Winthrop water temp
This data the coastal Winthrop 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 Winthrop
Water temperature in Winthrop today is 63.5°F. Based on our historical data over a period of ten years, the warmest water in this day in Winthrop was recorded in 2016 and was 65.8°F, and the coldest was recorded in 2020 at 60.1°F. Sea water temperature in Winthrop is expected to drop to 60.8°F in the next 10 days. September average water temperature in Winthrop is 63.9°F, the minimum temperature is 58.8°F, and the maximum is 71.4°F.
The swimming season in Winthrop lasts from July to August. During those months, Winthrop water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Winthrop in winter reaches 41.5°F, in spring 45°F, in summer the average temperature rises to 64.4°F, and in autumn it is 57.4°F.
Winthrop water temperature now
| September 22, 2025 |
|---|
| today temp |
| 63.5°F |
| September 21, 2025 |
|---|
| yesterday temp |
| 63.7°F |
The ocean salinity in Winthrop is 30.70‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Winthrop 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 Winthrop. 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 Winthrop. Data in table shown for September 22, 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' 2" | 1' 1" | 1' 1" | 1' 1" |
| 0.35 m | 0.34 m | 0.34 m | 0.34 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 2" | 1' 3" | 1' 3" | 1' 5" |
| 0.36 m | 0.37 m | 0.39 m | 0.43 m |
Surf report in Winthrop
Winthrop weather forecast
Current temperature and weather
Data in a table show Winthrop temperature today (September 22, 2025). For more information and forecast for a few days, go to the weather forecast Winthrop.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  |  |
| 58.5°F | 56.5°F | 54.5°F | 54°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | |  | |
| 59.2°F | 66.2°F | 65.8°F | 63.9°F |
You may also be interested in other sections of our site for Winthrop: Sunrise and Sunset, Tides
Winthrop water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Winthrop. 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 Winthrop 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°F | 36.3°F | 45.9°F | cold |
| Ocean water temperature in Winthrop in January | ||||
| February | 38.3°F | 34.7°F | 42.1°F | cold |
| Ocean water temperature in Winthrop in February | ||||
| March | 39.2°F | 35.2°F | 47.3°F | cold |
| Ocean water temperature in Winthrop in March | ||||
| April | 43.7°F | 36.9°F | 50.2°F | cold |
| Ocean water temperature in Winthrop in April | ||||
| May | 51.8°F | 43.5°F | 63.1°F | cold |
| Ocean water temperature in Winthrop in May | ||||
| June | 59.9°F | 52°F | 69.3°F | cold |
| Ocean water temperature in Winthrop in June | ||||
| July | 66.2°F | 59.5°F | 74.7°F | cold |
| Ocean water temperature in Winthrop in July | ||||
| August | 67.1°F | 61.9°F | 73.4°F | cold |
| Ocean water temperature in Winthrop in August | ||||
| September | 63.9°F | 58.8°F | 71.4°F | cold |
| Ocean water temperature in Winthrop in September | ||||
| October | 57.6°F | 51.4°F | 64.8°F | cold |
| Ocean water temperature in Winthrop in October | ||||
| November | 50.5°F | 45.5°F | 57.6°F | cold |
| Ocean water temperature in Winthrop in November | ||||
| December | 45.1°F | 39.6°F | 50.2°F | cold |
| Ocean water temperature in Winthrop in December | ||||
Chart monthly average water temperature in Winthrop
