Weather in Viana do Castelo on 11 August 2026
Preliminary outlook for 11 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +24°C and nighttime around +17°C, average precipitation 0 mm, wind around 3 m/s, humidity around 79%.
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.
+21°C
Weather archive — latest year: 2025
Patchy rain nearby
Weather archive — latest year: 2025
Nighttime: +16°C
Precipitation: 0 mm
Wind: 3 — 6 m/s
Humidity: 67%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 10 h |
| UV index | 6 | Cloud cover (avg.) | 22% |
| Pressure (avg.) | 763 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.) | 9 m/s | Wind direction (avg.) | 210° ↖ (NW) |
Sunrise
06:40
Duration
14 h 00 min
Sunset
20:40
Moonrise
21:50
Moonset
08:46
Moon phase
Waning Gibbous
Illumination
80%
+20°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +17°C
Sea temperature: +19°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 13% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +19°C |
| Feels like (avg.) | +19°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 212° ↓ (SSW) |
Sunrise
06:40
Duration
14 h 00 min
Sunset
20:40
Moonrise
13:55
Moonset
23:48
Moon phase
First Quarter
Illumination
42%
+21°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 79%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 767 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 171° ← (WNW) |
Sunrise
06:39
Duration
14 h 02 min
Sunset
20:41
Moonrise
01:38
Moonset
17:53
Moon phase
Waning Crescent
Illumination
28%
+20°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 85%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 32% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 192° ↓ (S) |
Sunrise
06:39
Duration
14 h 02 min
Sunset
20:41
Moonrise
20:42
Moonset
05:01
Moon phase
Waxing Gibbous
Illumination
95%
+20°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 167° ↖ (NW) |
Sunrise
06:40
Duration
14 h 00 min
Sunset
20:40
Moonrise
09:28
Moonset
22:33
Moon phase
Waxing Crescent
Illumination
18%
+20°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 85%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 31% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 215° ↙ (WSW) |
Sunrise
06:40
Duration
14 h 00 min
Sunset
20:40
Moonrise
00:25
Moonset
14:35
Moon phase
Last Quarter
Illumination
45%
Weather in Viana do Castelo on 11 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+26°C
|
+16°C
|
+21°C | 10 h | 6 | 67% | 3 — 6 m/s |
| 2024 |
+23°C
|
+17°C
|
+20°C | 14 h | 5 | 80% | 3 — 4 m/s |
| 2023 |
+24°C
|
+17°C
|
+21°C | 14 h | 6 | 79% | 3 — 4 m/s |
| 2022 |
+25°C
|
+16°C
|
+20°C | 12 h | 5 | 85% | 3 — 4 m/s |
| 2021 |
+24°C
|
+16°C
|
+20°C | 14 h | 5 | 78% | 4 — 6 m/s |
| 2020 |
+22°C
|
+18°C
|
+20°C | 14 h | 5 | 85% | 2 — 3 m/s |