Sea TemperaturesSaint Louis Sea Temperature
Looking to find out what the sea water temperature in Saint Louis is for today and the next few days? Below are data and charts that will give you information about sea temperatures in Saint Louis and nearby locations.
Water temperature in Saint Louis right now
Below is the current sea temperature for Saint Louis, Senegal on January 15, 2026.
Today
20.71° C
69.27° F
Yesterday
20.79° C
69.43° F
A week ago
20.99° C
69.78° F
Water at this temperature is very pleasant to swim in and if you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.
The average sea temperature for Saint Louis on January 15 over the last 10 years is 20.71° C (69.27° F), with a low temperature of 18.39° C (65.1° F) and a high of 23.16° C (73.69° F).
Analysis and forecast for Saint Louis water temperatures
The water temperature in Saint Louis today is the same as the average temperature of 20.71° C (69.27° F) and the temperature on this day last year was 20.71° C (69.27° F).
The chart and table below shows the change in water temperature in Saint Louis over the last 30 days:
| Date | Temperature (Celsius) | Temperature (Fahrenheit) |
|---|---|---|
| January 15 | 20.71° C | 69.27° F |
| January 14 | 20.79° C | 69.43° F |
| January 13 | 20.81° C | 69.45° F |
| January 12 | 20.69° C | 69.25° F |
| January 11 | 20.78° C | 69.4° F |
| January 10 | 20.88° C | 69.58° F |
| January 9 | 20.98° C | 69.76° F |
| January 8 | 20.99° C | 69.78° F |
| January 7 | 20.86° C | 69.54° F |
| January 6 | 20.85° C | 69.53° F |
| January 5 | 20.77° C | 69.39° F |
| January 4 | 20.81° C | 69.46° F |
| January 3 | 20.89° C | 69.6° F |
| January 2 | 21.08° C | 69.94° F |
| January 1 | 21.11° C | 69.99° F |
| December 31 | 21.1° C | 69.98° F |
| December 30 | 21.19° C | 70.14° F |
| December 29 | 21.07° C | 69.92° F |
| December 28 | 21.05° C | 69.88° F |
| December 27 | 21.21° C | 70.19° F |
| December 26 | 21.24° C | 70.24° F |
| December 25 | 21.21° C | 70.17° F |
| December 24 | 21.1° C | 69.97° F |
| December 23 | 21.26° C | 70.26° F |
| December 22 | 21.46° C | 70.63° F |
| December 21 | 21.39° C | 70.51° F |
| December 20 | 21.55° C | 70.79° F |
| December 19 | 21.61° C | 70.9° F |
| December 18 | 21.85° C | 71.33° F |
| December 17 | 21.95° C | 71.52° F |
The actual nearshore temperatures may vary by several degrees and this can also be heavily affected by weather. Strong winds can cause cold, deep waters to replace the surface waters that had been warmed by the sun, and heavy rain can also reduce the temperature of the sea surface temperature as well.
Water temperature in Saint Louis by month
The chart below shows the monthly average water temperature in Saint Louis.
For more detailed information on how the sea temperature in Saint Louis changes for each month of the year, choose from the months below.
Saint Louis map and nearby water temperatures
Why measure sea surface temperatures (SST) in Saint Louis?
The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as Saint Louis because they want to understand and learn how the ocean communicates with the atmosphere of Earth.
SST is one measure that provides information on the global climate, and it can be used to predict the weather in Saint Louis as well as atmospheric model simulations and to study marine ecosystems in the area.
Data source and citation
Raw data for the calculations made to find the sea surface temperature in Saint Louis comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.
The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.
If you'd like to use any of the information above in the format it is presented, please use the citation tool below.