Measurements:
°C
°F
CURRENT WEATHER
17:17
Rio Grande
58°F
NW 9 mph
Feels like: 56°F
Precip: 9%
World Resorts Brazil Rio Grande Weather

7 Day Weather Forecast

09.08
tue
DAY
58°F
E 1 mph
precip
9%
NIGHT
56°F
NE 4 mph
precip
20%
09.09
wed
DAY
58°F
NW 9 mph
precip
20%
NIGHT
58°F
W 8 mph
precip
17%
09.10
thu
DAY
62°F
NW 10 mph
precip
26%
NIGHT
62°F
W 12 mph
precip
46%
09.11
fri
DAY
62°F
W 21 mph
precip
89%
NIGHT
54°F
N 45 mph
precip
84%
09.12
sat
DAY
58°F
N 24 mph
precip
7%
NIGHT
52°F
NE 17 mph
precip
13%
09.13
sun
DAY
56°F
NW 19 mph
precip
16%
NIGHT
54°F
W 14 mph
precip
16%
09.14
mon
DAY
60°F
W 16 mph
precip
17%
NIGHT
56°F
SW 14 mph
precip
71%

Rio Grande Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Rio Grande was 17.1°F. The maximum and minimum values were 15.1°F and 19.5°F respectively.

Rio Grande on the Weather Map

Best Time to Visit Rio Grande
The most sunny months:
July 14 days
May 12 days
August 11 days
The most warm months:
February 81.7 °F
January 81.2 °F
March 80.0 °F
Warmest sea temperature:
February 82.2 °F
January 81.3 °F
March 80.3 °F
The most cold months:
July 59.1 °F
June 60.6 °F
August 60.9 °F
The most rainy months:
September 6 days
July 4 days
May 3 days
The most windy months:
November 12 mph
December 12 mph
October 12 mph
more details