Croatia
Istria in August: weather, sea & travel advice
This month's data profile
Sea conditions lead
Istria in August is climatically well suited to beach holidays, family holidays and city breaks. The average daily high is around 28 °C, and the sea is about 25 °C. With about 9 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
85/100 · #2
Warmth
#1
Dryness
#4
Sun
#4
Sea warmth
#1
Published best categories: Overall, Beach, Family
Istria · AugustPhoto: Einaz80 · CC BY-SA 4.0Climate facts
- Average high
- 28 °C
- Average low
- 21 °C
- Sea
- 25 °C
- Rainy days (est.)
- 9 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 65 %
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 | 27 | 21 | 9 | 53 | 8.2 | 66 | 2.5 | 25 | 86 |
| August (selected) | 28 | 21 | 9 | 67 | 7.1 | 65 | 2.6 | 25 | 85 |
| September | 23 | 17 | 11 | 110 | 5.1 | 71 | 3.1 | 23 | 79 |
How do the previous and next months compare?
Baseline: August (85/100)
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 | -0.6 °C | -0.2 °C | -0.1 | -13.9 mm | +1.1 h | +1.2 % | -0.2 m/s | -0.7 °C |
| September | -6 | -4.7 °C | -3.9 °C | +2.1 | +43.7 mm | -2 h | +6 % | +0.5 m/s | -2.6 °C |
All twelve months in context
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Where to stay in Istria
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Useful next decisions
Frequently asked questions
How warm is Istria in August?
The average daily high is around 28 °C, with an average daily low of about 21 °C.
Can you swim in Istria in August?
The sea is about 25 °C (warm).
Does it rain a lot in Istria in August?
The curated estimate is about 9 rainy days per month, not a directly measured long-term average. Total precipitation averages around 67 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Istria?
By the climate score, June, July, August and September are the strongest months for Istria. For a beach trip: June, July, August and September. August is one of them.