SeasonMapMar del Plata weather in January
Argentina
January in Mar del Plata: hot, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Mar del Plata · #265 of 1383 destinations to visit in January · comfort 87/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mar del Plata in January
Mar del Plata's forum calls January ultra-peak season on the Argentine coast, warm but not unbearable, with the beaches at their most crowded of the year. Regulars flag it as the height of the Christmas-to-February summer holiday stretch, and suggest early March as a calmer, still-warm alternative once schools are back in session.
Add your own note from Mar del Plata's card on the map.
Mar del Plata climate normals — January
| Daytime high | 28°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Feels like (high) | 29°C / 84°F | |
| Sea temperature | 20°C / 68°F | 🌊 fresh |
| Rainfall | 65 mm / 2.6 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 15°C / 60°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 14.4 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mar del Plata in January
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdstravelers describe it as peak season, Argentine summer season, Summer holidays in Argentina
Sourced from traveler notes: “Mar del Plata's forum calls January ultra-peak season on the Argentine coast, warm but not unbearable, with the b…” — Tripadvisor community
Peak crowdsBusyShoulder seasonQuiet
Best months for Mar del Plata's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherMar del Plata's weather peaks January–March.
Best weatherFair weatherToughest weather
What's on in Mar del Plata in January
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Sea just about warm enough
1 Jan – 15 Mar · usuallySea warm enoughThe water is only really swimmable in January and February, and it stays that way into early March once the crowds have gone. A wetsuit is normal outside those weeks.
- Season
Argentine summer season
15 Dec – 28 FebSchool holidaysCrowdedBook earlyThe city's population multiplies from mid-December, Bristol beach is sold by the tent and the coast road queues both ways on a Sunday. February is marginally calmer than January.
- Season
Summer theatre season
20 Dec – 28 Feb · usuallySummer season opensHalf of Buenos Aires theatre moves down the coast for the summer and the Avenida Independencia bills comedies and revues nightly. It is the reason a lot of Argentines come at all.
Where is Mar del Plata?
Mar del Plata in January — FAQ
- Is January a good time to visit Mar del Plata?
- January in Mar del Plata: hot, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Mar del Plata on SeasonMap's comfort score (87/100).
- What is the weather like in Mar del Plata in January?
- In January, Mar del Plata averages a daily high of 28.2°C and a low of 15.1°C, with about 65.4 mm of rain over roughly 8.3 rainy days.
- What is the air quality in Mar del Plata in January?
- Mar del Plata has a mean US Air Quality Index of about 27 in January.