Mar del Plata weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Fair
Best time to visit: October – April
What is the weather like in Mar del Plata in September?
In September, Mar del Plata is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 11.1 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain falls on about 7 days, adding up to 61 mm. All in all, September is a so-so month for a holiday in Mar del Plata.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 53 | 59 | 75 |
| Day | 14° | 15° | 18° |
| Night | 7° | 8° | 10° |
| Sea | 11° | 11° | 13° |
| Sun | 4 h | 3 h | 5 h |
| Rain days | 7 | 7 | 9 |
More details for September
- Daylight
- 11 h 48 min06:52 – 18:39
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−3America/Argentina/Buenos_Aires
How the score comes together
- Temperatureweight 50 %68 %
- Sunshineweight 20 %7 %
- Few rainy daysweight 30 %79 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- A jumper for the evenings
Mar del Plata in September: quick answers
Is Mar del Plata hot in September?
No. In September, Mar del Plata is cool: daytime highs average 15 °C and nights drop to about 8 °C.
Can you swim in Mar del Plata in September?
Only if you don't mind cold water: in September the sea averages just 11.1 °C. Comfortable swimming is possible from February to March.
Does it rain much in Mar del Plata in September?
Rain falls on about 7 days, adding up to 61 mm.
Mar del Plata month by month
The whole year in Mar del PlataAll destinations: ArgentinaWhere to go in SeptemberSea temperature in September
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