Viana do Castelo weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Poor
Best time to visit: July – August
What is the weather like in Viana do Castelo in October?
In October, Viana do Castelo is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 202 mm in total. All in all, October is not an ideal month for a holiday in Viana do Castelo.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 47 | 15 | 9 |
| Day | 22° | 19° | 15° |
| Night | 16° | 14° | 11° |
| Sea | 17° | 17° | 16° |
| Sun | 8 h | 5 h | 4 h |
| Rain days | 7 | 13 | 14 |
More details for October
- Daylight
- 11 h 10 min07:46 – 18:56
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 57 %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 %40 %
- Few rainy daysweight 20 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Viana do Castelo in October: quick answers
Is Viana do Castelo hot in October?
No. In October, Viana do Castelo is mild: daytime highs average 19 °C and nights drop to about 14 °C.
Can you swim in Viana do Castelo in October?
Only if you don't mind cold water: in October the sea averages just 17.0 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Viana do Castelo in October?
Rain is frequent, with about 13 rainy days and 202 mm in total.
Viana do Castelo month by month
The whole year in Viana do CasteloAll destinations: PortugalWhere to go in OctoberSea temperature in October
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