Cascais 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: June – September
What is the weather like in Cascais in March?
In March, Cascais is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 14.9 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 9 rainy days and 62 mm in total. All in all, March is not an ideal month for a holiday in Cascais.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 24 | 25 | 29 |
| Day | 15° | 17° | 18° |
| Night | 10° | 11° | 13° |
| Sea | 15° | 15° | 16° |
| Sun | 6 h | 7 h | 8 h |
| Rain days | 7 | 9 | 9 |
More details for March
- Daylight
- 11 h 53 min06:51 – 18:44
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 23 km/haverage daily peak
- Cloud cover
- 52 %on average
- 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 %63 %
- Few rainy daysweight 20 %63 %
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
Cascais in March: quick answers
Is Cascais hot in March?
No. In March, Cascais is mild: daytime highs average 17 °C and nights drop to about 11 °C.
Can you swim in Cascais in March?
Only if you don't mind cold water: in March the sea averages just 14.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Cascais in March?
Rain is frequent, with about 9 rainy days and 62 mm in total.
Cascais month by month
The whole year in CascaisAll 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)