Weather in Rio das Ostras

14-day forecast · updated today, Thursday, October 29, at 7:05 am (GMT-3)

Now · mainly clear 72 °F

Feels like: 74 °F
Low / high: 69 / 81 °F
Rain: 89% · 0.22 in
Wind: 9 mph NE

→ 30.04 inHg · steady UV 6 · high

Today in Rio das Ostras: heavy drizzle, 69 °F to 81 °F, with a 89% chance of rain (0.22 in) and a gentle breeze from the northeast (9 mph). Tomorrow, light rain, 69 °F to 80 °F and a 100% chance of rain. The warmest day of the week is Tuesday 3, at 89 °F.

Temperatures for the next 14 days

81° 69°
Today
80° 69°
Fri 30
78° 69°
Sat 31
79° 69°
Sun 1
82° 70°
Mon 2
89° 73°
Tue 3
88° 72°
Wed 4
85° 75°
Thu 5
77° 73°
Fri 6
85° 71°
Sat 7
70° 64°
Sun 8
74° 64°
Mon 9
75° 63°
Tue 10
77° 68°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Heavy drizzle	69 / 81 °F	89% · 0.22 in	13 mph ENE	3.9 ft	4:28 am · 4:07 pm	ECMWF
Fri 30	Light rain	69 / 80 °F	100% · 0.70 in	12 mph NNE	3.7 ft	5:21 am · 4:46 pm	ECMWF
Sat 31	Light drizzle	69 / 78 °F	59% · 0.04 in	9 mph SW	2.7 ft	6:32 am · 5:36 pm	ECMWF
Sun 1	Light drizzle	69 / 79 °F	39% · 0.03 in	9 mph ESE	2.2 ft	9:03 am · 6:56 pm	ECMWF
Mon 2	Drizzle	70 / 82 °F	68% · 0.21 in	11 mph ENE	3.0 ft	11:02 am · 9:14 pm	ECMWF
Tue 3	Drizzle	73 / 89 °F	81% · 0.16 in	10 mph NE	3.1 ft	11:48 am · 10:54 pm	ECMWF
Wed 4	Overcast	72 / 88 °F	36%	7 mph ESE	2.6 ft	12:18 pm · 11:47 pm	ECMWF
Thu 5	Light drizzle	75 / 85 °F	43% · 0.01 in	14 mph SW	2.5 ft	12:41 pm	ECMWF
Fri 6	Light drizzle	73 / 77 °F	56% · 0.11 in	12 mph E	3.1 ft	12:28 am · 1:00 pm	ECMWF
Sat 7	Light rain	71 / 85 °F	62% · 0.41 in	11 mph SW	4.0 ft	1:03 am · 1:19 pm	ECMWF
Sun 8	Rain	64 / 70 °F	53% · 1.72 in	9 mph WSW	6.4 ft	1:36 am · 1:40 pm	ECMWF
Mon 9	Light drizzle	64 / 74 °F	47% · 0.02 in	9 mph SW	5.6 ft	2:08 am · 2:03 pm	ECMWF
Tue 10	Light drizzle	63 / 75 °F	43% · 0.05 in	7 mph ENE	3.3 ft	2:40 am · 2:29 pm	ECMWF
Wed 11	Light rain	68 / 77 °F	57% · 0.41 in	15 mph NE	4.0 ft	3:13 am · 2:57 pm	ECMWF

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Partly cloudy	Partly cloudy	Overcast	Mainly clear	Partly cloudy	Light drizzle	Heavy drizzle	Light drizzle
Temperature	70°	69°	70°	77°	81°	76°	73°	71°
Chance of rain	0%	0%	4%	4%	4%	12%	43%	76%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.01 in	0.04 in	0.01 in
Wind (mph)	9 NNE	10 NE	9 NE	9 NE	13 E	10 E	12 ENE	11 NE
Humidity	76%	79%	83%	71%	70%	84%	88%	92%
UV	0	0	0	5	6	1	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain today: take it with some caution.

What 4 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	81°	80°	78°	79°	82°	89°	88°
AIFS	78°	80°	78°	76°	82°	88°	90°
GFS	77°	77°	79°	76°	78°	79°	87°
ICON	79°	77°	81°	78°	86°	88°	96°
Confidence	high	high	high	high	medium	low	medium

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0.22 in	0.70 in	0.04 in	0.03 in	0.21 in	0.16 in	0
AIFS	0.25 in	0.80 in	0.14 in	0.28 in	0.22 in	0.24 in	0.09 in
GFS	0.44 in	0.16 in	0.07 in	0.24 in	0.26 in	0.36 in	0.76 in
ICON	0.04 in	0.60 in	0.04 in	0.06 in	0	0.13 in	0
Confidence	medium	medium	medium	medium	medium	medium	low

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1327	1223	921	926	1122	1026	720
AIFS	9	8	10	9	13	9	6
GFS	1217	912	68	79	1322	1221	611
ICON	715	613	613	715	921	621	615
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	89%	100%	59%	39%	68%	81%	36%
GFS (GEFS, 31 scenarios)	100%	100%	94%	97%	100%	73%	58%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer and normal rain.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +2.2 °F	Normal	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.5 °F	Normal	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +2.3 °F	Normal	82° / 71°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.0 °F	Normal	82° / 71°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +1.4 °F	Normal	81° / 71°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +2.5 °F	Normal
December	Above +2.7 °F	Normal
January	A bit above +2.2 °F	Normal
February	A bit above +2.3 °F	Normal
March	A bit above +2.3 °F	Normal

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Rio das Ostras climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Rio das Ostras is from June to August: highs of 79 °F, about 6 rainy days a month and 6 hours of sunshine a day.

87° 70°

JanJ
88° 71°

FebF
86° 70°

MarM
83° 68°

AprA
80° 64°

MayM
79° 61°

JunJ
78° 60°

JulJ
78° 61°

AugA
80° 63°

SepS
82° 66°

OctO
83° 67°

NovN
85° 70°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	87°	70°	6.34 in	16	5.7	75°	3.8 ft
FebruaryFeb	88°	71°	5.35 in	11	6.5	75°	3.6 ft
MarchMar	86°	70°	6.43 in	14	5.1	77°	4.1 ft
AprilApr	83°	68°	3.75 in	10	5.4	77°	4.1 ft
MayMay	80°	64°	2.98 in	8	5.4	75°	4.7 ft
JuneJun	79°	61°	1.46 in	5	5.7	73°	4.4 ft
JulyJul	78°	60°	1.24 in	6	5.7	72°	4.6 ft
AugustAug	78°	61°	1.10 in	6	6.3	71°	4.9 ft
SeptemberSep	80°	63°	1.72 in	9	5.0	70°	5.0 ft
OctoberOct	82°	66°	3.28 in	11	4.4	71°	4.7 ft
NovemberNov	83°	67°	5.68 in	16	3.4	72°	4.4 ft
DecemberDec	85°	70°	7.25 in	17	4.2	74°	4.0 ft

Month	Water	Waves
Jan	75°	3.8 ft
Feb	75°	3.6 ft
Mar	77°	4.1 ft
Apr	77°	4.1 ft
May	75°	4.7 ft
Jun	73°	4.4 ft
Jul	72°	4.6 ft
Aug	71°	4.9 ft
Sep	70°	5.0 ft
Oct	71°	4.7 ft
Nov	72°	4.4 ft
Dec	74°	4.0 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 46.57 in of rain on about 128 days and about 1,900 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now72 °Ffeels like 74 °F

Tomorrow69 / 80 °F

It's 72 °F now (feels like 74 °F). Today, 69 °F to 81 °F; tomorrow, 69 °F to 80 °F.

Chance of rain

Today 89% 0.22 in
Fri 30 100% 0.70 in
Sat 31 59% 0.04 in
Sun 1 39% 0.03 in
Mon 2 68% 0.21 in
Tue 3 81% 0.16 in
Wed 4 36%

Today the chance of rain reaches 89%, with 0.22 in in total. The next day with likely rain is Friday 30: 100% and 0.70 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.11 in; last 7 days, 0.78 in.

Humidity and dew point

Humidity79%

Dew point66 °F

Humidity is 79% now and the dew point is 66 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now15 migood

Clouds42%

Visibility is good now (15 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now1

Today's peak6high

Fri 30: 1 · Sat 31: 4 · Sun 1: 7

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8030.0030.20 29.78

Steady now (+0.03 inHg in 3 hours). Over the next 48 hours: −0.16 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 31

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Overcast	66 / 75 °F	0	14 mph NE
Tue 27	Light drizzle	65 / 72 °F	0.07 in	10 mph SSW
Mon 26	Light drizzle	67 / 74 °F	0.07 in	16 mph SW
Sun 25	Light rain	71 / 78 °F	0.37 in	12 mph WSW
Sat 24	Overcast	67 / 84 °F	0	9 mph ENE
Fri 23	Drizzle	69 / 80 °F	0.12 in	11 mph NE
Thu 22	Drizzle	69 / 71 °F	0.17 in	11 mph ENE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light drizzle	67 / 75 °F	0.07 in	8 mph ENE
Tue 20	Drizzle	67 / 74 °F	0.13 in	6 mph SSE
Mon 19	Drizzle	67 / 75 °F	0.20 in	10 mph SW
Sun 18	Drizzle	68 / 77 °F	0.35 in	6 mph ENE
Sat 17	Heavy drizzle	70 / 81 °F	0.37 in	17 mph SW
Fri 16	Heavy drizzle	72 / 83 °F	0.36 in	6 mph NNE
Thu 15	Light showers	71 / 80 °F	0.41 in	6 mph E
Wed 14	Light drizzle	71 / 83 °F	0.04 in	5 mph ESE
Tue 13	Light showers	69 / 83 °F	0.21 in	6 mph E
Mon 12	Drizzle	71 / 82 °F	0.13 in	11 mph W
Sun 11	Light showers	71 / 86 °F	0.29 in	6 mph S
Sat 10	Light showers	72 / 84 °F	0.32 in	9 mph E
Fri 9	Overcast	70 / 89 °F	0	9 mph ENE
Thu 8	Light drizzle	70 / 82 °F	0.00 in	11 mph SW
Wed 7	Light drizzle	71 / 88 °F	0.06 in	9 mph SSW
Tue 6	Drizzle	69 / 81 °F	0.05 in	7 mph SE
Mon 5	Light rain	70 / 82 °F	0.57 in	8 mph SW
Sun 4	Light drizzle	68 / 87 °F	0.12 in	14 mph NE
Sat 3	Rain	66 / 69 °F	1.85 in	13 mph ENE
Fri 2	Rain	69 / 76 °F	2.00 in	8 mph SSW
Thu 1	Drizzle	72 / 90 °F	0.14 in	14 mph SW
Wed 30	Drizzle	70 / 88 °F	0.14 in	10 mph NE
Tue 29	Drizzle	71 / 87 °F	0.05 in	16 mph NE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in Rio das OstrasQuestions

What's the weather like today in Rio das Ostras?

Heavy drizzle, from 69 °F to 81 °F, with a gentle breeze from the northeast (9 mph) and a 89% chance of rain.

Will it rain tomorrow in Rio das Ostras?

On Friday 30 the chance of rain is 100% (0.70 in): light rain.

How warm will it be this week?

Between a low of 69 °F and a high of 89 °F; the warmest day, Tuesday 3.

What's the UV index today?

It reaches 6 (high). Sunscreen, hat and shade between 12 and 4 pm.

Is the pressure rising or falling?

It's 30.04 inHg and steady: −0.16 inHg over the last 24 hours.

When is the best time to visit Rio das Ostras?

The best time to visit Rio das Ostras is from June to August: highs of 79 °F, about 6 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Rio das Ostras in October?

In October, Rio das Ostras normally sees highs of 82 °F and lows of 66 °F, with about 11 rainy days (3.28 in for the month) and 4 hours of sunshine a day. The sea is around 71 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Rio das Ostras?

The warmest is February, with average highs of 88 °F, and the coldest July, with lows of 60 °F. The wettest is December (7.25 in) and the driest, August.

More about Rio das Ostras today

Weather near Rio das Ostras

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 4.0 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 7:05 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from