What is the weather like in Viana do Castelo right now?
It is currently 17°C in Viana do Castelo with cloudy. It feels like 18°C, humidity is 89% and the wind is NW 1 km/h.
Today (Sunday) reaches a maximum of 19°C and a minimum of 16°C, with 0 mm of rain and 3.9 hours of sunshine. Sunrise is at 07:42 and sunset at 19:00.
Viana do Castelo weather tomorrow
Tomorrow (Monday) the maximum temperature in Viana do Castelo is 20°C and the minimum 13°C. Around 0 mm of rain is expected with 10.5 hours of sunshine, and the chance of rain is 8%. The data is refreshed several times a day through Open-Meteo.
Viana do Castelo weather this week and next week
Over the coming week the average maximum temperature in Viana do Castelo sits around 21°C and the average minimum around 14°C. Roughly 0 mm of rain is expected, spread across 0 days, with 1 largely sunny day.
The warmest day in the 14 day forecast for Viana do Castelo is Wednesday 14 Oct at 23°C. The coldest night falls on Monday 19 Oct at 8°C. Click any day for hourly detail.
Rain, sunshine and UV in Viana do Castelo
A daily rainfall total says little on its own: the same 5 mm can be one short downpour or a grey day of drizzle, which is why the hourly chart above is often the more useful of the two. Over the next fortnight the highest UV index for Viana do Castelo is 5, which is low to moderate.
How reliable is a 14 day forecast?
The first three to five days are generally very accurate. After that the certainty drops off and it is better read as a trend than as an exact daily prediction. Our data comes from Open-Meteo, which combines national weather models — among them the Met Office, DWD and ECMWF — and recomputes them several times a day using measurements from stations worldwide.
Forecast for Viana do Castelo last updated: 11 October 2026 at 21:30. See also all Portugal forecasts and the European weather map.