Chatham water temp
This data the coastal Chatham 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 Chatham
Water temperature in Chatham today is 64.4°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Chatham was recorded in 2021 and was 65.8°F, and the coldest was recorded in 2013 at 59.7°F. Sea water temperature in Chatham is expected to drop to 60.8°F in the next 10 days. September average water temperature in Chatham is 64.8°F, the minimum temperature is 59.2°F, and the maximum is 71.2°F.
The swimming season in Chatham lasts from July to August. During those months, Chatham water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Chatham in winter reaches 42.6°F, in spring 44.4°F, in summer the average temperature rises to 64.6°F, and in autumn it is 58.3°F.
Chatham water temperature now
| September 25, 2025 |
|---|
| today temp |
| 64.4°F |
| September 24, 2025 |
|---|
| yesterday temp |
| 63.3°F |
The sea salinity in Chatham is 31.76‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Chatham 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 Chatham. 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 Chatham. 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' 4" | 2' 4" | 2' 3" | 2' 2" |
| 0.71 m | 0.7 m | 0.68 m | 0.66 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 2' 5" | 2' 7" | 2' 9" | 3' 1" |
| 0.73 m | 0.79 m | 0.85 m | 0.93 m |
Surf report in Chatham
Chatham weather forecast
Current temperature and weather
Data in a table show Chatham temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast Chatham.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  | | |
| 63.7°F | 63.9°F | 64.2°F | 66°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 67.6°F | 67.6°F | 68.2°F | 68.5°F |
You may also be interested in other sections of our site for Chatham: Sunrise and Sunset, Tides
Chatham water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Chatham. 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 Chatham 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 | 42.1°F | 37.9°F | 47.5°F | cold |
| Sea water temperature in Chatham in January | ||||
| February | 39.4°F | 34.2°F | 43.3°F | cold |
| Sea water temperature in Chatham in February | ||||
| March | 39.7°F | 35.2°F | 46.4°F | cold |
| Sea water temperature in Chatham in March | ||||
| April | 43.3°F | 37.6°F | 49.8°F | cold |
| Sea water temperature in Chatham in April | ||||
| May | 50.2°F | 44.1°F | 61°F | cold |
| Sea water temperature in Chatham in May | ||||
| June | 58.6°F | 50.9°F | 66.9°F | cold |
| Sea water temperature in Chatham in June | ||||
| July | 66.9°F | 59.9°F | 73.8°F | cold |
| Sea water temperature in Chatham in July | ||||
| August | 68.2°F | 63°F | 74.3°F | warm |
| Sea water temperature in Chatham in August | ||||
| September | 64.8°F | 59.2°F | 71.2°F | cold |
| Sea water temperature in Chatham in September | ||||
| October | 58.5°F | 52°F | 65.1°F | cold |
| Sea water temperature in Chatham in October | ||||
| November | 51.6°F | 45.9°F | 58.3°F | cold |
| Sea water temperature in Chatham in November | ||||
| December | 46.2°F | 41.7°F | 51.6°F | cold |
| Sea water temperature in Chatham in December | ||||
Chart monthly average water temperature in Chatham
