Weather in Lisbon on 17 August 2026
Preliminary outlook for 17 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +27°C and nighttime around +19°C, average precipitation 0 mm, wind around 6 m/s, humidity around 67%.
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.
+23°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +19°C
Precipitation: 0 mm
Wind: 4 — 7 m/s
Humidity: 54%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +24°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 338° ↖ (NNW) |
Sunrise
06:52
Duration
13 h 36 min
Sunset
20:28
Moonrise
00:09
Moonset
15:46
Moon phase
Last Quarter
Illumination
37%
+24°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +20°C
Sea temperature: +20°C
Precipitation: 0 mm
Wind: 7 — 9 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 2% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +20°C |
| Feels like (avg.) | +26°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 15 m/s | Wind direction (avg.) | 349° ↑ (N) |
Sunrise
06:52
Duration
13 h 36 min
Sunset
20:28
Moonrise
19:25
Moonset
03:44
Moon phase
Waxing Gibbous
Illumination
86%
+21°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 72%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 8% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 321° ↖ (NW) |
Sunrise
06:52
Duration
13 h 37 min
Sunset
20:29
Moonrise
07:56
Moonset
21:29
Moon phase
Waxing Crescent
Illumination
1%
+21°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 8 — 10 m/s
Humidity: 67%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 15% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 15 m/s | Wind direction (avg.) | 347° ↖ (NNW) |
Sunrise
06:52
Duration
13 h 36 min
Sunset
20:28
Moonrise
23:40
Moonset
12:47
Moon phase
Waning Gibbous
Illumination
61%
+22°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 7 — 8 m/s
Humidity: 64%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 14 m/s | Wind direction (avg.) | 338° ↖ (NNW) |
Sunrise
06:52
Duration
13 h 36 min
Sunset
20:28
Moonrise
16:12
Moonset
01:00
Moon phase
First Quarter
Illumination
61%
+22°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +19°C
Precipitation: 0.1 mm
Wind: 3 — 5 m/s
Humidity: 80%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 11 h |
| UV index | 6 | Cloud cover (avg.) | 52% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 270° ↙ (WSW) |
Sunrise
06:52
Duration
13 h 36 min
Sunset
20:28
Moonrise
04:46
Moonset
19:49
Moon phase
Waning Crescent
Illumination
1%
Weather in Lisbon on 17 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+30°C
|
+19°C
|
+23°C | 14 h | 6 | 54% | 4 — 7 m/s |
| 2024 |
+30°C
|
+20°C
|
+24°C | 14 h | 6 | 63% | 7 — 9 m/s |
| 2023 |
+26°C
|
+18°C
|
+21°C | 14 h | 6 | 72% | 4 — 6 m/s |
| 2022 |
+25°C
|
+18°C
|
+21°C | 14 h | 6 | 67% | 8 — 10 m/s |
| 2021 |
+28°C
|
+17°C
|
+22°C | 14 h | 6 | 64% | 7 — 8 m/s |
| 2020 |
+25°C
|
+19°C
|
+22°C | 11 h | 6 | 80% | 3 — 5 m/s |