Current time in Rio das Ostras, Brazil right now

It is 8:18 am in Rio das Ostras, Brazil 🇧🇷 right now, on Monday, September 28, 2026. The city keeps America/Sao_Paulo, which is BRT at UTC-3, so Rio das Ostras is 3 hours behind of UTC, where it is 11:18 am. The sun rose in Rio das Ostras at 5:31 am and sets at 5:46 pm, which is 12 hours 14 minutes of daylight.

What time is it in Rio das Ostras right now?

The time in Rio das Ostras, Brazil is 8:18 am, 08:18 on a 24 hour clock, on Monday September 28, 2026. The reading above ticks from your own device against the America/Sao_Paulo rules, so it stays right through a clock change rather than drifting an hour out twice a year.

Rio das Ostras sits at 22.53 degrees south and 41.95 degrees west, inside the tropics, south of the equator and 2,505 km from the equator. Its clock is set to a zone whose nominal meridian is 45.0 degrees west, and the city itself is 3.1 degrees east of that line. Those 3.1 degrees are worth 12 minutes 13 seconds of sun time, which is most of why solar noon here lands at 11:38 am rather than on the stroke of twelve.

Rio das Ostras time zone and UTC offset

The IANA zone for Rio das Ostras, Brazil is America/Sao_Paulo. Right now it is running at UTC-3 and the abbreviation in force is BRT. Rio das Ostras does not change its clocks at any point in the year. The offset stays at UTC-3 in January and in July alike, so no conversion involving Rio das Ostras ever needs a seasonal footnote.

Daylight hours in Rio das Ostras today

The sun rose in Rio das Ostras at 5:31 am and sets at 5:46 pm, which is 12 hours 14 minutes of daylight. Solar noon, the instant the sun stands at its highest over Rio das Ostras, is at 11:38 am, which is 22 minutes before clock noon. The sun's declination today is -2.18 degrees, so at this latitude it reaches about 69.7 degrees above the horizon at its highest, to the north.

The full month by month picture for this city, the extremes of the year and every twilight band are on the sunrise and sunset page for Rio das Ostras, which works from the same coordinates.

Where Rio das Ostras is on the map

The marker sits at the coordinates this whole page is computed from, so the sun times, the distances and the solar noon above all belong to this exact point rather than to the wider metropolitan area.

Time difference between Rio das Ostras and major cities

Every row below is computed at this instant, so daylight saving on either side is already in it. A positive figure means that city's clock reads later than Rio das Ostras.

Best time to call Rio das Ostras

Treating a working day as 9am to 6pm on both sides, this is the window the two cities genuinely share. Some of these pairs have no shared working hour at all, which is worth knowing before a meeting is proposed.

Other cities in Brazil

We cover 399 cities in Brazil. These are the ones nearest to Rio das Ostras, with the time on their clocks right now.

Cities on America/Sao_Paulo time

293 of our cities keep America/Sao_Paulo, so every one of them reads 8:18 am at this moment and changes its clocks on the same night as Rio das Ostras. Nearest first:

Moon phase over Rio das Ostras tonight

The moon is a waning gibbous tonight, 17.3 days into its cycle and about 93% lit. The next full moon falls on October 26, 2026 at 1:11 am Sao Paulo time, and the next new moon on October 10, 2026 at 12:49 pm. Both are the same instant everywhere on Earth, printed here on the Rio das Ostras clock, which is why the calendar date can differ from the one a reader further east or west sees.

When the clocks change in Rio das Ostras

There is no clock change scheduled in America/Sao_Paulo within the next 400 days, so Rio das Ostras stays at UTC-3 for the whole of that stretch.

That makes Rio das Ostras an easy city to schedule against: a meeting fixed at a given hour here holds its relationship to UTC all year, and only the other end of the call can move.

How far Rio das Ostras is from other cities

Great-circle distance, computed from the coordinates rather than road mileage. The nearest city we cover to Rio das Ostras is Macae, Brazil at 23 km, and the furthest is Uruma, Japan at 18,898 km, which is 94% of the way to being exactly opposite.

The antipode of Rio das Ostras

Dig straight through the centre of the Earth from Rio das Ostras, Brazil and you come out at 22.53 degrees north, 138.06 degrees east. That point is in the Indian Ocean. The nearest city in our catalogue to it is Uruma, Japan, 1,117 km away from the antipode itself, where the clock currently reads 8:18 pm on Monday.

The antipode is worked out by flipping the latitude across the equator and swinging the longitude a half turn: 22.53 degrees south becomes 22.53 degrees north, and 41.95 degrees west becomes 138.06 degrees east. Two thirds of the planet is ocean and the land is unevenly spread, so most antipodes are open water: Rio das Ostras is no exception. The local time at the antipode runs close to UTC+9, roughly twelve hours from Rio das Ostras, because a half turn of longitude is a half turn of the day.

Sunrise and sunset in Rio das Ostras

Today the sun rises in Rio das Ostras at 5:31 am and sets at 5:46 pm, giving 12 hours 14 minutes of daylight. The dedicated page for this city carries the month by month table, the longest and shortest days of 2026, the golden and blue hour bands at both ends of the day, and all three twilight stages: sunrise and sunset times in Rio das Ostras.

Sun and moon in Rio das Ostras today

The sun is up in Rio das Ostras for 12 hours 14 minutes today, from 5:31 am to 5:46 pm. The moon sets in Rio das Ostras at 6:28 am and comes up again at 7:51 pm. The next phase is the last quarter on October 3, 2026. It is 95% lit at the moment, a waning gibbous, thinning by about 4.5 percentage points a day.

Twilight is graded by how far the sun has dropped below the horizon. Civil twilight ends six degrees down, which is roughly the point at which you need a light to read outside. Nautical twilight ends at twelve degrees, when the horizon at sea stops being usable for a sextant sight. Astronomical twilight ends at eighteen degrees, which is full darkness for an observer.

Golden hour is the stretch with the sun between six degrees above the horizon and four below it, and blue hour runs from there down to six degrees below. Neither is literally an hour: each is as long as the sun takes to cross those few degrees, which is minutes near the equator and can be most of the evening at high latitude.

Moonrise and moonset are computed to the moment the moon's upper edge touches a flat horizon, allowing for refraction, for the size of the disc and for the moon's parallax, which together put the centre of the moon at 0.125 degrees above the horizon at the instant it rises. That is a different horizon from the one sunrise uses, and it is why a moonrise time cannot be worked out with a sunrise formula.

Prayer times in Rio das Ostras

Seven days from September 28, 2026, computed for Rio das Ostras, Brazil at 22.53 degrees south, 41.95 degrees west, on the clock of America/Sao_Paulo. The method is Muslim World League (Muslim World League, Mecca), which puts Fajr at 18.0 degrees below the horizon and Isha at 17.0 degrees. Asr uses the Standard shadow ratio of 1, which is the Shafi'i, Maliki and Hanbali position.

Dhuhr is solar noon at Rio das Ostras, Brazil, the instant the Sun crosses the local meridian, so it moves with longitude inside the time zone and with the equation of time through the year rather than sitting at a fixed clock reading. Sunrise and Maghrib are the standard refracted horizon, the same 0.833 degrees every almanac uses. Every figure above is computed from the Sun's position for this exact coordinate; none of it is copied from a table.

Different methods disagree, and that is expected rather than an error. Fajr under ISNA at 15 degrees comes later than Fajr under Egyptian General Authority of Survey at 19.5 degrees, by twenty minutes or more depending on latitude and season. Follow whichever your local mosque follows.

Qibla direction from Rio das Ostras

From Rio das Ostras, Brazil the qibla is 67.1 degrees on a true compass, which is east-northeast, or 22.9 degrees north of due east. The Kaaba is 10,115 km away, 6,285 miles, measured over the surface of the Earth.

That figure is the initial bearing of the great circle from Rio das Ostras, Brazil to 21.4225 degrees north, 39.8262 degrees east, which is the Kaaba inside Masjid al-Haram.

The bearing is measured from true north, not magnetic north. A magnetic compass points at the magnetic pole, and the difference between the two can be anything from nothing to more than twenty degrees depending where you are, so check your compass reading against magnetic declination for Rio das Ostras, Brazil before you use it. A phone compass set to true north, or the shadow of a vertical stick at local solar noon, avoids the problem entirely.

Rio das Ostras time now: common questions

What time is it in Rio das Ostras, Brazil right now?

8:18 am on Monday September 28, 2026. Rio das Ostras runs on BRT, UTC-3.

What time zone is Rio das Ostras in?

America/Sao_Paulo, currently BRT at UTC-3. 293 of the cities on this site keep that zone.

What is the UTC offset for Rio das Ostras?

UTC-3 at this instant. It is UTC-3 all year round, with no seasonal change.

Does Rio das Ostras observe daylight saving time?

No. Rio das Ostras stays on UTC-3 for the whole year.

How many hours ahead or behind is Rio das Ostras of New York?

Rio das Ostras is 1 hour ahead of New York, where it is 7:18 am right now.

What time does the sun set in Rio das Ostras today?

5:46 pm, after a sunrise at 5:31 am and 12 hours 14 minutes of daylight.

What is on the exact opposite side of the Earth from Rio das Ostras?

22.53 degrees north, 138.06 degrees east, in the Indian Ocean.

When is the best time to call Rio das Ostras from London?

Between 9:00 am and 2:00 pm in Rio das Ostras, which is 1:00 pm to 6:00 pm in London.

Nearby city clocks

All cities · Timezone converter · Sunrise and sunset · Moon phases