Sea TemperaturesSaint Helier Sea Temperature in September
Looking to find out what the average sea water temperature in Saint Helier is for September? Find out what the lowest, highest, and average water temperatures are for Saint Helier over the past 10 years.
Average water temperature in Saint Helier for September
The average, high, and low temperatures below should help you if you can swim in the water in Saint Helier in September.
Average
17.81° C
64.06° F
High
19.48° C
67.06° F
Low
16.25° C
61.25° F
Water temperature range by day in September in Saint Helier
The chart below shows the range of low and high temperatures by day for the month of September in Saint Helier.
Average daily water temperatures in Saint Helier for September
| Day | Average | Low | High |
|---|---|---|---|
| 1 | 18.03° C | 17.28° C | 18.75° C |
| 2 | 18.1° C | 17.23° C | 18.85° C |
| 3 | 18.14° C | 17.16° C | 18.9° C |
| 4 | 18.16° C | 17.44° C | 18.73° C |
| 5 | 18.15° C | 17.61° C | 18.82° C |
| 6 | 18.21° C | 17.51° C | 19.48° C |
| 7 | 18.19° C | 17.57° C | 19.16° C |
| 8 | 18.13° C | 17.38° C | 18.88° C |
| 9 | 18.11° C | 17.4° C | 19.21° C |
| 10 | 17.95° C | 17.51° C | 18.98° C |
| 11 | 18° C | 17.49° C | 19.09° C |
| 12 | 18° C | 17.39° C | 18.97° C |
| 13 | 17.95° C | 16.56° C | 18.9° C |
| 14 | 17.92° C | 16.29° C | 18.91° C |
| 15 | 17.9° C | 16.25° C | 18.89° C |
| 16 | 17.83° C | 16.35° C | 18.99° C |
| 17 | 17.77° C | 16.4° C | 19.05° C |
| 18 | 17.68° C | 16.54° C | 18.97° C |
| 19 | 17.69° C | 16.59° C | 18.63° C |
| 20 | 17.67° C | 16.46° C | 18.35° C |
| 21 | 17.65° C | 16.47° C | 18.38° C |
| 22 | 17.54° C | 16.6° C | 18.32° C |
| 23 | 17.47° C | 16.53° C | 18.26° C |
| 24 | 17.51° C | 16.69° C | 18.2° C |
| 25 | 17.47° C | 16.64° C | 18.07° C |
| 26 | 17.46° C | 16.66° C | 18.03° C |
| 27 | 17.41° C | 16.65° C | 18.11° C |
| 28 | 17.37° C | 16.38° C | 18.14° C |
| 29 | 17.32° C | 16.73° C | 18° C |
| 30 | 17.28° C | 16.78° C | 17.93° C |
Water temperature in September for locations near Saint Helier
Data source and citation
Raw data for the calculations made to find the sea surface temperature in Saint Helier 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.