Climate and average weather in Sete Rios

In Sete Rios, the summers are warm, dry, and clear and the winters are cool and partly cloudy.

Best: late May to early October

Over the course of the year, the temperature in Sete Rios typically varies from 10°C to 24°C, and is rarely below 7°C or above 29°C. August is the hottest month of the year, while January is the coldest.

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

Hottest
Aug
24°
Coldest
Jan
10°
Wettest
Nov
82 mm
Driest
Jul
2 mm
Rain / yr
548 mm
75 wet days
Daylight
9.3–14.7 h
shortest–longest
Elevation
81 m
38.7°N
Clearest
Jul
18% cloud

Sete Rios 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 May to early October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 3.6 months, from June 13 to September 30, with daily high temperatures above 22°C. The hottest month of the year in Sete Rios is August, with an average high of 24°C and low of 18°C.

The cool season lasts 3.6 months, from November 23 to March 10, with daily high temperatures below 16°C. The coldest month of the year in Sete Rios is January, with an average low of 10°C and high of 14°C.

Days typically run about 5°C warmer than nights year-round.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan1410
Feb1510
Mar1611
Apr1712
May1914
Jun2216
Jul2418
Aug2418
Sep2317
Oct2016
Nov1713
Dec1511

Average hourly temperature in Sete Rios

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 August afternoons, near 24°C, and coldest before dawn in January, near 10°C.

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

Sete Rios 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
Jan14° / 10°688.99.64.2
Feb15° / 10°517.510.54.6
Mar16° / 11°538.111.75.5
Apr17° / 12°518.4136.0
May19° / 14°425.914.17.1
Jun22° / 16°102.114.78.4
Jul24° / 18°20.614.49.3
Aug24° / 18°4113.59.2
Sep23° / 17°294.112.38.3
Oct20° / 16°778.9116.7
Nov17° / 13°8210.29.95.5
Dec15° / 11°799.49.34.5

Chance of rain

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

Sete Rios gets about 548 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 7.3 months, from around Oct 3 to May 13, peaking in October at about 35% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 16.

November is the wettest month by volume, with 82 mm over about 10 wet days; July is the driest, with 2 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetOct 27 · 35%Jul 16 · 2%
Rain on a day (%)Rain days
Jan299
Feb278
Mar268
Apr288
May196
Jun72
Jul21
Aug31
Sep134
Oct299
Nov3310
Dec319

Monthly rainfall

Over a full year, Sete Rios collects about 548 mm of rain across 75 wet days — roughly 46 mm in an average month.

It doesn’t fall evenly. November is the wettest month with 82 mm, while July is the driest at just 2 mm. The three wettest months alone bring about 43% of the year’s total.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec6851535142102429778279
Rainfall (mm)Rain days
Jan689
Feb518
Mar538
Apr518
May426
Jun102
Jul21
Aug41
Sep294
Oct779
Nov8210
Dec799

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Sete Rios, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around May 14 and lasts for 4.8 months, ending around October 6. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 93% of the time on average.

The cloudier part of the year begins around October 7 and lasts for 7.2 months, ending around May 13. The cloudiest month is December, when it is overcast or mostly cloudy 52% 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%JanFebMarAprMayJunJulAugSepOctNovDecJul 27 · 94%Dec 10 · 46%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan5347
Feb5347
Mar5842
Apr6040
May6733
Jun8020
Jul937
Aug919
Sep7921
Oct5941
Nov5446
Dec4852

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 June 11, brings about 14 h 42 min of light; the shortest, around January 1, only 9 h 18 min — a swing of roughly 5 h 24 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.67:595:33
Feb10.57:366:06
Mar11.76:566:37
Apr13.06:077:07
May14.15:307:36
Jun14.75:167:58
Jul14.45:287:56
Aug13.55:557:26
Sep12.36:246:38
Oct11.06:535:51
Nov9.97:265:17
Dec9.37:545:12

Sunny days

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

Sete Rios averages about 15 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 26 days.

The sunnier stretch runs 4.5 months, from around May 21 to Oct 4. The sunniest month is July, with roughly 25 sunny days (brilliant).

The greyest month is December, down near 10 sunny days — about 58% fewer than the July peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2726 daysDec 510 days
Sunny daysSky
Jan12Mixed
Feb11Mixed
Mar13Mixed
Apr12Mixed
May15Mixed
Jun20Bright
Jul26Brilliant
Aug25Brilliant
Sep19Bright
Oct13Mixed
Nov11Mixed
Dec11Mixed

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 Sete Rios, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.7 months, from around June 12 to November 1. The muggiest month is August, when the air feels humid, muggy or worse about 61% of the time.

The most comfortable stretch runs from around November 2 to June 11, and January 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%JanFebMarAprMayJunJulAugSepOctNovDecJan 1 · 100%Aug 17 · 37%humiddrycomfortablecomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan92800
Feb96400
Mar95500
Apr861400
May603550
Jun2454220
Jul742502
Aug534556
Sep1240444
Oct3139273
Nov682570
Dec871300

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.

Across the year, average wind speed in Sete Rios is typically light breeze, near 17 km/h, and varies little with the seasons.

The windier part of the year lasts 5.0 months, from around Mar 27 to Aug 26. The windiest month is July, averaging about 20 km/h (light breeze).

The calmer part of the year runs from around Aug 27 to Feb 23, with October the calmest month at about 16 km/h.

0510152025JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezebreezyJul 11 · 20 km/hOct 13 · 15 km/h
Wind speed (km/h)Feels
Jan17light breeze
Feb17light breeze
Mar17light breeze
Apr17light breeze
May18light breeze
Jun18light breeze
Jul20light breeze
Aug18light breeze
Sep16light breeze
Oct16light breeze
Nov16light breeze
Dec17light breeze

Best time to visit Sete Rios

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late September, Sete Rios 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 Sete Rios for general outdoor tourist activities is from late May to early October, with a peak score in the third week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 19 · 9.4

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
Jan4.3fair
Feb4.6fair
Mar5.5fair
Apr6.0good
May7.1good
Jun8.4ideal
Jul9.3ideal
Aug9.2ideal
Sep8.3ideal
Oct6.7good
Nov5.5fair
Dec4.5fair

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 Sete Rios for hot-weather activities is from late June to mid September, with a peak score in the first week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 3 · 8.1

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 Sete Rios, 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 August (highs near 24°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 14°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Sete Rios sees daytime highs around 24°C and nights near 18°C. Pack sun protection. Worth having: light clothes.

Sea temperature near Sete Rios

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

The sea at the nearest coast (about 23 km away) is warmest in September at about 19°C and coldest in February near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec16Cool

UV index (midday) in Sete Rios 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 Sete Rios peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 15UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5High
Nov3Moderate
Dec2Low

Average hourly UV index in Sete Rios

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 July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5.5 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)
Jan00
Feb10
Mar60
Apr74
May7.53.5
Jun85
Jul8.55.5
Aug7.54.5
Sep60
Oct4.50
Nov00
Dec00
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Sete Rios 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
Jun1000
Jul1000
Aug1000
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. Sete Rios banks about 2,322 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

01,0002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan57
Feb61
Mar114
Apr144
May211
Jun275
Jul331
Aug348
Sep307
Oct249
Nov143
Dec83

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.

Sete Rios receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.0 and 7.6 kWh/m².

The brighter stretch of the year lasts 6.1 months, from around Mar 21 to Sep 23. The brightest month is July, averaging about 7.6 kWh/m² (intense).

The dimmest month is December, down near 2.0 kWh/m² — roughly 73% less than the July peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseJul 97.6 kWhDec 192.0 kWh
Solar energy (kWh/m²)Level
Jan2.3Moderate
Feb3.3Moderate
Mar4.6Bright
Apr5.8Bright
May6.8Intense
Jun7.5Intense
Jul7.6Intense
Aug6.8Intense
Sep5.3Bright
Oct3.6Moderate
Nov2.5Moderate
Dec2.0Moderate

Where is Sete Rios?

Sete Rios sits at 38.7°N, 9.2°W, 81 m above sea level, in Portugal. The nearest listed city is Cidade Universitária, 1.0 km away.

Topography around Sete Rios

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sete Rios.

Within 3 km, the terrain around Sete Rios has only modest variations in elevation — a maximum elevation change of 199 m around an average of 93 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 402 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Sete Rios is covered by artificial surfaces (66%) and trees (26%) within 3 km, water (32%), artificial surfaces (28%) and grassland (20%) within 16 km, and water (40%) and grassland (30%) within 80 km.

3 km
199 m
16 km
402 m
80 km
656 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
Nearby: Cidade Universitária 1.0 km · Campo Grande 2.0 km · Alvalade 2.0 km · Areeiro 2.0 km · Lisbon 2.0 km · Campo De Ourique 2.0 km · São Jorge de Arroios 2.0 km · Carnide 3.0 km

Portugal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$32,082
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2022
Road deaths
8.2
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 612
Religion
Catholic 68%not applicable 13%no religion 12%no response 2%

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 Sete Rios (38.7413°, -9.1613°, elevation 81 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).