Saint Simons Island water temp
This data the coastal Saint Simons Island ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Current ocean temperature in Saint Simons Island
Water temperature in Saint Simons Island today is 77.7°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Saint Simons Island was recorded in 2018 and was 84.9°F, and the coldest was recorded in 2024 at 77.5°F. Sea water temperature in Saint Simons Island is expected to rise to 80.4°F in the next 10 days. September average water temperature in Saint Simons Island is 82°F, the minimum temperature is 76.3°F, and the maximum is 86.4°F.
The swimming season in Saint Simons Island lasts from April to November. During those months, Saint Simons Island water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Saint Simons Island in winter reaches 59.7°F, in spring 68.5°F, in summer the average temperature rises to 82.8°F, and in autumn it is 75.2°F.
Saint Simons Island water temperature now
| September 17, 2025 |
|---|
| today temp |
| 77.7°F |
| September 16, 2025 |
|---|
| yesterday temp |
| 78.1°F |
The ocean salinity in Saint Simons Island is 34.28‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Saint Simons Island for today
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Saint Simons Island. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Saint Simons Island. Data in table shown for September 17, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 1' 8" | 1' 7" | 1' 6" | 1' 4" |
| 0.51 m | 0.49 m | 0.45 m | 0.41 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 3" | 1' 2" | 1' 1" | 1' 3" |
| 0.38 m | 0.35 m | 0.34 m | 0.39 m |
Surf report in Saint Simons Island
Saint Simons Island weather forecast
Current temperature and weather
Data in a table show Saint Simons Island temperature today (September 17, 2025). For more information and forecast for a few days, go to the weather forecast Saint Simons Island.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 76.3°F | 74.7°F | 72.3°F | 74.3°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | |  |
| 84.4°F | 84.7°F | 80.6°F | 77.7°F |
You may also be interested in other sections of our site for Saint Simons Island: Sunrise and Sunset, Tides
Saint Simons Island water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Saint Simons Island. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Saint Simons Island on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Chart monthly average water temperature in Saint Simons Island
