All data are in degrees Fahrenheit

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Water temperature in Saint-Louis

Detailed information about the current water temperature in Saint-Louis. 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 Saint-Louis now

63.5

°F

February 1, 03:25

Trend:

decreasing

Yesterday:

63.9°F

Tomorrow:

63.3°F

Sunrise:

07:36

Sunset:

19:03

Day Length:

11 h. 27 min.

Saint-Louis in February

Minimum:

64.9°F

Average:

68.1°F

Maximum:

71.6°F

Sea water temperature in Saint-Louis today

As of now, in Saint-Louis, the water temperature is 63.5°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 2.0°F lower 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 fall a bit.

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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 69.3°F on 2016, while the historical minimum was 61.4°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 shows a gradual cooling trend. The average temperature is expected to be 62.9°F, the minimum temperature may reach 62.7°F, and the maximum might stay at 63.3°F.

Daily water temperature in Saint-Louis

Date Current Year

actual* / forecast**

last year 10 years average
Jan 18 64.3°F 63.0°F 66.5°F
Jan 19 64.4°F 63.0°F 66.4°F
Jan 20 64.5°F 64.4°F 66.3°F
Jan 21 64.6°F 64.9°F 66.4°F
Jan 22 65.0°F 64.2°F 66.2°F
Jan 23 64.0°F 65.0°F 66.3°F
Jan 24 64.1°F 64.6°F 66.1°F
Jan 25 63.9°F 65.4°F 66.2°F
Jan 26 63.8°F 64.8°F 65.9°F
Jan 27 63.7°F 64.7°F 65.9°F
Jan 28 62.4°F 64.9°F 65.7°F
Jan 29 63.6°F 64.3°F 65.7°F
Jan 30 64.1°F 65.7°F 65.7°F
Jan 31 63.9°F 66.2°F 65.9°F
Feb 1 63.5°F 65.3°F 65.6°F
Feb 2 63.3°F 63.3°F 65.3°F
Feb 3 62.8°F 62.2°F 64.8°F
Feb 4 62.8°F 61.9°F 64.8°F
Feb 5 63.2°F 63.0°F 65.2°F
Feb 6 63.1°F 63.6°F 65.1°F
Feb 7 62.9°F 64.1°F 64.9°F
Feb 8 62.7°F 64.4°F 64.7°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 Saint-Louis by month

In Saint-Louis, the months June through November offer comfortable swimming conditions, which amounts to 171 swimming days.
The warmest water in Saint-Louis was recorded on September 18, 2025, reaching a 86.3°F. While the coldest temperature occurred on February 10, 2018, dipping to 59.6°F. The average readings by season are 67.1°F in Winter, 66.4°F in Spring, 79.0°F in Summer, and 80.5°F in Autumn.