Ireland
Dublin in August: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Dublin in August is climatically well suited to city breaks. The average daily high is around 18 °C, and the sea is about 15 °C. With about 16 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
45/100 · #1
Warmth
#2
Dryness
#7
Sun
#4
Sea warmth
#1
Published best categories: City break, Active
Dublin · AugustPhoto: Holger Uwe Schmitt · CC BY-SA 4.0Climate facts
- Average high
- 18 °C
- Average low
- 12 °C
- Sea
- 15 °C
- Rainy days (est.)
- 16 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 86 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| July | 18 | 12 | 17 | 78 | 5.7 | 85 | 3.5 | 15 | 44 |
| August (selected) | 18 | 12 | 16 | 88 | 4.9 | 86 | 3.7 | 15 | 45 |
| September | 16 | 11 | 14 | 81 | 3.7 | 87 | 4.2 | 15 | 40 |
How do the previous and next months compare?
Baseline: August (45/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| July | -1 | ±0 °C | ±0 °C | +0.8 | -10.7 mm | +0.8 h | -0.7 % | -0.3 m/s | -0.4 °C |
| September | -5 | -1.7 °C | -1.3 °C | -1.9 | -7.4 mm | -1.2 h | +1.2 % | +0.5 m/s | -0.6 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Dublin in August?
The average daily high is around 18 °C, with an average daily low of about 12 °C.
Can you swim in Dublin in August?
The sea is about 15 °C (cold).
Does it rain a lot in Dublin in August?
The curated estimate is about 16 rainy days per month, not a directly measured long-term average. Total precipitation averages around 88 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Dublin?
No month in Dublin reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.