May · United Kingdom
Best time to visit Giant's Causeway in May Weather, crowds & prices
Weather in Giant's Causeway in May
Average temperature 12°C, 69 mm of rain, about 18 days with 6+ hours of sunshine and 86% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.2/10
Ranked #2 of 12 months
- Avg temp
- 12°C
- Rainfall
- 69 mm
- Humidity
- 86%
- Days with 6h+ sun
- 18
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Giant's Causeway scores 8.2/10 for nature and wildlife travel - one of the top 12-month picks (#2). Expect around 12°C, 69 mm of rain, and roughly 18 days with 6+ hours of sunshine this month.
Hexagonal basalt columns meeting Atlantic spray peak in May-September.
May in Giant's Causeway: strong conditions, 2nd of 12
Expect 12°C (53°F) in May. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 69 mm of rain this month — a flexible day or two helps — with about 18 days with 6+ hours of sunshine and 15.9 hours of daylight to work around it.
That is 8.2/10 on the same scale — 2nd of 12 months, versus 8.8/10 for the best month here.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer, footwear you can get muddy.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Giant's Causeway in May?
- In May, Giant's Causeway averages 12°C, 69 mm of rain, and about 18 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is May a good time to visit Giant's Causeway?
- May earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Giant's Causeway in May?
- Expect about 69 mm of rain in May. Average humidity is 86% and there are about 18 days with 6+ hours of sunshine.
Curated in Giant's Causeway
Tickets & experiences
Things to do in Giant's Causeway
Giant's Causeway, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.