Atlantic Beach (Long Island) water temp
This data the coastal Atlantic Beach 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 Atlantic Beach
Water temperature in Atlantic Beach today is 70.7°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Atlantic Beach was recorded in 2015 and was 72.9°F, and the coldest was recorded in 2009 at 68.2°F. Sea water temperature in Atlantic Beach is expected to drop to 68.9°F in the next 10 days. September average water temperature in Atlantic Beach is 70.9°F, the minimum temperature is 65.1°F, and the maximum is 77.2°F.
The swimming season in Atlantic Beach lasts from July to September. During those months, Atlantic Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Atlantic Beach in winter reaches 44.1°F, in spring 47.8°F, in summer the average temperature rises to 70.9°F, and in autumn it is 63.5°F.
Atlantic Beach water temperature now
| September 16, 2025 |
|---|
| today temp |
| 70.7°F |
| September 15, 2025 |
|---|
| yesterday temp |
| 70.9°F |
The sea salinity in Atlantic Beach is 29.58‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Atlantic Beach 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 Atlantic Beach. 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 Atlantic Beach. Data in table shown for September 16, 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 |
|---|---|---|---|
| 2' 6" | 2' 9" | 3' 1" | 3' 4" |
| 0.77 m | 0.84 m | 0.93 m | 1.01 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 3' 6" | 4' 1" | 4' 5" | 4' 0" |
| 1.07 m | 1.25 m | 1.35 m | 1.23 m |
Surf report in Atlantic Beach
Atlantic Beach weather forecast
Current temperature and weather
Data in a table show Atlantic Beach temperature today (September 16, 2025). For more information and forecast for a few days, go to the weather forecast Atlantic Beach.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  | |
| 66°F | 65.5°F | 64°F | 63.9°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| |  | |
| 67.8°F | 70.2°F | 68.9°F | 65.8°F |
You may also be interested in other sections of our site for Atlantic Beach: Sunrise and Sunset, Tides
Atlantic Beach water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Atlantic Beach. 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 Atlantic Beach 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 | 43.3°F | 37.2°F | 50.4°F | cold |
| Sea water temperature in Atlantic Beach in January | ||||
| February | 40.1°F | 34.9°F | 45.1°F | cold |
| Sea water temperature in Atlantic Beach in February | ||||
| March | 41.5°F | 36.1°F | 50.9°F | cold |
| Sea water temperature in Atlantic Beach in March | ||||
| April | 46.6°F | 39.2°F | 53.8°F | cold |
| Sea water temperature in Atlantic Beach in April | ||||
| May | 55.2°F | 47.5°F | 66.6°F | cold |
| Sea water temperature in Atlantic Beach in May | ||||
| June | 65.3°F | 56.8°F | 73.6°F | cold |
| Sea water temperature in Atlantic Beach in June | ||||
| July | 73.2°F | 65.1°F | 78.8°F | warm |
| Sea water temperature in Atlantic Beach in July | ||||
| August | 73.9°F | 68.7°F | 78.4°F | warm |
| Sea water temperature in Atlantic Beach in August | ||||
| September | 70.9°F | 65.1°F | 77.2°F | warm |
| Sea water temperature in Atlantic Beach in September | ||||
| October | 63.9°F | 57°F | 71.1°F | cold |
| Sea water temperature in Atlantic Beach in October | ||||
| November | 55.9°F | 49.3°F | 62.8°F | cold |
| Sea water temperature in Atlantic Beach in November | ||||
| December | 48.7°F | 40.8°F | 56.1°F | cold |
| Sea water temperature in Atlantic Beach in December | ||||
Chart monthly average water temperature in Atlantic Beach
