When is the best time to visit Ireland?

Ireland by season in one view

Met Eireann describes winters as cool and windy and summers as mostly mild and less windy, with the Atlantic Ocean as the dominant influence on the climate. Its page says the least rain falls from February to June, then westerly winds bring more cloud, humidity and rain from late June or early July, and October and November see moderate to heavy frontal rain.

For a visitor that suggests April to June for the best chance of drier days, July and August for the warmest weather, and September and October as a shoulder period that is quieter but already getting wetter. The sections below test that picture against station figures for the east, the mid-west and the Atlantic north-west.

East versus west: Dublin, Shannon and Belmullet

Dublin is on the east coast, Shannon Airport in the mid-west and Belmullet in County Mayo on the Atlantic edge. The pattern is consistent across all three: the further west, the wetter. Dublin has between 10.2 and 12.9 rain days a month, Shannon between 11.3 and 16.1, and Belmullet between 18 and 24. Monthly rainfall at Belmullet never falls below 70.2 mm, while Dublin's driest month, February, has 48.8 mm.

Temperatures run the other way in winter and summer. In January the average high is 8.1 degrees Celsius at Dublin, 8.8 at Shannon and 8.9 at Belmullet, so the Atlantic coast is the milder in winter. In July the high is 19.5 at Dublin, 19.8 at Shannon and 17.6 at Belmullet, and the western edge peaks in August at 17.8. For a base in Dublin or Galway, the Dublin and Shannon tables are the nearer guides. Galway has no table here, so use the mid-west and Atlantic stations as a range.

Spring: the drier stretch begins

Met Eireann says the spring months are among the drier ones, and its page notes that the sea is coldest in February and March, which slows the warm-up. Inland air frost can occur even in May. Tourism Ireland's Dublin table lists about 4 hours of sunshine a day in March and 6 in April and May.

The station normals back the drier claim, with a caveat. Dublin's rainfall is 48.8 to 59.5 mm in February, March, April and May. Shannon's driest month is April at 59.2 mm, and Belmullet's is May at 70.2 mm. Rain days barely move, though: Dublin still records 10.8 in April and 11.0 in May. Spring is therefore drier than autumn, not dry, and a waterproof layer belongs in the bag.

Summer: warmest, but not the driest

July and August are the warmest months. Dublin reaches an average high of 19.5 degrees Celsius in July and 19.2 in August, with lows of 11.7 and 11.5. Tourism Ireland's table lists about 5 hours of sunshine a day in July and August and 6 in June.

Met Eireann notes that from late June or early July westerly winds bring more cloud, humidity and rain, and that summer thunderstorms can occur in mid to late summer. The numbers agree: Dublin's August total of 73.3 mm is higher than any month from February to July, and Belmullet's rises from 72.1 mm in June to 101.9 in August. Summer is the warmest period, but the driest months on these normals fall earlier in the year. It is also peak season, so book rooms before you fix flights.

Autumn: the wetter shoulder season

September still has only 10.2 rain days at Dublin, and the Dublin average high is 17.0 degrees Celsius. October is where the figures turn: it is the wettest month at all three stations, at 79.0 mm at Dublin, 104.9 at Shannon and 145.9 at Belmullet. November follows at 72.9, 94.1 and 134.0 mm.

Met Eireann says October and November bring moderate to heavy frontal rain, and that severe storms are rare but can occur from late summer through autumn when former tropical systems merge with North Atlantic weather. That makes September the better shoulder month for a first visit, and October to November a time to expect rain and shorter days, in return for quieter streets and off-peak rooms.

Winter: mild but wet and windy

Dublin's January average high is 8.1 degrees Celsius and the lowest monthly low is 2.3 in February. Tourism Ireland's table shows only about 2 hours of sunshine a day in December and January. Met Eireann says strong winds and frontal rain are common in December and January, as depressions move quickly eastward.

Snow is possible but usually brief. Met Eireann says January and February are the snowiest months, snow can fall from November to April, and it usually lies only for a day or two, though some events have lasted 10 to 12 days. For a winter break the draw is low demand and short city days; hillwalking and coastal drives need flexible plans around wind and rain.

Storm season and warnings

Met Eireann runs the storm-naming programme jointly with the UK Met Office and the Dutch service KNMI. The 2026/27 season started on 1 September 2026 and runs to 31 August 2027. A storm is named when it could cause medium or high impacts in one of the partner countries, and orange or red warnings for wind, rain or snow may be issued alongside a named storm. The 2026/27 list has 21 names, beginning with Austen, Boelo and Chloe.

Warnings are issued at yellow, orange and red levels: yellow is not unusual weather with localised danger, orange is infrequent and dangerous or disruptive, and red is rare and extremely dangerous. These pages describe how the system works. For any day of travel, read the warnings on the Met Eireann site, because this page cannot show current conditions.

Best months by purpose

These pairings are our selection, not a ranking. The criteria were Met Eireann's seasonal description and the station figures on this page.

• Drier days for walking and sightseeing: April to June, within Met Eireann's February to June low-rainfall period; Dublin has about 6 hours of sunshine a day in those months (Tourism Ireland).
• Warmest weather: July and August, with Dublin highs of 19.5 and 19.2 degrees Celsius.
• Fewer visitors with milder weather: September, with 10.2 rain days at Dublin and a 17.0 degree high.
• Atlantic coast in winter: milder than the east on average, with a January high of 8.9 degrees at Belmullet, but wetter, with 23 rain days.
• Lowest demand: November to February, when rain is frequent and daylight short.

Limits of these figures

The normals cover 1981 to 2010 and three stations. Galway, Cork, Kerry and Donegal are not shown, and an exposed headland can differ from the airport or city station. Rain days at these stations count from 0.1 mm, so a day can count with only a light shower. Tourism Ireland's sunshine hours are for Dublin and are rounded.

A kitchen helps on a long stay, when a wet day means cooking in rather than eating out; our note on Dublin areas for longer stays covers the city. Entry rules are not covered here; check the official Irish immigration website.