Croatia
Istria in April: weather, sea & travel advice
This month's data profile
Clear transition month
Istria in April is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 15 °C, and the sea is about 13 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
48/100 · #7
Warmth
#7
Dryness
#7
Sun
#5
Sea warmth
#9
Published best categories: none
Istria · AprilPhoto: Einaz80 · CC BY-SA 4.0Climate facts
- Average high
- 15 °C
- Average low
- 10 °C
- Sea
- 13 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 76 %
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 |
|---|---|---|---|---|---|---|---|---|---|
| March | 12 | 6 | 9 | 69 | 4.4 | 77 | 3.4 | 11 | 41 |
| April (selected) | 15 | 10 | 11 | 73 | 5.9 | 76 | 3.0 | 13 | 48 |
| May | 20 | 14 | 12 | 82 | 7.2 | 75 | 2.7 | 17 | 63 |
How do the previous and next months compare?
Baseline: April (48/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| March | -7 | -3.5 °C | -3.3 °C | -1.9 | -3.1 mm | -1.5 h | +1.4 % | +0.4 m/s | -2 °C |
| May | +15 | +4.4 °C | +4.5 °C | +1 | +9.6 mm | +1.3 h | -1.2 % | -0.3 m/s | +4 °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 April?
The average daily high is around 15 °C, with an average daily low of about 10 °C.
Can you swim in Istria in April?
The sea is about 13 °C (cold).
Does it rain a lot in Istria in April?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 73 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. April is not among them.