Eastham water temp
This data the coastal Eastham 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 Eastham
Water temperature in Eastham today is 64.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Eastham was recorded in 2021 and was 65.3°F, and the coldest was recorded in 2013 at 59.2°F. Sea water temperature in Eastham is expected to drop to 60.6°F in the next 10 days. September average water temperature in Eastham is 64.2°F, the minimum temperature is 58.8°F, and the maximum is 70.7°F.
The swimming season in Eastham lasts from July to August. During those months, Eastham water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Eastham in winter reaches 43.2°F, in spring 44.2°F, in summer the average temperature rises to 64°F, and in autumn it is 58.1°F.
Eastham water temperature now
| September 25, 2025 |
|---|
| today temp |
| 64.6°F |
| September 24, 2025 |
|---|
| yesterday temp |
| 63°F |
The sea salinity in Eastham is 31.63‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Eastham 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 Eastham. 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 Eastham. Data in table shown for September 25, 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' 9" | 2' 9" | 2' 7" | 2' 6" |
| 0.85 m | 0.83 m | 0.79 m | 0.76 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 2' 8" | 2' 11" | 3' 1" | 3' 4" |
| 0.82 m | 0.89 m | 0.94 m | 1.02 m |
Surf report in Eastham
Eastham weather forecast
Current temperature and weather
Data in a table show Eastham temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast Eastham.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  | | |
| 63.9°F | 63.9°F | 64.2°F | 65.8°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 67.1°F | 67.1°F | 67.8°F | 68.4°F |
You may also be interested in other sections of our site for Eastham: Sunrise and Sunset, Tides
Eastham water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Eastham. 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 Eastham 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 | 42.8°F | 38.7°F | 47.7°F | cold |
| Sea water temperature in Eastham in January | ||||
| February | 40.1°F | 36°F | 43.9°F | cold |
| Sea water temperature in Eastham in February | ||||
| March | 39.9°F | 36.7°F | 46.4°F | cold |
| Sea water temperature in Eastham in March | ||||
| April | 43°F | 38.1°F | 49.6°F | cold |
| Sea water temperature in Eastham in April | ||||
| May | 49.8°F | 43.7°F | 61°F | cold |
| Sea water temperature in Eastham in May | ||||
| June | 58.3°F | 49.8°F | 66.9°F | cold |
| Sea water temperature in Eastham in June | ||||
| July | 66.4°F | 59.9°F | 72.5°F | cold |
| Sea water temperature in Eastham in July | ||||
| August | 67.6°F | 62.8°F | 73°F | cold |
| Sea water temperature in Eastham in August | ||||
| September | 64.2°F | 58.8°F | 70.7°F | cold |
| Sea water temperature in Eastham in September | ||||
| October | 58.3°F | 51.8°F | 64.9°F | cold |
| Sea water temperature in Eastham in October | ||||
| November | 51.6°F | 46.6°F | 57.4°F | cold |
| Sea water temperature in Eastham in November | ||||
| December | 46.8°F | 42.6°F | 52.2°F | cold |
| Sea water temperature in Eastham in December | ||||
Chart monthly average water temperature in Eastham
