Mar del Plata Weather in September

September in Mar del Plata typically sees daytime highs of 16°C (61°F) and nighttime lows of 7°C (45°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Mar del Plata in September

Looking at the last 30 years, the data shows about 7 days with rain, averaging 64 mm (2.5 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Mar del Plata in September

Daytime highs in Mar del Plata in September reach 16°C (61°F), with nights around 7°C (45°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Mar del Plata in September

The area enjoys a moderate level of sunlight, with around 177 hours. It's a good balance between sunny and cloudy days.

Wind Speed in Mar del Plata in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in September

With water temperatures around 11°C (52°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

If you prefer dry days with pleasant temperatures, January, February, March, April, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Mar del Plata's climate page.

Mar del Plata Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 16°C (61°F)  

Water Temperature 11°C (52°F)  

Chance of Rain 23%  

Precipitation 64 mm (2.5 in)  

Rainy days 7 days  

Humidity 80%  

Windspeed 5 m/s (10 knots)  

Sunshine 177 hours  

Percentage Sunshine 47%  

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Mar del Plata typically stay consistent throughout September, with daily highs averaging around 16°C (61°F). Nights are cold, with lows typically ranging from 5°C (41°F) to 8°C (46°F).

Average temperatures in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Daily Historical Precipitation

49-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Mar del Plata in September

Browse day-by-day weather records for Mar del Plata spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Mar del Plata historical weather extremes in September

The extremes listed below come from historical weather data collected in Mar del Plata from 1989 through 2025.

• Mar del Plata recorded its highest September temperature of 28°C (82°F) on September 12, 1991.
• The lowest daytime temperature in September was 7°C (45°F), recorded on September 17, 2013.
• Nighttime temperatures dropped to -3°C (27°F) on September 1, 1990, marking the coldest September night on record.

What to Wear in Mar del Plata in September

Pack for changing conditions in Mar del Plata in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 11°C (52°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Mar del Plata in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Mar del Plata's climate page.

More climate data for Mar del Plata

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Mar del Plata climate overview or explore weather in Argentina.