AI-generatedItaguaí at a glance
- Best time
- Apr – Oct
- Warmest month
- Feb · 32°
- Warmest sea
- Feb · 26.0°
- Sunshine a year
- 2,230 h
- Rain a year
- 1,040 mm
- Climate
- Tropical
- Time zone
- UTC−3
- Elevation
- 31 m
Climate in Itaguaí
Itaguaí has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. February is the warmest month with average highs of 32 °C, while July is the coolest at 26 °C. With around 2,230 hours of sunshine a year, Itaguaí is sunny; February is the sunniest month with 6.9 hours a day.
Holiday weather through the year
Best time to visit Itaguaí
The best time to visit Itaguaí is from April to October. For a beach holiday – sea from 21 °C, warm and mostly dry – go from April to October. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The rainy season is from November to March; the wettest month is January with 163 mm.
Itaguaí through the seasons
How the weather changes over the seasons, with averages for each.
Itaguaí in the dry season
Apr – Oct
Good
- 26–29 °C by day
- Sea 23 °C
- 5.9 h of sun a day
- 62 rainy days in all
Itaguaí in the rainy season
Nov – Mar
Good
- 28–32 °C by day
- Sea 25 °C
- 6.4 h of sun a day
- 74 rainy days in all
Which month for what?
Beach & swimming
Apr – Oct
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Rainy months
Nov – Mar
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Itaguaí for you.
Your best months: April – June
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: April – October
Where to go in OctoberSea temperature in October
Good forBeach & swimming
A typical day in October
- Morning, 08:00: about 24°
- Midday, 13:00: about 28°
- Afternoon, 16:00: about 27°
- Evening, 20:00: about 23°
- Night, 23:00: about 22°
05:2317:58
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:09–05:53 · evening 17:28–18:12
- Blue hour
- Morning 05:00–05:09 · evening 18:12–18:21
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Itaguaí compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs stay at about 28° from start to end. The days get 0.6 h longer.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 28° | 28° |
| Night-time low | 19° | 20° |
| Sea | 22° | 22° |
| Daylight | 12.3 h | 12.9 h |
What is the weather like in Itaguaí in October?
In October, Itaguaí is hot: daytime highs average 29 °C, and nights cool down to about 19 °C. The sea averages 22.1 °C – refreshing for a swim. Expect around 5.8 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 83 mm in total. On about 12 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Itaguaí.
More details for October
- Daylight
- 12 h 35 min05:23 – 17:58
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 21 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 67 %on averageAll months
- Hot days
- 12 days30 °C or moreAll months
- Time zone
- UTC−3offset from UTC
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %73 %
- Sunshineweight 20 %47 %
- Few rainy daysweight 20 %46 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Compare two months in Itaguaí
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
April has the better holiday weather in Itaguaí: score 81 against 72. Daytime highs are about the same. The sea is 3 °C warmer in April. April has one rainy day fewer. The sun shines an hour longer a day in April.
| Month | October | April |
|---|---|---|
| Holiday weather score | 72 | 81better |
| Daytime high | 29° | 29° |
| Night-time low | 19° | 21° |
| Sea | 22.1° | 25.4° |
| Sunshine | 5.8 h | 6.3 hbetter |
| Rainy days | 12 | 11better |
| Rainfall | 83 mm | 82 mm |
| Muggy days | 21better | 26 |
Based on the climate averages 1996–2025.
Itaguaí month by month
The typical weather for every month at a glance.
74January31° · Sea 26° · 6.6 h
In January, Itaguaí is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. The sea averages 25.8 °C – pleasant for swimming. The sun shines for around 6.6 hours a day. It is the rainy season: rain falls on about 16 days, totalling 163 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is a good month for a holiday in Itaguaí.
Itaguaí in January77February32° · Sea 26° · 6.9 h
In February, Itaguaí is hot: daytime highs average 32 °C, and even at night it stays warm at around 23 °C. The sea averages 26.0 °C – lovely and warm for swimming. The sun shines for around 6.9 hours a day. It is the rainy season: rain falls on about 13 days, totalling 113 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is a good month for a holiday in Itaguaí.
Itaguaí in February75March31° · Sea 26° · 6.4 h
In March, Itaguaí is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. The sea averages 26.0 °C – lovely and warm for swimming. Expect around 6.4 hours of sunshine a day. It is the rainy season: rain falls on about 15 days, totalling 118 mm. On about 18 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in Itaguaí.
Itaguaí in March81April29° · Sea 25° · 6.3 h
In April, Itaguaí is hot: daytime highs average 29 °C, and even at night it stays warm at around 21 °C. The sea averages 25.4 °C – pleasant for swimming. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 82 mm in total. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is an excellent month for a holiday in Itaguaí.
Itaguaí in April80May27° · Sea 24° · 5.7 h
In May, Itaguaí is hot: daytime highs average 27 °C, and nights cool down to about 18 °C. The sea averages 23.8 °C – pleasant for swimming. Expect around 5.7 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 61 mm in total. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is an excellent month for a holiday in Itaguaí.
Itaguaí in May80June26° · Sea 23° · 5.6 h
In June, Itaguaí is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 22.6 °C – refreshing for a swim. Expect around 5.6 hours of sunshine a day. Rain falls on about 7 days, adding up to 37 mm. All in all, June is an excellent month for a holiday in Itaguaí.
Itaguaí in June77July26° · Sea 22° · 5.6 h
In July, Itaguaí is warm: daytime highs average 26 °C, and nights cool down to about 16 °C. The sea averages 21.9 °C – refreshing for a swim. Expect around 5.6 hours of sunshine a day. Rain falls on about 7 days, adding up to 39 mm. All in all, July is a good month for a holiday in Itaguaí.
Itaguaí in July77August27° · Sea 21° · 6.3 h
In August, Itaguaí is hot: daytime highs average 27 °C, and nights cool down to about 16 °C. The sea averages 21.4 °C – refreshing for a swim. Expect around 6.3 hours of sunshine a day. Rain falls on about 7 days, adding up to 38 mm. On about 8 days the thermometer climbs to 30 °C or more. All in all, August is a good month for a holiday in Itaguaí.
Itaguaí in August74September28° · Sea 22° · 6.0 h
In September, Itaguaí is hot: daytime highs average 28 °C, and nights cool down to about 18 °C. The sea averages 21.7 °C – refreshing for a swim. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 57 mm in total. On about 11 days the thermometer climbs to 30 °C or more. All in all, September is a good month for a holiday in Itaguaí.
Itaguaí in September72October29° · Sea 22° · 5.8 h
In October, Itaguaí is hot: daytime highs average 29 °C, and nights cool down to about 19 °C. The sea averages 22.1 °C – refreshing for a swim. Expect around 5.8 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 83 mm in total. On about 12 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Itaguaí.
Itaguaí in October69November28° · Sea 23° · 5.7 h
In November, Itaguaí is hot: daytime highs average 28 °C, and even at night it stays warm at around 20 °C. The sea averages 22.6 °C – refreshing for a swim. Expect around 5.7 hours of sunshine a day. It is the rainy season: rain falls on about 15 days, totalling 115 mm. On about 10 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a good month for a holiday in Itaguaí.
Itaguaí in November75December30° · Sea 24° · 6.5 h
In December, Itaguaí is hot: daytime highs average 30 °C, and even at night it stays warm at around 22 °C. The sea averages 24.4 °C – pleasant for swimming. The sun shines for around 6.5 hours a day. It is the rainy season: rain falls on about 15 days, totalling 136 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is a good month for a holiday in Itaguaí.
Itaguaí in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Itaguaí
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Pleasant 15–20°
- Warm 20–24°
- muggy month (15+ muggy days)
PleasantOctober: nights around 19°. Ideal for sleeping, often with the window open. Muggy on about 21 days (dew point 18 °C or more).
The coolest nights are in July (16°), the warmest in February (23°). Tropical nights of 20 °C and more are the rule from November to April; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from May to October. It is muggy (dew point 18 °C or more) on about 240 days a year, mostly from October to May.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 74 | 31° | 23° | 25.8° | 6.6 h | 16 | 163 |
| FebruaryFeb | 77 | 32° | 23° | 26.0° | 6.9 h | 13 | 113 |
| MarchMar | 75 | 31° | 23° | 26.0° | 6.4 h | 15 | 118 |
| AprilApr | 81 | 29° | 21° | 25.4° | 6.3 h | 11 | 82 |
| MayMay | 80 | 27° | 18° | 23.8° | 5.7 h | 10 | 61 |
| JuneJun | 80 | 26° | 17° | 22.6° | 5.6 h | 7 | 37 |
| JulyJul | 77 | 26° | 16° | 21.9° | 5.6 h | 7 | 39 |
| AugustAug | 77 | 27° | 16° | 21.4° | 6.3 h | 7 | 38 |
| SeptemberSep | 74 | 28° | 18° | 21.7° | 6.0 h | 9 | 57 |
| OctoberOct | 72 | 29° | 19° | 22.1° | 5.8 h | 12 | 83 |
| NovemberNov | 69 | 28° | 20° | 22.6° | 5.7 h | 15 | 115 |
| DecemberDec | 75 | 30° | 22° | 24.4° | 6.5 h | 15 | 136 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
22.85° S, 43.78° W · 31 m · America/Sao_Paulo
Sea temperature
Sea temperature in Itaguaí
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 20.6 – 23.5 °C
Swimming season: all year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Itaguaí ranges from 21.4 °C in August to 26.0 °C in February. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea temperature varies from year to year: in February, eight out of ten years were between 24.1 and 27.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 25.8° | 24.3° | 28.0° | pleasant |
| FebruaryFeb | 26.0° | 24.1° | 27.7° | warm |
| MarchMar | 26.0° | 24.5° | 27.5° | warm |
| AprilApr | 25.4° | 24.3° | 26.7° | pleasant |
| MayMay | 23.8° | 22.7° | 24.7° | pleasant |
| JuneJun | 22.6° | 21.7° | 23.7° | refreshing |
| JulyJul | 21.9° | 21.0° | 22.5° | refreshing |
| AugustAug | 21.4° | 20.1° | 22.4° | refreshing |
| SeptemberSep | 21.7° | 20.3° | 22.4° | refreshing |
| OctoberOct | 22.1° | 20.6° | 23.5° | refreshing |
| NovemberNov | 22.6° | 21.2° | 24.4° | refreshing |
| DecemberDec | 24.4° | 22.8° | 25.6° | pleasant |
Sunshine
Sunshine hours in Itaguaí
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.8 of 12.6 hours of daylight in Itaguaí, 46 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Itaguaí: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Itaguaí has about 12 rainy days with 83 mm of rain in total.
UV index
UV index in Itaguaí
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 11 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in December (UV 12).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Itaguaí
How breezy and how cloudy Itaguaí is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Itaguaí typically peaks at 18 km/h during the day: Beaufort 3, gentle breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 67 % of the sky over Itaguaí: mostly cloudy, with about 5.8 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Itaguaí
How often the day gets hot in Itaguaí (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Itaguaí has about 12 hot days, with an average daytime high of 29 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Itaguaí
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Itaguaí in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Itaguaí has its best school-holiday weather during May half-term (score 80) and its weakest during October half-term (score 72).
- 79
Easter holidays
Mar – Apr
Good
- 29 °C by day
- Sea 26 °C
- 6.3 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 80
May half-term
May – Jun
ExcellentBest holidays
- 27 °C by day
- Sea 24 °C
- 5.7 h of sun a day
- 9 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 77
Summer holidays
Jul – Aug
Good
- 27 °C by day
- Sea 22 °C
- 6.1 h of sun a day
- 7 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 72
October half-term
Oct
Good
- 29 °C by day
- Sea 22 °C
- 5.8 h of sun a day
- 12 rainy days a month
Good for: Beach & swimming
- 75
Christmas holidays
Dec – Jan
Good
- 31 °C by day
- Sea 25 °C
- 6.6 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 40 min
- Distance
- 9,280 km
- Time zone
- UTC−3
- Jet lag
- About 3 days (4 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Brazil
- Currency
- Brazilian Real (BRL)
- Language
- Portuguese
- Sockets
- Type C, N · 127 V
- Traffic
- Drives on the right
- Dialling code
- +55
UK plugs need a travel adapter
Only 127 V: chargers marked 100–240 V work, other devices need a voltage converter.
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Itaguaí compared
Put Itaguaí side by side with another destination.
Itaguaí vs Angra dos Reis
In October the holiday weather in Itaguaí and Angra dos Reis is about equally good (score 72 vs 71). During the day Angra dos Reis is 4 °C cooler than Itaguaí. The sea in Angra dos Reis is 1 °C warmer.
| in October | Itaguaí | Angra dos Reis |
|---|---|---|
| Holiday weather score | 72 | 71 |
| Daytime high | 29° | 25° |
| Sea | 22° | 23° |
| Sunshine | 6 h | 6 h |
| Rainy days | 12 | 15 |
| Best time | Apr – Oct | Apr – Sep |
Through the year
Best places in the country
Brazil in October: the best places
In October, Itaguaí ranks 3 among the 31 nearest destinations in this country.
- Guarapari29°23°75
- 2Cabo Frio26°22°74
- 3ItaguaíThis page29°22°72
- 4Armação dos Búzios26°22°72
- 5Ipanema29°22°71
- 6Rio de Janeiro29°22°71
- 7Angra dos Reis25°23°65
- 8Ubatuba25°23°65
Places nearby
Near Itaguaí
Other destinations close by.
Places with a similar climate
Places with a climate like Itaguaí
Destinations whose weather through the year is closest to Itaguaí's – good alternatives.
Frequently asked questions about Itaguaí
When is the best time to visit Itaguaí?
The best time to visit Itaguaí is from April to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Itaguaí?
The sea temperature in Itaguaí ranges from 21.4 °C in August to 26.0 °C in February. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Itaguaí in October?
Yes. In October the sea averages 22.1 °C – refreshing for a swim.
What is the warmest month in Itaguaí?
February is the warmest month, with average highs of 32 °C and nights around 23 °C. July is the coolest month at 26 °C.
When does it rain most in Itaguaí?
The rainy season is from November to March; the wettest month is January with 163 mm. The driest month is June with 37 mm.
How many hours of sunshine does Itaguaí get?
Itaguaí gets around 2,230 hours of sunshine a year. The sunniest month is February with 6.9 hours a day; in June there are 5.6 hours a day.
What time zone is Itaguaí in?
Itaguaí is on UTC−3 all year.
How long is the flight from London to Itaguaí?
A nonstop flight from London to Itaguaí takes about 11 h 40 min, for a straight-line distance of about 9,280 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Itaguaí?
Itaguaí has its best school-holiday weather during May half-term (score 80) and its weakest during October half-term (score 72). Holiday ratings (0–100): Easter holidays 79, May half-term 80, summer holidays 77, October half-term 72, Christmas holidays 75.