Ottawa Beach water temp
This data the coastal Ottawa Beach 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 water temperature in Ottawa Beach
Water temperature in Ottawa Beach today is 67.5°F. Based on our historical data over a period of ten years, the warmest water in this day in Ottawa Beach was recorded in 2021 and was 71.1°F, and the coldest was recorded in 2014 at 64°F. Water temperature in Ottawa Beach is expected to drop to 66.2°F in the next 10 days. September average water temperature in Ottawa Beach is 67.6°F, the minimum temperature is 59°F, and the maximum is 76.1°F.
The swimming season in Ottawa Beach lasts from July to September. During those months, Ottawa Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Ottawa Beach in winter reaches 38.8°F, in spring 41°F, in summer the average temperature rises to 67.5°F, and in autumn it is 59.5°F.
Ottawa Beach water temperature now
| September 13, 2025 |
|---|
| today temp |
| 67.5°F |
| September 12, 2025 |
|---|
| yesterday temp |
| 68°F |
Surf Forecast in Ottawa 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 Ottawa 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 Ottawa Beach. Data in table shown for September 13, 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 |
|---|---|---|---|
| 0' 1" | 0' 1" | 0' 3" | 0' 6" |
| 0.03 m | 0.03 m | 0.07 m | 0.16 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 8" | 0' 8" | 0' 9" | 0' 8" |
| 0.2 m | 0.21 m | 0.22 m | 0.21 m |
Surf report in Ottawa Beach
Ottawa Beach weather forecast
Current temperature and weather
Data in a table show Ottawa Beach temperature today (September 13, 2025). For more information and forecast for a few days, go to the weather forecast Ottawa Beach.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 64.9°F | 62.4°F | 59.9°F | 63.1°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
|  |  |  |
| 67.5°F | 72.9°F | 76.1°F | 70.2°F |
You may also be interested in other sections of our site for Ottawa Beach: Sunrise and Sunset
Ottawa Beach water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Ottawa 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 Ottawa 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 | 38.1°F | 31.5°F | 44.1°F | cold |
| Water temperature in Ottawa Beach in January | ||||
| February | 34.7°F | 31.1°F | 39.4°F | cold |
| Water temperature in Ottawa Beach in February | ||||
| March | 35.1°F | 30.9°F | 43.3°F | cold |
| Water temperature in Ottawa Beach in March | ||||
| April | 39.4°F | 31.8°F | 48.7°F | cold |
| Water temperature in Ottawa Beach in April | ||||
| May | 48.6°F | 36.3°F | 64.6°F | cold |
| Water temperature in Ottawa Beach in May | ||||
| June | 61°F | 48°F | 73.8°F | cold |
| Water temperature in Ottawa Beach in June | ||||
| July | 69.8°F | 57.2°F | 78.6°F | warm |
| Water temperature in Ottawa Beach in July | ||||
| August | 71.4°F | 60.8°F | 77.4°F | warm |
| Water temperature in Ottawa Beach in August | ||||
| September | 67.6°F | 59°F | 76.1°F | cold |
| Water temperature in Ottawa Beach in September | ||||
| October | 59.7°F | 50.4°F | 67.6°F | cold |
| Water temperature in Ottawa Beach in October | ||||
| November | 51.3°F | 43.7°F | 60.3°F | cold |
| Water temperature in Ottawa Beach in November | ||||
| December | 43.7°F | 38.3°F | 50.2°F | cold |
| Water temperature in Ottawa Beach in December | ||||
Chart monthly average water temperature in Ottawa Beach
