temperature in Kerry in September is 13.9°C/57.02°F. The long-term average rainfall level for Kerry in September is 125.4 millimetres.
Things to do in Ireland in September
Many people planning a trip to Ireland tend to opt for September as the days are long and there’s plenty of time to explore.
If you’re on the hunt for things to do in Ireland in September, dive into our counties in Ireland section – it’s packed with the best places to visit in every county! Here are some suggestions to get you started:
1. Take a well planned road trip
There’s plenty of Ireland travel tips, but the one we always start with is to plan your route in advance.
Yes, the days are long in Ireland in September, but you need a well thought out plan of action to make the most of your time.
If you’d like a pre-planned trip, we have the world’s largest collection of Irish road trip itineraries.
2. Walks galore
One of the more popular things to do in Ireland in September when the weathers fine is to explore on foot. Luckily, there’s endless walks in Ireland to try.
From hiking the highest mountain in Ireland to more gentle trails, there’s something to suit every fitness level.
3. The ‘old reliables’
Although these popular attractions will still be busy, they’ll be much quieter than the summer season.
4. Hidden gems
However, if you can, try and carve out a bit of time to visit some of the more unique places to visit in Ireland, that tourists often miss.
5. Visiting Dublin in September
If the weathers bad, there’s plenty of things to do in Dublin in September when it’s raining!
What to pack / what to wear in Ireland in September
Although we’ve a detailed guide on what to wear in September in Ireland, I’ll give you the need-to-knows.
If you’re planning an active trip, bring your usual active wear. If you plan on eating out or visiting pubs, smart casual is more than enough.
- Sun cream (yep, really… well, OK – hopefully!)
- Comfy shorts and light trousers for walking about in
- A waterproof jacket (a light one that folds up into a pouch can come in handy)
- T-shirts or some light tops for the warmer days
- Causal clothes for wearing in the evening (pubs in Ireland are fairly relaxed)
Thinking about visiting during another month?
Picking when to visit Ireland isn’t easy, and there’s a lot to consider, so it’s well worth spending a little bit of time comparing what it’s like in Ireland during the other months of the year, when you have a second:
- Ireland in January
- Ireland in February
- Ireland in March
- Ireland in April
- Ireland in May
- Ireland in June
- Ireland in July
- Ireland in August
- Ireland in October
- Ireland in November
- Ireland in December
FAQs about spending September in Ireland
We’ve had a lot of questions over the years asking about everything from ‘What should I pack for Ireland in September?’ (see above) to ‘Is Ireland Green in September?’ (it is).
In the section below, we’ve popped in the most FAQs that we’ve received. If you have a question that we haven’t tackled, ask away in the comments section below.
Is September a good time to go to Ireland?
Yes. Peak-season has just ended, the days are long (sun rises at 06:41 and it sets at 20:14 at the beginning of the month) and we get average highs of 13°C/55°F and average lows of 9°C/48°F
Does it rain a lot in Ireland in September?
It can do. For example, last year, the number of days where rain fell ranged from ranged from 8 days to 23 days (see guide above for more info).
Are there many things to do in Ireland in September?
There’s endless things to do in Ireland in September, thanks to the long days, from hikes and walks to tours, museums and scenic drives.
Keith O’Hara has lived in Ireland for 34 years and has spent most of the last 10 years creating what is now The Irish Road Trip guide. Over the years, the website has published thousands of meticulously researched Ireland travel guides, welcoming 30 million+ visitors along the way. In 2022, the Irish Road Trip team published the world’s largest collection of Irish Road Trip itineraries. Keith lives in Dublin with his dog Toby and finds writing in the 3rd person minus craic altogether.