Giant's Causeway weather in September
Cool, with regular rainfall. Average highs of 16°C and lows of 12°C, with around 15 rainy days expected throughout the month.
While September isn't our top-rated month for Giant's Causeway, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
16°C
Average low
12°C
Rainy days
15 days
Best months to visit
Year-round
What to do in Giant's Causeway in September
Whatever the weather, Giant's Causeway rewards curious visitors. Here are some of the best ways to spend your time:
Walk amongst the basalt columns at different tides
Hike along the Antrim Coast Road to Carrick-a-Rede rope bridge
Visit Dunluce Castle's dramatic cliffside ruins
Explore nearby Bushmills for whiskey distillery tours
Spot puffins on Carrick-a-Rede island (spring)
Drive the scenic coastal route to Ballycastle
What to pack for September
Layer up — a mid-weight jacket, jumpers, and comfortable trousers. Waterproof shoes are recommended. Scarves and gloves may be useful in the evenings.
Browse other months
January
8C
Cold, with regular rainfall.
February
8C
Cold, with regular rainfall.
March
9C
Cold, with regular rainfall.
April
11C
Cool, with some rainy days.
May
13C
Cool, with regular rainfall.
June
16C
Cool, with regular rainfall.
July
17C
Cool, with regular rainfall.
August
17C
Cool, with frequent heavy rain.
September (you are here)
16C
Cool, with regular rainfall.
October
13C
Cool, with regular rainfall.
November
10C
Cool, with regular rainfall.
December
9C
Cold, with regular rainfall.
Book your September trip to Giant's Causeway
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