Dover (DE) water temp
This data the coastal Dover 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 Dover
Water temperature in Dover today is 73.8°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Dover was recorded in 2018 and was 80.4°F, and the coldest was recorded in 2017 at 72.7°F. Sea water temperature in Dover is expected to rise to 74.1°F in the next 10 days. September average water temperature in Dover is 73.8°F, the minimum temperature is 66.9°F, and the maximum is 82°F.
The swimming season in Dover lasts from June to September. During those months, Dover water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Dover in winter reaches 40.5°F, in spring 52.3°F, in summer the average temperature rises to 76.5°F, and in autumn it is 63.9°F.
Dover water temperature now
| September 5, 2025 |
|---|
| today temp |
| 73.8°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 73°F |
The ocean salinity in Dover is 27.38‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Dover 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 Dover. 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 Dover. Data in table shown for September 5, 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' 0" | 1' 8" | 1' 5" | 1' 1" |
| 0.61 m | 0.51 m | 0.42 m | 0.34 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 11" | 0' 10" | 1' 3" | 1' 6" |
| 0.27 m | 0.26 m | 0.39 m | 0.46 m |
Surf report in Dover
Dover weather forecast
Current temperature and weather
Data in a table show Dover temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Dover.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  |  |  |
| 69.4°F | 67.8°F | 66°F | 71.8°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 83.8°F | 87.3°F | 83.1°F | 76.6°F |
You may also be interested in other sections of our site for Dover: Sunrise and Sunset, Tides
Dover water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Dover. 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 Dover 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°F | 30.7°F | 49.5°F | cold |
| Ocean water temperature in Dover in January | ||||
| February | 38.1°F | 30.6°F | 50.2°F | cold |
| Ocean water temperature in Dover in February | ||||
| March | 43.2°F | 30.9°F | 53.4°F | cold |
| Ocean water temperature in Dover in March | ||||
| April | 52°F | 42.1°F | 61.9°F | cold |
| Ocean water temperature in Dover in April | ||||
| May | 61.9°F | 52.5°F | 72.7°F | cold |
| Ocean water temperature in Dover in May | ||||
| June | 72.1°F | 64°F | 81.3°F | warm |
| Ocean water temperature in Dover in June | ||||
| July | 78.8°F | 73.6°F | 84.7°F | hot |
| Ocean water temperature in Dover in July | ||||
| August | 78.3°F | 72.3°F | 85.3°F | hot |
| Ocean water temperature in Dover in August | ||||
| September | 73.8°F | 66.9°F | 82°F | warm |
| Ocean water temperature in Dover in September | ||||
| October | 64.8°F | 54.7°F | 74.5°F | cold |
| Ocean water temperature in Dover in October | ||||
| November | 53.2°F | 44.4°F | 63°F | cold |
| Ocean water temperature in Dover in November | ||||
| December | 44.2°F | 35.8°F | 52.3°F | cold |
| Ocean water temperature in Dover in December | ||||
Chart monthly average water temperature in Dover
