Great River water temp
This data the coastal Great River sea 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 sea temperature in Great River
Water temperature in Great River today is 68.5°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Great River was recorded in 2021 and was 77°F, and the coldest was recorded in 2023 at 63.9°F. Sea water temperature in Great River is expected to drop to 66.7°F in the next 10 days. September average water temperature in Great River is 70.7°F, the minimum temperature is 61.9°F, and the maximum is 80.4°F.
The swimming season in Great River lasts from June to September. During those months, Great River water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Great River in winter reaches 42.8°F, in spring 47.3°F, in summer the average temperature rises to 71.1°F, and in autumn it is 63.3°F.
Great River water temperature now
| September 26, 2025 |
|---|
| today temp |
| 68.5°F |
| September 25, 2025 |
|---|
| yesterday temp |
| 69.3°F |
The sea salinity in Great River is 29.78‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Great River 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 Great River. 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 Great River. Data in table shown for September 26, 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 |
|---|---|---|---|
| 3' 2" | 3' 4" | 3' 3" | 2' 11" |
| 0.96 m | 1.02 m | 1 m | 0.89 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 2' 7" | 2' 6" | 2' 4" | 2' 3" |
| 0.8 m | 0.76 m | 0.72 m | 0.69 m |
Surf report in Great River
Great River weather forecast
Current temperature and weather
Data in a table show Great River temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Great River.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 71.4°F | 68.4°F | 66°F | 69.8°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | |  |
| 77°F | 80.6°F | 79.2°F | 74.7°F |
You may also be interested in other sections of our site for Great River: Sunrise and Sunset, Tides
Great River water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Great River. 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 Great River 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
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 41.7°F | 29.8°F | 49.8°F | cold |
| Sea water temperature in Great River in January | ||||
| February | 39°F | 32.7°F | 44.4°F | cold |
| Sea water temperature in Great River in February | ||||
| March | 40.8°F | 32.4°F | 50.2°F | cold |
| Sea water temperature in Great River in March | ||||
| April | 46.4°F | 37.6°F | 56.5°F | cold |
| Sea water temperature in Great River in April | ||||
| May | 54.9°F | 46.2°F | 67.5°F | cold |
| Sea water temperature in Great River in May | ||||
| June | 64.9°F | 54.5°F | 78.3°F | cold |
| Sea water temperature in Great River in June | ||||
| July | 73.9°F | 65.7°F | 83.7°F | warm |
| Sea water temperature in Great River in July | ||||
| August | 74.5°F | 67.6°F | 82.8°F | warm |
| Sea water temperature in Great River in August | ||||
| September | 70.7°F | 61.9°F | 80.4°F | warm |
| Sea water temperature in Great River in September | ||||
| October | 63.9°F | 56.1°F | 77.9°F | cold |
| Sea water temperature in Great River in October | ||||
| November | 55.2°F | 41.5°F | 62.6°F | cold |
| Sea water temperature in Great River in November | ||||
| December | 47.7°F | 39.9°F | 53.8°F | cold |
| Sea water temperature in Great River in December | ||||
Chart monthly average water temperature in Great River
