Weather and climate in Mar Del Plata (Argentina)

The climate of Mar del Plata is temperate oceanic (according to the Köppen classification, oceanic climate - Cfb), with mild winters and warm summers, and no dry season.
The city is located on the Atlantic coast of Argentina, on the 38th parallel south.
Even though it is located on the coast, the city is exposed both to outbreaks of cold air of Antarctic origin and to invasions of hot air of tropical origin, therefore it is subject to sudden changes in temperature.
The sun shines for a good number of hours, especially in summer, when it shines 60/63% of the time.
In summer, from December to February, average temperatures suggest pleasant weather, however, it can sometimes get cold at night, while in other circumstances there can be heat waves. In January 2022, the heat record was broken with 42.4 °C (108.3 °F). In any case, the wind blows frequently, moreover, the sea is not warm.
In winter, from June to August, fog can sometimes form. Snow is rare, but at night the temperature can drop below freezing. In July 1988 it dropped to -9.3 °C (15.3 °F).
The waves of bad weather, with rain, wind and rough sea, are brought by the winds from the south-east, and for this reason are called sudestadas.

Best Time

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It is difficult to find the best time to visit Mar del Plata, as there is no dry season, and there can be sudden changes in temperature.
The summer, from December to February, is the warmest and sunniest season, but the rains are more abundant. The sea is quite cold even in this season, although it is warmer than in the other months. Sometimes it can get cold even in summer, especially at night.
On other occasions, however, there may be heat waves, even though the temperature exceeds 36 °C (97 °F) quite rarely.
Alternatively, you can choose the shoulder seasons, March-April and October-November.

Mar Del Plata - Climate data

The average temperature of the coldest month (July) is of 7.9 °C (46.2 °F), that of the warmest month (January) is of 20.4 °C (68.8 °F). Here are the average temperatures.
Precipitation amounts to 945 millimeters (37.2 inches) per year: so, it is at an intermediate level. It ranges from 58 mm (2.3 in) in the driest month (July) to 104 mm (4.1 in) in the wettest one (February). Here is the average precipitation.
The sea temperature ranges from 8.5 °C (47 °F) in August to 19.5 °C (67 °F) in February. Here are the average sea temperatures.
There are on average around 2410 sunshine hours per year. Here are the average hours of sunshine per day.

Mar Del Plata - Weather by month

Based on the period 1991-2020

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January, the warmest month of the year, is generally a warm month. The average temperature is of 20.4 °C (69 °F), with a minimum of 14.5 °C (58.1 °F) and a maximum of 26.4 °C (79.5 °F).
On the coldest nights of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to 3.5 °C (38.3 °F) in January 2005.
On the warmest days of the month, the temperature usually reaches around 34.5 °C (94.5 °F). However, it reached 39 °C (102.2 °F) in January 2014.
Precipitation amounts to 91 mm (3.6 in), distributed over 7 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is 17 kph (10 mph).
The average sea temperature is of 19 °C (66 °F). Therefore, the sea is very cool for swimming.

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February is generally a warm month. The average temperature is of 19.9 °C (68 °F), with a minimum of 14.3 °C (57.7 °F) and a maximum of 25.5 °C (77.9 °F).
On the coldest nights of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to 4.7 °C (40.5 °F) in February 2018.
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 38.2 °C (100.8 °F) in February 2007.
Precipitation amounts to 104 mm (4.1 in), distributed over 7 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 15 kph (10 mph).
The average sea temperature is of 19.5 °C (67 °F). Therefore, the sea is very cool for swimming.

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March is generally a warm month. The average temperature is of 18.4 °C (65 °F), with a minimum of 12.9 °C (55.2 °F) and a maximum of 23.8 °C (74.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 4.5 °C (40 °F). However, it dropped to 0 °C (32 °F) in March 2013.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 31 °C (88 °F). However, it reached 34.9 °C (94.8 °F) in March 2009.
Precipitation amounts to 95 mm (3.7 in), distributed over 7 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 18.5 °C (65.5 °F). Therefore, the sea is very cool for swimming.

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April is generally a very mild month. The average temperature is of 15.0 °C (59 °F), with a minimum of 9.5 °C (49.1 °F) and a maximum of 20.4 °C (68.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 2 °C (35.5 °F). However, it dropped to -3 °C (26.6 °F) in April 2001.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 27.5 °C (82 °F). However, it reached 32.5 °C (90.5 °F) in April 2004.
Precipitation amounts to 97 mm (3.8 in), distributed over 7 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 16 °C (61 °F). Therefore, the sea is cold for swimming.

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May is generally a mild month. The average temperature is of 11.8 °C (53 °F), with a minimum of 6.7 °C (44.1 °F) and a maximum of 16.9 °C (62.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1 °C (30.5 °F). However, it dropped to -3.7 °C (25.3 °F) in May 2006.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 24 °C (75 °F). However, it reached 28.5 °C (83.3 °F) in May 1997.
Precipitation amounts to 60 mm (2.4 in), distributed over 6 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 13.5 °C (56 °F). Therefore, the sea is very cold for swimming.

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June is generally a mild month. The average temperature is of 8.9 °C (48 °F), with a minimum of 4 °C (39.2 °F) and a maximum of 13.8 °C (56.8 °F).
On the coldest nights, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -5 °C (23 °F) in June 2002.
On the warmest days, the temperature usually reaches around 19.5 °C (67.5 °F). However, it reached 25.5 °C (77.9 °F) in June 2003.
Precipitation amounts to 66 mm (2.6 in), distributed over 6 days.
The day lasts on average 9 hours and 35 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 4 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 14 kph (8 mph).
The average sea temperature is of 10.5 °C (51.5 °F). Therefore, the sea is very cold for swimming.

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July, the coldest month of the year, is generally a quite mild month. The average temperature is of 7.9 °C (46 °F), with a minimum of 3.2 °C (37.8 °F) and a maximum of 12.6 °C (54.7 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -8.3 °C (17.1 °F) in July 1995.
On the warmest days of the month, the temperature usually reaches around 19.5 °C (67.5 °F). However, it reached 23.9 °C (75 °F) in July 2006.
Precipitation amounts to 58 mm (2.3 in), distributed over 6 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 14 kph (8 mph).
The average sea temperature is of 9 °C (48 °F). Therefore, the sea is very cold for swimming.

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August is generally a mild month. The average temperature is of 9.4 °C (49 °F), with a minimum of 4.2 °C (39.6 °F) and a maximum of 14.7 °C (58.5 °F).
On the coldest nights of the month, the temperature usually drops to around -2.5 °C (27 °F). However, it dropped to -5 °C (23 °F) in August 1992.
On the warmest days of the month, the temperature usually reaches around 22.5 °C (73 °F). However, it reached 29.9 °C (85.8 °F) in August 2009.
Precipitation amounts to 64 mm (2.5 in), distributed over 6 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 8.5 °C (47 °F). Therefore, the sea is very cold for swimming.

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September is generally a mild month. The average temperature is of 10.7 °C (51 °F), with a minimum of 5.5 °C (41.9 °F) and a maximum of 15.9 °C (60.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -2 °C (28.5 °F). However, it dropped to -4.5 °C (23.9 °F) in September 2003.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 24.5 °C (75.5 °F). However, it reached 30 °C (86 °F) in September 1995.
Precipitation amounts to 63 mm (2.5 in), distributed over 6 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 15 kph (10 mph).
The average sea temperature is of 9 °C (48 °F). Therefore, the sea is very cold for swimming.

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October is generally a mild month. The average temperature is of 13.4 °C (56 °F), with a minimum of 8.1 °C (46.6 °F) and a maximum of 18.6 °C (65.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0.5 °C (32.5 °F). However, it dropped to -3 °C (26.6 °F) in October 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 28 °C (82.5 °F). However, it reached 30.1 °C (86.2 °F) in October 2008.
Precipitation amounts to 83 mm (3.3 in), distributed over 7 days.
The day lasts on average 13 hours and 5 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 11 °C (51.5 °F). Therefore, the sea is very cold for swimming.

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November is generally a very mild month. The average temperature is of 16 °C (61 °F), with a minimum of 10.3 °C (50.5 °F) and a maximum of 21.7 °C (71.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 2 °C (36 °F). However, it dropped to -0.5 °C (31.1 °F) in November 2007.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 30 °C (86 °F). However, it reached 32.7 °C (90.9 °F) in November 1991.
Precipitation amounts to 80 mm (3.1 in), distributed over 8 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 13.5 °C (56.5 °F). Therefore, the sea is very cold for swimming.

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December is generally a warm month. The average temperature is of 19 °C (66 °F), with a minimum of 12.8 °C (55 °F) and a maximum of 25.2 °C (77.4 °F).
On the coldest nights of the month, the temperature usually drops to around 4.5 °C (40 °F). However, it dropped to 1 °C (33.8 °F) in December 1993.
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 38.3 °C (100.9 °F) in December 1998.
Precipitation amounts to 85 mm (3.3 in), distributed over 6 days.
The day lasts on average 14 hours and 50 minutes. So the days are long. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 8.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 16.5 °C (61.5 °F). Therefore, the sea is cold for swimming.