Chilmark water temp
This data the coastal Chilmark 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 Chilmark
Water temperature in Chilmark today is 66.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Chilmark was recorded in 2021 and was 68.4°F, and the coldest was recorded in 2024 at 62.1°F. Sea water temperature in Chilmark is expected to drop to 63.9°F in the next 10 days. September average water temperature in Chilmark is 66.7°F, the minimum temperature is 61.9°F, and the maximum is 71.8°F.
The swimming season in Chilmark lasts from July to September. During those months, Chilmark water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Chilmark in winter reaches 42.6°F, in spring 45.5°F, in summer the average temperature rises to 66.2°F, and in autumn it is 61.2°F.
Chilmark water temperature now
| September 25, 2025 |
|---|
| today temp |
| 66.6°F |
| September 24, 2025 |
|---|
| yesterday temp |
| 66.4°F |
The ocean salinity in Chilmark is 30.79‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Chilmark 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 Chilmark. 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 Chilmark. 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' 1" | 2' 0" | 1' 11" | 2' 0" |
| 0.64 m | 0.6 m | 0.59 m | 0.61 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 2' 2" | 2' 6" | 2' 11" | 3' 5" |
| 0.67 m | 0.77 m | 0.88 m | 1.05 m |
Surf report in Chilmark
Chilmark weather forecast
Current temperature and weather
Data in a table show Chilmark temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast Chilmark.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | | |
| 64.6°F | 64.6°F | 65.1°F | 67.6°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | | |
| 68.9°F | 70°F | 70.5°F | 70.2°F |
You may also be interested in other sections of our site for Chilmark: Sunrise and Sunset, Tides
Chilmark water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Chilmark. 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 Chilmark 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 | 36°F | 48.2°F | cold |
| Ocean water temperature in Chilmark in January | ||||
| February | 38.3°F | 31.6°F | 44.8°F | cold |
| Ocean water temperature in Chilmark in February | ||||
| March | 39.4°F | 32.2°F | 48°F | cold |
| Ocean water temperature in Chilmark in March | ||||
| April | 44.6°F | 35.6°F | 51.3°F | cold |
| Ocean water temperature in Chilmark in April | ||||
| May | 52.5°F | 45.7°F | 63.5°F | cold |
| Ocean water temperature in Chilmark in May | ||||
| June | 60.8°F | 54°F | 70.2°F | cold |
| Ocean water temperature in Chilmark in June | ||||
| July | 68.4°F | 61.9°F | 74.3°F | warm |
| Ocean water temperature in Chilmark in July | ||||
| August | 69.6°F | 65.3°F | 74.7°F | warm |
| Ocean water temperature in Chilmark in August | ||||
| September | 66.7°F | 61.9°F | 71.8°F | cold |
| Ocean water temperature in Chilmark in September | ||||
| October | 61.7°F | 55.2°F | 67.1°F | cold |
| Ocean water temperature in Chilmark in October | ||||
| November | 55°F | 48.4°F | 61.2°F | cold |
| Ocean water temperature in Chilmark in November | ||||
| December | 47.8°F | 41°F | 53.8°F | cold |
| Ocean water temperature in Chilmark in December | ||||
Chart monthly average water temperature in Chilmark
