What is the current water temperature in Porto Alegre?

As of now, in Porto Alegre, the water temperature is 26.11°C. It's safe to say that the water is comfortably warm for various water-related activities.

Brazil > Porto Alegre

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.

79.0

°F

December 21, 17:22

Trend:

stable

Yesterday:

79.7°F

Tomorrow:

79.0°F

Sunrise:

06:20

Sunset:

20:25

Day Length:

14 h. 5 min.

Porto Alegre in December

Minimum:

78.0°F

Average:

79.5°F

Maximum:

82.3°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 79.0°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.4°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 79.3°F on 2018, while the historical minimum was 75.5°F on 2017.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 79.1°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Porto Alegre

Date	Current Year actual* / forecast**	last year	10 years average
Dec 7	78.3°F	77.6°F	75.5°F
Dec 8	79.6°F	77.4°F	75.6°F
Dec 9	79.4°F	77.2°F	75.8°F
Dec 10	79.1°F	77.1°F	75.8°F
Dec 11	78.9°F	76.1°F	76.3°F
Dec 12	78.7°F	75.1°F	76.8°F
Dec 13	78.4°F	75.4°F	77.3°F
Dec 14	79.9°F	76.0°F	77.3°F
Dec 15	80.0°F	76.5°F	77.3°F
Dec 16	80.9°F	74.8°F	77.3°F
Dec 17	79.3°F	75.0°F	77.4°F
Dec 18	78.0°F	74.8°F	77.6°F
Dec 19	78.7°F	75.8°F	77.5°F
Dec 20	79.7°F	76.0°F	77.7°F
Dec 21	79.0°F	78.0°F	77.6°F
Dec 22	79.0°F	78.0°F	77.6°F
Dec 23	79.0°F	77.0°F	77.6°F
Dec 24	79.1°F	76.7°F	77.7°F
Dec 25	79.2°F	76.6°F	77.8°F
Dec 26	79.2°F	77.1°F	77.8°F
Dec 27	79.1°F	77.4°F	77.7°F
Dec 28	79.2°F	77.8°F	77.8°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 68.8°F in Autumn.