Porto in March

In March, Porto has 109.4 mm (4.31 in) of rain, a daily high of 17.7 °C (63.9 °F) and a daily low of 8.2 °C (46.8 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records.

Last updated 8 November 2026: first sourced version.

Best time to visit Porto: March meets our rule. Expect 9.2 rain days (model estimate) and days that grow by 1 h 23 min.

What March is like in Porto

On a weekend in early March, Porto fêtes the camellia, queen of winter flowers. A show, held one year in São Bento Station, ends with a prize. Source: Câmara Municipal do Porto (Porto city council), checked 8 November 2026.
As spring nears, magnolias open pink and mauve flowers on bare branches all over Porto. Praça Francisco Sá Carneiro is one square where they grow. Source: Câmara Municipal do Porto (Porto city council), checked 8 November 2026.
In March, the Harmos Festival plays chamber music in Porto, in rooms such as the Casa do Infante and the Museu Romântico. Source: Câmara Municipal do Porto (Porto city council), checked 8 November 2026.

How we choose these portraits

Key figures

Weather in March, 1991-2020 model estimates

Daily high: 17.7 °C (63.9 °F)
Daily low: 8.2 °C (46.8 °F)
Rain: 109.4 mm (4.31 in) in the month
Sunshine: no data

Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high and Days with rain: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked 8 November 2026. How we make and test model estimates

Model estimate for the ERA5-Land grid cell at 41.1° N, 8.6° W, 6 km from the city centre point.

How we define and convert these figures

Notes. Sunshine: Not in our ERA5-Land estimates.

Daylight on 15 March 2026

Sunrise: 06:46 local time
Sunset: 18:41 local time
Day length: 11 h 55 min

Day length 1-31 March: 11 h 16 min to 12 h 39 min, +1 h 23 min.

How we compute daylight

Source: NOAA Solar Calculator equations, checked 3 October 2026.

Clocks go forward one hour on Sunday 29 March 2026 at 01:00 (UTC+0 to UTC+1); in 2027 on 28 March.

Source: tz database 2026d, checked 3 October 2026.

Month by month

Each month: daily high in °C, then rain in mm, 1991-2020 model estimates.

ERA5-Land model estimates 1991-2020, as above, checked 8 November 2026.

This month against the year

Porto: March ranked against the 12 months
Measure	March	Rank
Daily high	17.7 °C	5th coldest
Daily low	8.2 °C	4th coldest
Rain	109.4 mm	6th wettest
Sunshine	no data	no data
Day length	11 h 55 min	6th shortest

Equal values share a rank. How we rank months

Porto in March, on average: 9.2 rain days (1 mm or more). Model estimate, adjusted against station records.

ERA5-Land model estimates 1991-2020, as above, checked 8 November 2026.

Day length: NOAA solar equations, checked 3 October 2026.

Public holidays this month

March 2026: none.

Typed from the official list and re-checked, 2 October 2026.

March 2027: no data. No official page gives the 2027 Easter and Corpus Christi dates yet.

How we check holidays

Source: Official public holiday list (dgaj.justica.gov.pt), checked 2 October 2026; holidays Python library, checked 3 October 2026. Library: holidays 0.105.

Same month in 8 model-estimate cities

Porto is warmer than 1 of our 8 model-estimate cities in March by mean daily high. How we rank cities

Closest high and low in March: Lisbon (1.7 °C apart), Istanbul (4.2), Melbourne (6.1).

March in 8 model-estimate cities: daily high and low, monthly rain, 1991-2020 model estimates. Bars: high and low share one scale, coldest to warmest city; rain starts at zero.
City	Gap from Porto, °C	High, °C	Low, °C	Rain, mm	Sunshine, hours
Porto (this page)	—	17.7	8.2	109.4	no data
Lisbon (closest)	1.7	18.1	11.2	53.8	no data
Istanbul (closest)	4.2	12.2	5.3	74.1	no data
Melbourne (closest)	6.1	24.5	13.5	39.4	no data
Sydney	9.0	25.3	18.5	80.4	no data
Delhi	10.0	30.6	15.2	no data	no data
Mumbai	14.8	33.4	22.0	no data	no data
Bangkok	17.2	34.5	25.7	no data	no data

Sources (1991-2020): ERA5-Land model estimates, checked 8 November 2026. Each city's page names its grid cell. All sources in full on Methodology.

All cities in March

Sources

Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked 8 November 2026.
NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked 3 October 2026.
IANA Time Zone Database, read through the PyPI tzdata package. Attribution: IANA Time Zone Database. Licence: Public-domain data. Checked 3 October 2026.
holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked 3 October 2026.

Official sources

Official public holiday list (dgaj.justica.gov.pt). Checked 2 October 2026.

Cite this page: City by Month. "Porto in March: weather, daylight, holidays". https://citybymonth.com/cities/portugal/porto/march/. Last updated 8 November 2026.