Lahinch weather in September 2026

Q: How warm is it in Lahinch in September?

Daytime temperatures usually reach 17°C in Lahinch in September, falling to 10°C at night.

Q: How sunny is it in Lahinch in September?

There are normally 4 hours of bright sunshine each day in Lahinch in September - that's 33% of daylight hours.

Q: How warm is the sea around Lahinch in September?

The average sea temperature around Lahinch in September is 14°C.

Q: Does it rain in Lahinch in September?

There are usually 15 days with some rain in Lahinch in September and the average monthly rainfall is 64mm.

Expect daytime maximum temperatures of 16°C in Lahinch, Ireland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 118 mm of rainfall in the month.

16
16°C max day temperature
4
4 hours of sunshine per day
19
19 days with some rainfall
9
9°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
118
118 mm of monthly rainfall
4
4 (Moderate) UV index
15
15°C sea temperature

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The September weather guide for Ireland (Lahinch) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)