Best time to visit Giant's Causeway
Month-by-month weather averages for Giant's Causeway.
Giant's Causeway, Northern Ireland, United Kingdom
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 8 °C / 46 °F | 5.8 °C / 42 °F | 129 mm / 5.1 in | neither best nor good |
| February | 7.8 °C / 46 °F | 5.6 °C / 42 °F | 100 mm / 3.9 in | neither best nor good |
| March | 8 °C / 46 °F | 5.8 °C / 42 °F | 90 mm / 3.5 in | neither best nor good |
| April | 9.1 °C / 48 °F | 7.1 °C / 45 °F | 66 mm / 2.6 in | neither best nor good |
| May | 10.9 °C / 52 °F | 9 °C / 48 °F | 68 mm / 2.7 in | neither best nor good |
| June | 12.8 °C / 55 °F | 11.2 °C / 52 °F | 83 mm / 3.3 in | neither best nor good |
| July | 14.4 °C / 58 °F | 12.8 °C / 55 °F | 95 mm / 3.8 in | neither best nor good |
| August | 15 °C / 59 °F | 13.3 °C / 56 °F | 108 mm / 4.2 in | neither best nor good |
| September | 14.6 °C / 58 °F | 12.7 °C / 55 °F | 101 mm / 4 in | neither best nor good |
| October | 12.9 °C / 55 °F | 11 °C / 52 °F | 136 mm / 5.4 in | neither best nor good |
| November | 10.6 °C / 51 °F | 8.5 °C / 47 °F | 154 mm / 6.1 in | neither best nor good |
| December | 9.1 °C / 48 °F | 6.7 °C / 44 °F | 152 mm / 6 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: neither
- DDecember: neither
No month is good for this in Giant's Causeway.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: best
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: good
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Best
- May–June
- Good
- April, July–September
Why these months
April · good
In its favour: precipitation 66 mm / 2.6 in, average daily high 9.1 °C / 48 °F, days with heavy rain 1.3 days, average daily low 7.1 °C / 45 °F, share of daylight that is sunny 72%, daylight per day 14.2 h, wet days 12.3 days, wind (daily max) 33 km/h / 21 mph.
Against: feels like (high) 5 °C / 41 °F.
May · best
In its favour: average daily high 10.9 °C / 52 °F, precipitation 68 mm / 2.7 in, days with heavy rain 1.4 days, average daily low 9 °C / 48 °F, share of daylight that is sunny 70%, daylight per day 16.2 h, feels like (high) 7.7 °C / 46 °F, wind (daily max) 31 km/h / 19 mph.
Against: wet days 13.2 days.
June · best
In its favour: average daily high 12.8 °C / 55 °F, precipitation 83 mm / 3.3 in, days with heavy rain 2.3 days, average daily low 11.2 °C / 52 °F, share of daylight that is sunny 66%, daylight per day 17.3 h, feels like (high) 10.5 °C / 51 °F, wind (daily max) 28 km/h / 18 mph.
Against: wet days 13.4 days.
July · good
In its favour: average daily high 14.4 °C / 58 °F, precipitation 95 mm / 3.8 in, feels like (high) 12.7 °C / 55 °F, average daily low 12.8 °C / 55 °F, share of daylight that is sunny 64%, daylight per day 16.8 h, days with heavy rain 2.6 days, wind (daily max) 28 km/h / 17 mph.
Against: wet days 16.3 days.
August · good
In its favour: average daily high 15 °C / 59 °F, precipitation 108 mm / 4.2 in, feels like (high) 13 °C / 55 °F, average daily low 13.3 °C / 56 °F, share of daylight that is sunny 66%, daylight per day 14.9 h, days with heavy rain 2.8 days, wind (daily max) 31 km/h / 19 mph.
Against: wet days 17.6 days.
September · good
In its favour: average daily high 14.6 °C / 58 °F, precipitation 101 mm / 4 in, days with heavy rain 2.4 days, feels like (high) 11.8 °C / 53 °F, average daily low 12.7 °C / 55 °F, share of daylight that is sunny 62%, daylight per day 12.7 h.
Against: wet days 16.9 days, wind (daily max) 35 km/h / 22 mph.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Glencoe Mountain Resort, 183 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 2.5 °C | 2.4 °C | 3.2 °C | 5 °C | 7.7 °C | 10.5 °C | 12.7 °C | 13 °C | 11.8 °C | 9 °C | 5.8 °C | 3.7 °C |
| Days with heavy rain | 4.1 days | 2.8 days | 2.1 days | 1.3 days | 1.4 days | 2.3 days | 2.6 days | 2.8 days | 2.4 days | 4.5 days | 5 days | 5.2 days |
| Time rain usually falls | 3 am | 7 am | 4 am | 2 am | 11 am | 5 pm | 8 pm | 8 am | 8 pm | 6 am | 8 am | 10 am |
| Sunshine per day | 4 h | 5.6 h | 7.5 h | 10.2 h | 11.3 h | 11.5 h | 10.7 h | 9.8 h | 7.8 h | 5.8 h | 4.4 h | 3.3 h |
| Relative humidity | 80% | 80% | 80% | 80% | 83% | 86% | 87% | 85% | 82% | 80% | 79% | 81% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 4.4 µg/m³ | 4.7 µg/m³ | 5.3 µg/m³ | 7.2 µg/m³ | 8.3 µg/m³ | 9.1 µg/m³ | 6.3 µg/m³ | 6.9 µg/m³ | 6 µg/m³ | 4.9 µg/m³ | 3.6 µg/m³ | 3.7 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 7.2 µg/m³ | 7.8 µg/m³ | 8.9 µg/m³ | 11.4 µg/m³ | 12.8 µg/m³ | 14.1 µg/m³ | 9.9 µg/m³ | 10.7 µg/m³ | 9.1 µg/m³ | 8 µg/m³ | 6.1 µg/m³ | 6.1 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
World Heritage sites nearby
UNESCO World Heritage sites within 25 km, nearest first.
- Giant's Causeway
2 km away