Weather in Portoroz on 17 August 2026
Preliminary outlook for 17 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +31°C and nighttime around +22°C, average precipitation 0.1 mm, wind around 3 m/s, humidity around 62%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+26°C
Weather archive — latest year: 2025
Partly Cloudy
Weather archive — latest year: 2025
Nighttime: +22°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 54%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 11 h |
| UV index | 7 | Cloud cover (avg.) | 33% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 63° ↑ (NNE) |
Sunrise
06:09
Duration
14 h 01 min
Sunset
20:10
Moonrise
23:52
Moonset
15:40
Moon phase
Last Quarter
Illumination
37%
+28°C
Weather archive — for 2024 year
Patchy rain nearby
Weather archive — for 2024 year
Nighttime: +24°C
Sea temperature: +27°C
Precipitation: 0.2 mm
Wind: 2 — 3 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 26% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +27°C |
| Feels like (avg.) | +29°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +29°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 170° ← (W) |
Sunrise
06:09
Duration
14 h 00 min
Sunset
20:09
Moonrise
19:19
Moonset
02:39
Moon phase
Waxing Gibbous
Illumination
86%
+26°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 2 m/s
Humidity: 58%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 10% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 206° ↖ (NNW) |
Sunrise
06:08
Duration
14 h 03 min
Sunset
20:11
Moonrise
07:10
Moonset
21:05
Moon phase
Waxing Crescent
Illumination
1%
+25°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +20°C
Precipitation: 0.3 mm
Wind: 2 — 2 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 12 h |
| UV index | 6 | Cloud cover (avg.) | 29% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 166° ↙ (WSW) |
Sunrise
06:08
Duration
14 h 02 min
Sunset
20:10
Moonrise
22:54
Moonset
12:23
Moon phase
Waning Gibbous
Illumination
61%
+24°C
Weather archive — for 2021 year
Cloudy
Weather archive — for 2021 year
Nighttime: +20°C
Precipitation: 0.2 mm
Wind: 5 — 6 m/s
Humidity: 65%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 5 h |
| UV index | 5 | Cloud cover (avg.) | 70% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 14 m/s | Wind direction (avg.) | 82° → (E) |
Sunrise
06:09
Duration
14 h 01 min
Sunset
20:10
Moonrise
16:01
Moonset
00:06
Moon phase
First Quarter
Illumination
61%
+25°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 8 h |
| UV index | 7 | Cloud cover (avg.) | 60% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +19°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 150° ↓ (S) |
Sunrise
06:09
Duration
14 h 00 min
Sunset
20:09
Moonrise
03:48
Moonset
19:37
Moon phase
Waning Crescent
Illumination
1%
Weather in Portoroz on 17 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+33°C
|
+22°C
|
+26°C | 11 h | 7 | 54% | 2 — 3 m/s |
| 2024 |
+33°C
|
+24°C
|
+28°C | 13 h | 7 | 55% | 2 — 3 m/s |
| 2023 |
+31°C
|
+21°C
|
+26°C | 12 h | 7 | 58% | 2 — 2 m/s |
| 2022 |
+30°C
|
+20°C
|
+25°C | 12 h | 6 | 69% | 2 — 2 m/s |
| 2021 |
+28°C
|
+20°C
|
+24°C | 5 h | 5 | 65% | 5 — 6 m/s |
| 2020 |
+29°C
|
+22°C
|
+25°C | 8 h | 7 | 69% | 2 — 3 m/s |