March weather forecast
Porto, Portugal

The transition from winter to spring begins in March in Porto. A tangible rise in temperature occurs, making this month warmer than February. However, the most pronounced change is in the longer daylight hours, presenting up to 12 hours of daylight. March hosts fewer rainy days as the city makes its way into spring. It is a prime time for starting to enjoy outdoor activities again, with the weather steadily improving.

Temperature

Porto, Portugal, experiences a subtle adjustment in high-temperatures to an enjoyable 17.4°C (63.3°F) with the onset of March, maintaining near parity with February's 15°C (59°F). In March, Porto records an average nighttime temperature of 7.8°C (46°F).

Rainfall

In Porto, in March, it is raining for 15 days, with typically 96mm (3.78") of accumulated precipitation. In Porto, Portugal, during the entire year, the rain falls for 147 days and collects up to 1237mm (48.7") of precipitation.

Sea temperature

February and March, with an average sea temperature of 13.8°C (56.8°F), are months with the coldest seawater in Porto.
Note: You can swim in 13.8°C (56.8°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.

Daylight

In March, the average length of the day is 11h and 58min.
On the first day of the month, sunrise is at 07:07 and sunset at 18:25. On the last day of March, sunrise is at 06:18 and sunset at 18:58 WET.

Sunshine

In Porto, the average sunshine in March is 6.2h.

UV index

In March, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In March, the maximum UV index of 4 transforms into these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.