All data are in degrees Fahrenheit

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Water temperature in Porto Alegre

Detailed information about the current water temperature in Porto Alegre. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Porto Alegre now

60.9

°F

August 29, 16:20

Trend:

increasing

Yesterday:

60.6°F

Tomorrow:

61.3°F

Sunrise:

06:44

Sunset:

18:08

Day Length:

11 h. 24 min.

Porto Alegre in September

Minimum:

76.8°F

Average:

78.9°F

Maximum:

81.1°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 60.9°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.1°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 66.0°F on 2017, while the historical minimum was 59.9°F on 2018.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 61.4°F, with minimum temperature starting at 61.2°F, while the maximum might reach 61.6°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Aug 15 59.2°F 60.9°F 60.8°F
Aug 16 60.1°F 58.9°F 60.8°F
Aug 17 60.0°F 59.2°F 61.1°F
Aug 18 59.8°F 59.0°F 61.1°F
Aug 19 59.8°F 60.9°F 61.2°F
Aug 20 59.7°F 60.8°F 61.2°F
Aug 21 59.6°F 60.4°F 60.8°F
Aug 22 60.0°F 61.0°F 60.9°F
Aug 23 59.8°F 60.7°F 60.9°F
Aug 24 59.6°F 60.4°F 60.9°F
Aug 25 60.2°F 60.8°F 61.6°F
Aug 26 60.6°F 60.5°F 62.0°F
Aug 27 60.8°F 60.7°F 62.0°F
Aug 28 60.6°F 60.0°F 62.3°F
Aug 29 60.9°F 60.1°F 62.9°F
Aug 30 61.3°F 60.5°F 63.3°F
Aug 31 61.5°F 60.7°F 63.6°F
Sep 1 61.6°F 61.1°F 63.6°F
Sep 2 61.4°F 61.8°F 63.5°F
Sep 3 61.2°F 60.3°F 63.2°F
Sep 4 61.4°F 61.6°F 63.4°F
Sep 5 61.4°F 61.6°F 63.4°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Porto Alegre by month

In Porto Alegre, the months December through April offer comfortable swimming conditions, which amounts to 151 swimming days.
The warmest water in Porto Alegre was recorded on March 5, 2025, reaching a 86.6°F. While the coldest temperature occurred on July 5, 2025, dipping to 54.7°F. The average readings by season are 79.1°F in Winter, 73.3°F in Spring, 60.9°F in Summer, and 68.7°F in Autumn.