Viana do Castelo weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Fair
Best time to visit: July – August
What is the weather like in Viana do Castelo in June?
In June, Viana do Castelo is mild: daytime highs average 21 °C, and nights cool down to about 15 °C. The sea averages 16.7 °C – swimming is only for the hardy. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 7 days, adding up to 45 mm. All in all, June is a so-so month for a holiday in Viana do Castelo.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 15 h 11 min06:00 – 21:11
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 44 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %28 %
- Seaweight 25 %0 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %82 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in June
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Viana do Castelo in June: quick answers
Is Viana do Castelo hot in June?
No. In June, Viana do Castelo is mild: daytime highs average 21 °C and nights drop to about 15 °C.
Can you swim in Viana do Castelo in June?
Only if you don't mind cold water: in June the sea averages just 16.7 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Viana do Castelo in June?
Rain falls on about 7 days, adding up to 45 mm.
Viana do Castelo month by month
The whole year in Viana do CasteloAll destinations: PortugalWhere to go in JuneSea temperature in June
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