Monthly Climate
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Best time to visit Dublin

August is the best time to visit Dublin for general sightseeing, with average highs of 18 °C and about 13 wet days. The comfortable season runs roughly June to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking August comfort 75/100
A beach holiday August sea 15 °C
The least cloud May 69 % average cloud cover
The least rain February 58 mm
Warmth July 18 °C
Cooler weather January 7.9 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 75 18 °C 13 22
2 July 75 18 °C 15 19
3 June 71 17 °C 13 14
4 September 69 16 °C 12 16
5 May 59 14 °C 14 4
6 October 56 13 °C 12 6
7 April 47 12 °C 13 3
8 November 41 10 °C 13 4
9 March 40 9.6 °C 12 7
10 February 34 8.2 °C 12 7
11 December 34 8.3 °C 12 6
12 January 31 7.9 °C 13 4

For a beach holiday

August scores highest, with a sea temperature of 15 °C and air temperatures around 18 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 9.1 °C 7.9 °C 74 % 4
February 8.1 °C 8.2 °C 73 % 7
March 7.9 °C 9.6 °C 73 % 7
April 8.7 °C 12 °C 70 % 3
May 11 °C 14 °C 69 % 4
June 13 °C 17 °C 73 % 14
July 15 °C 18 °C 76 % 19
August 15 °C 18 °C 74 % 22
September 15 °C 16 °C 73 % 16
October 13 °C 13 °C 73 % 6
November 12 °C 10 °C 73 % 4
December 11 °C 8.3 °C 73 % 6

When to think twice

January scores lowest with about 13 wet days and highs near 7.9 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 7.9 °C 70 mm 74 %
February 8.2 °C 58 mm 73 %
March 9.6 °C 59 mm 73 %
April 11.5 °C 66 mm 70 %
May 14.2 °C 67 mm 69 %
June 16.8 °C 74 mm 73 %
July 18.4 °C 76 mm 76 %
August 18.2 °C 79 mm 74 %
September 16.3 °C 70 mm 73 %
October 13.3 °C 78 mm 73 %
November 10.2 °C 86 mm 73 %
December 8.3 °C 76 mm 73 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.