Amagansett water temp
This data the coastal Amagansett 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 Amagansett
Water temperature in Amagansett today is 69.1°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Amagansett was recorded in 2018 and was 73.8°F, and the coldest was recorded in 2017 at 66.9°F. Sea water temperature in Amagansett is expected to drop to 68.9°F in the next 10 days. September average water temperature in Amagansett is 68.5°F, the minimum temperature is 63.5°F, and the maximum is 73.9°F.
The swimming season in Amagansett lasts from July to September. During those months, Amagansett water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Amagansett in winter reaches 44.8°F, in spring 45.9°F, in summer the average temperature rises to 67.6°F, and in autumn it is 62.8°F.
Amagansett water temperature now
| September 5, 2025 |
|---|
| today temp |
| 69.1°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 68.4°F |
The ocean salinity in Amagansett is 29.55‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Amagansett 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 Amagansett. 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 Amagansett. Data in table shown for September 6, 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' 0" | 3' 2" | 3' 3" | 3' 4" |
| 0.91 m | 0.96 m | 0.99 m | 1.02 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 3' 7" | 3' 11" | 4' 2" | 4' 6" |
| 1.1 m | 1.19 m | 1.28 m | 1.37 m |
Surf report in Amagansett
Amagansett weather forecast
Current temperature and weather
Data in a table show Amagansett temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Amagansett.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  | | |
| 66.9°F | 68.4°F | 69.1°F | 70.2°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 |  | | |
| 72.3°F | 72.7°F | 70.9°F | 70.3°F |
You may also be interested in other sections of our site for Amagansett: Sunrise and Sunset, Tides
Amagansett water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Amagansett. 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 Amagansett 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 | 44.1°F | 38.7°F | 50.5°F | cold |
| Ocean water temperature in Amagansett in January | ||||
| February | 40.8°F | 35.1°F | 46°F | cold |
| Ocean water temperature in Amagansett in February | ||||
| March | 40.8°F | 35.1°F | 50.4°F | cold |
| Ocean water temperature in Amagansett in March | ||||
| April | 44.8°F | 37.4°F | 52.5°F | cold |
| Ocean water temperature in Amagansett in April | ||||
| May | 52°F | 44.1°F | 63.7°F | cold |
| Ocean water temperature in Amagansett in May | ||||
| June | 61.5°F | 53.1°F | 70.9°F | cold |
| Ocean water temperature in Amagansett in June | ||||
| July | 70°F | 62.6°F | 74.7°F | warm |
| Ocean water temperature in Amagansett in July | ||||
| August | 71.4°F | 67.1°F | 75.7°F | warm |
| Ocean water temperature in Amagansett in August | ||||
| September | 68.5°F | 63.5°F | 73.9°F | warm |
| Ocean water temperature in Amagansett in September | ||||
| October | 63°F | 56.1°F | 68.4°F | cold |
| Ocean water temperature in Amagansett in October | ||||
| November | 56.7°F | 50.5°F | 62.8°F | cold |
| Ocean water temperature in Amagansett in November | ||||
| December | 49.6°F | 42.8°F | 55.4°F | cold |
| Ocean water temperature in Amagansett in December | ||||
Chart monthly average water temperature in Amagansett
