Rio de Janeiro, Brazil
Coastal Waters22.94°S, 42.49°WStation BR-RIO-PRA

Prainha Sea Water Temperature

A subtropical beach on the Coastal Waters, warmest around March at about 25.4°C. Today's reading, 7-day forecast, and monthly averages below.

Live readings · auto-updating
Water Temperature NowBuoy & Sentinel-3 SST

Prainha water temperature

21.7
71.1°FComfortable (20°C – 24°C)

Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.

+0°vs Sep avgCoastal Waters22.94°S, 42.49°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
23°C
73.8°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
21.7°C
71.1°F
Waves: 1m
Comfortable
ThuOct 1
22°C
71.6°F
Waves: 0.9m
Comfortable
FriOct 2
22.1°C
71.8°F
Waves: 0.7m
Comfortable
SatOct 3
22°C
71.6°F
Waves: 0.6m
Comfortable
SunOct 4
21.7°C
71.1°F
Waves: 0.7m
Comfortable
MonOct 5
21.4°C
70.5°F
Waves: 0.9m
Comfortable
TueOct 6
21.3°C
70.3°F
Waves: 1m
Comfortable
Forecast cooling trend: -0.4°C over 7 days at Prainha.
Confidence: High

Prainha Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Prainha occurs inJanuary, February, March, April, December — peaking at25.4°C (77.7°F) in March.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
25
Jan
25
Feb
25
Mar
25
Apr
24
May
23
Jun
22
Jul
22
Aug
Current
22
Sep
22
Oct
23
Nov
24
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January22°C24.9°C27.1°CWarm & Ideal (24°C – 28°C)
February21.6°C24.9°C27.4°CWarm & Ideal (24°C – 28°C)
March21°C25.4°C27.3°CWarm & Ideal (24°C – 28°C)
April23.8°C25.1°C26.7°CWarm & Ideal (24°C – 28°C)
May21.2°C23.8°C25.6°CComfortable (20°C – 24°C)
June21.9°C23.2°C24.6°CComfortable (20°C – 24°C)
July20.5°C22.3°C23.1°CComfortable (20°C – 24°C)
August20.5°C21.7°C23.3°CComfortable (20°C – 24°C)
SeptemberCurrent19.1°C21.7°C23.2°CComfortable (20°C – 24°C)
October20.8°C22.3°C24.4°CComfortable (20°C – 24°C)
November21.8°C23.2°C25.2°CComfortable (20°C – 24°C)
December22.6°C24.4°C26°CWarm & Ideal (24°C – 28°C)

Swimming FAQs for Prainha

Is the sea warm enough to swim in Prainha today?

Typical sea surface temperature in Prainha this time of year is 21.7°C (71.1°F) — classified as Comfortable (20°C – 24°C). Pleasant and revitalizing. Great for most beachgoers and active recreational swimming. Live readings load automatically.

What are the warmest months for swimming in Prainha?

The highest water temperatures in Prainha typically occur duringJanuary, February, March, April, December, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Prainha in September?

Historically in September, water temperatures in Prainha average around21.7°C (71.1°F), fluctuating between a recorded minimum of 19.1°C and a maximum of 23.2°C.

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Prainha Coastal Zone Map

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