Viana do Castelo weather in April
Temperature, sea and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Poor
Best time to visit: July – August
What is the weather like in Viana do Castelo in April?
In April, Viana do Castelo is mild: daytime highs average 16 °C, and nights cool down to about 11 °C. The sea averages 14.6 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 130 mm in total. All in all, April is not an ideal month for a holiday in Viana do Castelo.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 18 min06:57 – 20:14
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %72 %
- Few rainy daysweight 20 %41 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in April
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Viana do Castelo in April: quick answers
Is Viana do Castelo hot in April?
No. In April, Viana do Castelo is mild: daytime highs average 16 °C and nights drop to about 11 °C.
Can you swim in Viana do Castelo in April?
Only if you don't mind cold water: in April the sea averages just 14.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Viana do Castelo in April?
Rain is frequent, with about 12 rainy days and 130 mm in total.
Viana do Castelo month by month
The whole year in Viana do CasteloAll destinations: PortugalWhere to go in AprilSea temperature in April
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences