Cobh Weather in September

September in Cobh typically sees daytime highs of 18°C (64°F) and nighttime lows of 12°C (54°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Cobh in September

On average, there are about 17 days with rain during this month, averaging 72 mm (2.8 in). Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Cobh in September

Daytime temperatures in Cobh reach 18°C (64°F) in September, dropping to 12°C (54°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 12°C (54°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 Cobh in September

With about 128 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Wind Speed in Cobh 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

The water temperature is 15°C (59°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.

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

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

Cobh Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 18°C (64°F)  

Water Temperature 15°C (59°F) *  

Chance of Rain 56%  

Precipitation 72 mm (2.8 in)  

Rainy days 17 days  

Humidity 75% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 128 hours *  

Percentage Sunshine 33% *  

* Data from: Cork, Ireland (14 KM, 8 Miles).

What to Wear in Cobh in September

For Cobh in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Cobh 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 Cobh's climate page.

More climate data for Cobh

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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