Grays Beach water temp
This data the coastal Grays 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 Grays Beach
Water temperature in Grays Beach today is 66.2°F. Based on our historical data over a period of ten years, the warmest water in this day in the Cape Cod Bay near Grays Beach was recorded in 2021 and was 69.8°F, and the coldest was recorded in 2013 at 62.2°F. Sea water temperature in Grays Beach is expected to drop to 62.1°F in the next 10 days. September average water temperature in Grays Beach is 66.6°F, the minimum temperature is 59.9°F, and the maximum is 73.8°F.
The swimming season in Grays Beach lasts from July to September. During those months, Grays Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Grays Beach in winter reaches 40.5°F, in spring 45.3°F, in summer the average temperature rises to 66.9°F, and in autumn it is 59.2°F.
Grays Beach water temperature now
| September 25, 2025 |
|---|
| today temp |
| 66.2°F |
| September 24, 2025 |
|---|
| yesterday temp |
| 64.9°F |
The sea salinity in Grays Beach is 31.11‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Grays 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 Grays 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 Grays Beach. 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 |
|---|---|---|---|
| 1' 9" | 1' 8" | 1' 7" | 1' 5" |
| 0.53 m | 0.51 m | 0.47 m | 0.43 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 6" | 1' 7" | 1' 8" | 1' 8" |
| 0.45 m | 0.48 m | 0.5 m | 0.52 m |
Surf report in Grays Beach
Grays Beach weather forecast
Current temperature and weather
Data in a table show Grays Beach temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast Grays Beach.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | | |
| 63.5°F | 63.9°F | 64.4°F | 66.7°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | | |
| 68.7°F | 69.3°F | 69.6°F | 69.6°F |
You may also be interested in other sections of our site for Grays Beach: Sunrise and Sunset, Tides
Grays Beach water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Grays 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 Grays 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 | 39.6°F | 32.4°F | 46.4°F | cold |
| Sea water temperature in Grays Beach in January | ||||
| February | 37°F | 30.6°F | 42.1°F | cold |
| Sea water temperature in Grays Beach in February | ||||
| March | 38.8°F | 31.3°F | 46.4°F | cold |
| Sea water temperature in Grays Beach in March | ||||
| April | 44.4°F | 36.1°F | 50.9°F | cold |
| Sea water temperature in Grays Beach in April | ||||
| May | 52.7°F | 45°F | 63°F | cold |
| Sea water temperature in Grays Beach in May | ||||
| June | 61.7°F | 52.5°F | 72.5°F | cold |
| Sea water temperature in Grays Beach in June | ||||
| July | 69.1°F | 61°F | 76.3°F | warm |
| Sea water temperature in Grays Beach in July | ||||
| August | 70°F | 64°F | 77.4°F | warm |
| Sea water temperature in Grays Beach in August | ||||
| September | 66.6°F | 59.9°F | 73.8°F | cold |
| Sea water temperature in Grays Beach in September | ||||
| October | 59.5°F | 52.5°F | 66.7°F | cold |
| Sea water temperature in Grays Beach in October | ||||
| November | 51.4°F | 45.1°F | 60.1°F | cold |
| Sea water temperature in Grays Beach in November | ||||
| December | 44.8°F | 38.5°F | 51.1°F | cold |
| Sea water temperature in Grays Beach in December | ||||
Chart monthly average water temperature in Grays Beach
