Kinsale Weather in September

In Kinsale, September brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 13°C (55°F). Expect quite a bit of rainfall this month.

Rainfall in Kinsale in September

You can expect rain on roughly 17 days based on historical data, averaging 81 mm (3.2 in) for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.

Temperature in Kinsale in September

Temperatures in Kinsale in September top out at 17°C (63°F) and drop to 13°C (55°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Kinsale in September

The area enjoys a moderate level of sunlight, with around 128 hours. It's a good balance between sunny and cloudy days.

Wind Speed in Kinsale in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

With water at 15°C (59°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Kinsale.

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• January
• February
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• May
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• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Kinsale's climate page.

Kinsale Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 17°C (63°F)  

Water Temperature 15°C (59°F) *  

Chance of Rain 57%  

Precipitation 81 mm (3.2 in)  

Rainy days 17 days  

Humidity 75% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 128 hours *  

Percentage Sunshine 33% *  

* Data from: Cork, Ireland (16 KM, 10 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Kinsale typically stay consistent throughout September, with daily highs averaging around 17°C (63°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 12°C (54°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Kinsale in September

Browse day-by-day weather records for Kinsale spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Kinsale historical weather extremes in September

The extremes listed below come from historical weather data collected in Kinsale from 1976 through 2025.

• The hottest September day on record in Kinsale reached 25°C (77°F) (September 2, 1991).
• The lowest daytime temperature in September was 10°C (50°F), recorded on September 22, 2018.
• The coldest night in September in Kinsale was on September 25, 1992, with a minimum of 4°C (39°F).

What to Wear in Kinsale in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Kinsale in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Kinsale's climate page.

More climate data for Kinsale

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Kinsale climate overview or explore weather in Ireland.