Climate and average weather in Santa Clara del Mar

In Santa Clara del Mar, the summers are warm, showery, and mostly clear and the winters are cool and partly cloudy.

Best: late October to early May

Over the course of the year, the temperature in Santa Clara del Mar typically varies from 6°C to 25°C, and is rarely below 2°C or above 30°C. January is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Santa Clara del Mar for warm-weather activities is from late October to early May.

Hottest
Jan
25°
Coldest
Jul
Wettest
Oct
83 mm
Driest
May
48 mm
Rain / yr
824 mm
92 wet days
Daylight
9.4–14.6 h
shortest–longest
Elevation
10 m
37.8°S
Clearest
Dec
45% cloud

Santa Clara del Mar weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late October to early May.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Santa Clara del Mar, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.9 months, from November 29 to March 26, with daily high temperatures above 21°C. The hottest month of the year in Santa Clara del Mar is January, with an average high of 25°C and low of 17°C.

The cool season lasts 3.4 months, from May 30 to September 10, with daily high temperatures below 14°C. The coldest month of the year in Santa Clara del Mar is July, with an average low of 6°C and high of 12°C.

Days typically run about 7°C warmer than nights year-round.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2517
Feb2417
Mar2215
Apr1912
May1610
Jun137
Jul126
Aug137
Sep158
Oct1710
Nov2012
Dec2315

Average hourly temperature in Santa Clara del Mar

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on January afternoons, near 25°C, and coldest before dawn in July, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Santa Clara del Mar weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 17°818.514.37.4
Feb24° / 17°747.613.57.4
Mar22° / 15°727.912.37.2
Apr19° / 12°80811.16.5
May16° / 10°486.5105.3
Jun13° / 596.29.43.9
Jul12° / 536.49.63.4
Aug13° / 606.810.54.1
Sep15° / 607.111.74.7
Oct17° / 10°839.3135.7
Nov20° / 12°839.4146.6
Dec23° / 15°70814.67.4

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Santa Clara del Mar gets about 824 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 5.9 months, from around Sep 26 to Mar 24, peaking in November at about 32% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 2.

October is the wettest month by volume, with 83 mm over about 9 wet days; May is the driest, with 48 mm.

0%10%20%30%40%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetNov 5 · 32%Jun 2 · 19%
Rain on a day (%)Rain days
Jan279
Feb278
Mar268
Apr268
May217
Jun216
Jul216
Aug227
Sep247
Oct309
Nov309
Dec268

Monthly rainfall

Over a full year, Santa Clara del Mar collects about 824 mm of rain across 92 wet days — roughly 69 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 83 mm, while May is the driest at just 48 mm. The three wettest months alone bring about 30% of the year’s total.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec817472804859536060838370
Rainfall (mm)Rain days
Jan819
Feb748
Mar728
Apr808
May487
Jun596
Jul536
Aug607
Sep607
Oct839
Nov839
Dec708

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Santa Clara del Mar, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around October 26 and lasts for 5.9 months, ending around April 24. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 65% of the time on average.

The cloudier part of the year begins around April 25 and lasts for 6.0 months, ending around October 25. The cloudiest month is July, when it is overcast or mostly cloudy 57% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecJan 14 · 66%Jul 14 · 42%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6535
Feb6139
Mar5842
Apr5446
May4555
Jun4357
Jul4357
Aug4753
Sep4852
Oct5050
Nov5941
Dec6238

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 14 h 36 min of light; the shortest, around June 10, only 9 h 24 min — a swing of roughly 5 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.35:498:10
Feb13.56:217:48
Mar12.36:517:09
Apr11.17:206:21
May10.07:475:45
Jun9.48:085:32
Jul9.68:075:44
Aug10.57:386:10
Sep11.76:526:37
Oct13.06:057:05
Nov14.05:337:38
Dec14.65:288:04

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Santa Clara del Mar averages about 11 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 8 and 15 days.

The sunnier stretch runs 5.6 months, from around Nov 4 to Apr 23. The sunniest month is January, with roughly 15 sunny days (mixed).

The greyest month is May, down near 9 sunny days — about 35% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 1015 daysMay 278 days
Sunny daysSky
Jan15Mixed
Feb12Mixed
Mar13Mixed
Apr11Mixed
May10Mixed
Jun9Mixed
Jul9Mixed
Aug10Mixed
Sep10Mixed
Oct10Mixed
Nov13Mixed
Dec15Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Santa Clara del Mar, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.2 months, from around December 3 to April 8. The muggiest month is January, when the air feels humid, muggy or worse about 49% of the time.

The most comfortable stretch runs from around April 9 to December 2, and June is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 13 · 100%Jan 30 · 45%muggycomfortablehumiddryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan272429200
Feb252129231
Mar342726121
Apr6425920
May8513300
Jun963000
Jul991000
Aug982000
Sep973000
Oct8514200
Nov6329800
Dec42302170

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Santa Clara del Mar is steady company: average speeds sit near 17 km/hlight breeze — in every month of the year, with no meaningful windy or calm season.

0510152025JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezebreezyDec 7 · 18 km/hMay 13 · 16 km/h
Wind speed (km/h)Feels
Jan18light breeze
Feb17light breeze
Mar17light breeze
Apr17light breeze
May17light breeze
Jun18light breeze
Jul18light breeze
Aug18light breeze
Sep18light breeze
Oct18light breeze
Nov18light breeze
Dec18light breeze

Best time to visit Santa Clara del Mar

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Santa Clara del Mar throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late April, Santa Clara del Mar is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Santa Clara del Mar for general outdoor tourist activities is from late October to early May, with a peak score in the second week of January.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationJan 14 · 7.5

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan7.4good
Feb7.4good
Mar7.2good
Apr6.5good
May5.3fair
Jun3.9fair
Jul3.4poor
Aug4.1fair
Sep4.7fair
Oct5.7good
Nov6.6good
Dec7.4good

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Santa Clara del Mar for hot-weather activities is from early December to mid March, with a peak score in the second week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJan 11 · 6.6

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Santa Clara del Mar, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around January (highs near 25°C), the essentials are light clothes, rain gear and sun protection. In the cold season around July (highs near 12°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Santa Clara del Mar sees daytime highs around 25°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

Sea temperature near Santa Clara del Mar

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

The sea offshore is warmest in February at about 21°C and coldest in August near 10°C.

It's comfortable for a long swim from Jan 21 to Mar 13 — about 1.7 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb21Refreshing
Mar20Refreshing
Apr18Cool
May15Cool
Jun13Bracing
Jul11Bracing
Aug10Bracing
Sep11Bracing
Oct13Bracing
Nov15Cool
Dec18Cool

UV index (midday) in Santa Clara del Mar by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Santa Clara del Mar peaks around December 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeDec 22UV 12Jun 20UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar8Very high
Apr5High
May3Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep5Moderate
Oct7Very high
Nov10Extreme
Dec12Extreme

Average hourly UV index in Santa Clara del Mar

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in December the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan96.5
Feb8.56
Mar74.5
Apr50
May1.50
Jun00
Jul00
Aug00
Sep50
Oct73.5
Nov8.56
Dec97
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Santa Clara del Mar is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun990
Jul970
Aug990
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Santa Clara del Mar banks about 1,766 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan327
Feb291
Mar274
Apr172
May84
Jun6
Jul0
Aug4
Sep34
Oct110
Nov185
Dec280

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Santa Clara del Mar receives about 4.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.9 and 7.6 kWh/m².

The brighter stretch of the year lasts 5.8 months, from around Sep 25 to Mar 20. The brightest month is December, averaging about 7.5 kWh/m² (intense).

The dimmest month is June, down near 1.9 kWh/m² — roughly 74% less than the December peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 227.6 kWhJun 191.9 kWh
Solar energy (kWh/m²)Level
Jan7.2Intense
Feb6.2Intense
Mar4.8Bright
Apr3.4Moderate
May2.4Moderate
Jun1.9Dim
Jul2.1Moderate
Aug3.0Moderate
Sep4.2Bright
Oct5.5Bright
Nov6.8Intense
Dec7.5Intense

Where is Santa Clara del Mar?

Santa Clara del Mar sits at 37.8°S, 57.5°W, 10 m above sea level, in Argentina. The nearest listed city is Mar del Plata, 19 km away.

Topography around Santa Clara del Mar

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Clara del Mar.

Within 3 km, the terrain around Santa Clara del Mar has only modest variations in elevation — a maximum elevation change of 35 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Santa Clara del Mar is covered by water (30%), grassland (25%) and cropland (21%) within 3 km, water (42%), cropland (27%) and grassland (24%) within 16 km, and grassland (34%), water (32%) and cropland (29%) within 80 km.

3 km
35 m
16 km
52 m
80 km
384 m
treesgrasslandcroplandartificial surfaceswaterwetland
Nearby: Mar del Plata 19 km · Miramar 57 km · Balcarce 66 km · Villa Gesell 79 km · General Juan Madariaga 98 km · Pinamar 98 km · Ayacucho 115 km · Necochea 134 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santa Clara del Mar (-37.8344°, -57.5075°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).