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

68.3

°F

February 25, 00:50

Trend:

stable

Yesterday:

68.1°F

Tomorrow:

68.0°F

Sunrise:

07:26

Sunset:

19:12

Day Length:

11 h. 46 min.

Saint-Louis in March

Minimum:

64.5°F

Average:

67.9°F

Maximum:

71.4°F

Sea water temperature in Saint-Louis today

As of now, in Saint-Louis, the water temperature is 68.3°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 3.6°F higher 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 fall 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 maximum temperature for this date. The maximum temperature recorded for this date was 67.4°F on 2020, while the historical minimum was 62.7°F on 2017.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 66.8°F, the minimum temperature may reach 65.9°F, and the maximum might stay at 68.0°F.

Daily water temperature in Saint-Louis

Date Current Year

actual* / forecast**

last year 10 years average
Feb 11 65.2°F 64.1°F 64.9°F
Feb 12 65.2°F 64.8°F 65.1°F
Feb 13 65.4°F 64.4°F 65.4°F
Feb 14 66.0°F 64.8°F 65.7°F
Feb 15 65.5°F 64.8°F 65.1°F
Feb 16 64.7°F 65.1°F 64.9°F
Feb 17 64.5°F 63.7°F 64.4°F
Feb 18 64.2°F 64.0°F 64.8°F
Feb 19 65.2°F 64.0°F 64.9°F
Feb 20 63.8°F 63.8°F 64.8°F
Feb 21 64.7°F 62.6°F 64.6°F
Feb 22 65.9°F 63.6°F 64.8°F
Feb 23 66.1°F 63.3°F 64.4°F
Feb 24 68.1°F 63.9°F 64.5°F
Feb 25 68.3°F 64.1°F 64.7°F
Feb 26 68.0°F 63.9°F 64.5°F
Feb 27 67.9°F 63.4°F 64.3°F
Feb 28 67.8°F 63.5°F 64.2°F
Mar 1 65.9°F 64.1°F 63.9°F
Mar 2 66.0°F 63.9°F 64.0°F
Mar 3 66.2°F 64.0°F 64.2°F
Mar 4 66.2°F 63.9°F 64.3°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.