Croatia
Istria in October: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Istria in October is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 18 °C, and the sea is about 20 °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
59/100 · #6
Warmth
#6
Dryness
#10
Sun
#8
Sea warmth
#5
Published best categories: Active
Istria · OctoberPhoto: Einaz80 · CC BY-SA 4.0Climate facts
- Average high
- 18 °C
- Average low
- 13 °C
- Sea
- 20 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 78 %
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 |
|---|---|---|---|---|---|---|---|---|---|
| September | 23 | 17 | 11 | 110 | 5.1 | 71 | 3.1 | 23 | 79 |
| October (selected) | 18 | 13 | 11 | 109 | 3.2 | 78 | 3.5 | 20 | 59 |
| November | 13 | 9 | 13 | 131 | 1.8 | 81 | 3.8 | 17 | 36 |
How do the previous and next months compare?
Baseline: October (59/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| September | +20 | +4.7 °C | +4 °C | -0.3 | +1.3 mm | +1.9 h | -6.9 % | -0.3 m/s | +2.9 °C |
| November | -23 | -4.9 °C | -4.2 °C | +1.7 | +22.4 mm | -1.4 h | +3.7 % | +0.4 m/s | -2.7 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Istria in October?
The average daily high is around 18 °C, with an average daily low of about 13 °C.
Can you swim in Istria in October?
The sea is about 20 °C (refreshing).
Does it rain a lot in Istria in October?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 109 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. October is not among them.