Kerry’s climate is the mildest in Ireland — palm-like cabbage trees and fuchsia hedges thrive — and among the wettest. Clear spells between Atlantic fronts are luminous; plan to move your Ring of Kerry day to suit the forecast.
Season by season
Spring (March–May)
Rhododendrons flower in the park in May and the mountains are often clearest. Boats and seasonal attractions reopen from Easter.
Summer (June–August)
Everything is running, including Skellig boats. The Ring’s roads and Killarney’s streets are at their busiest; start days early.
Autumn (September–October)
The oakwoods turn and the red deer rut echoes around the lakes in October. September is usually mild and far quieter.
Winter (November–February)
Rarely cold, often wet and windy, with short days. Many hotels close for a spell in January; Christmas events brighten December.
Month by month
| Month | Avg high / low | Wet days | Daylight | Our verdict |
|---|---|---|---|---|
| January | 10° / 4°C | ≈20 | ≈8 h | Quiet & cheap |
| February | 10° / 4°C | ≈16 | ≈9.5 h | Quiet & cheap |
| March | 11° / 5°C | ≈17 | ≈12 h | Good |
| April | 13° / 6°C | ≈14 | ≈14 h | Good |
| May | 15° / 8°C | ≈14 | ≈16 h | Best |
| June | 17° / 11°C | ≈13 | ≈17 h | Best |
| July | 19° / 13°C | ≈15 | ≈16.5 h | Peak season |
| August | 19° / 13°C | ≈16 | ≈14.5 h | Peak season |
| September | 17° / 11°C | ≈16 | ≈12.5 h | Best |
| October | 14° / 9°C | ≈19 | ≈10.5 h | Good |
| November | 12° / 6°C | ≈19 | ≈8.5 h | Quiet & cheap |
| December | 10° / 5°C | ≈20 | ≈7.5 h | Quiet & cheap |
Approximate long-term averages, rounded; daylight is the approximate time between sunrise and sunset mid-month. Irish weather changes quickly — pack for showers in any month.
Festivals & events
- Around 17 March St Patrick’s Festival, Killarney.
- May Rally of the Lakes motor rally (roads closed on stages); Killarney races begin.
- July Ring of Kerry Charity Cycle — thousands of cyclists circle the peninsula in a day. Killarney Races July festival.
- 10–12 August Puck Fair, Killorglin — one of Ireland’s oldest fairs, at which a wild goat is crowned king.
- Mid-August Rose of Tralee festival, in nearby Tralee.
- October–November The red deer rut in the national park; Halloween events in Kenmare.
- December Christmas in Killarney: parades, lights and markets.
Crowds & booking ahead
July and August bring coach traffic on the Ring from about 10 am to 5 pm and queues at Torc and Muckross at midday. Go early or in the evening. Skellig Michael’s short season means landing trips must be booked far ahead whatever the month.
