Viana do Castelo weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Poor
Best time to visit: July – August
What is the weather like in Viana do Castelo in March?
In March, Viana do Castelo is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 13.7 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 143 mm in total. All in all, March is not an ideal month for a holiday in Viana do Castelo.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 18 | 19 | 23 |
| Day | 14° | 15° | 16° |
| Night | 8° | 9° | 11° |
| Sea | 13° | 14° | 15° |
| Sun | 5 h | 6 h | 7 h |
| Rain days | 10 | 12 | 12 |
More details for March
- Daylight
- 11 h 52 min06:49 – 18:41
- UV index
- 5 · moderateclear 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+0Europe/Lisbon
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 20 %45 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in March
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Viana do Castelo in March: quick answers
Is Viana do Castelo hot in March?
No. In March, Viana do Castelo is cool: daytime highs average 15 °C and nights drop to about 9 °C.
Can you swim in Viana do Castelo in March?
Only if you don't mind cold water: in March the sea averages just 13.7 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Viana do Castelo in March?
Rain is frequent, with about 12 rainy days and 143 mm in total.
Viana do Castelo month by month
The whole year in Viana do CasteloAll destinations: PortugalWhere to go in MarchSea temperature in March
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