San Rafael (CA) water temp
This data the coastal San Rafael 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 San Rafael
Water temperature in San Rafael today is 64.9°F. Based on our historical data over a period of ten years, the warmest water in this day in San Rafael was recorded in 2019 and was 64.8°F, and the coldest was recorded in 2013 at 56.7°F. Sea water temperature in San Rafael is expected to drop to 60.8°F in the next 10 days. September average water temperature in San Rafael is 61.5°F, the minimum temperature is 55.8°F, and the maximum is 67.5°F.
Throughout the year, the water temperature in San Rafael does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in San Rafael in winter reaches 52.9°F, in spring 55.4°F, in summer the average temperature rises to 59.7°F, and in autumn it is 59.4°F.
San Rafael water temperature now
| September 26, 2025 |
|---|
| today temp |
| 64.9°F |
| September 25, 2025 |
|---|
| yesterday temp |
| 65.5°F |
The ocean salinity in San Rafael is 25.14‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in San Rafael 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 San Rafael. 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 San Rafael. Data in table shown for September 26, 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' 3" | 1' 5" |
| 0.35 m | 0.33 m | 0.37 m | 0.43 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 6" | 1' 7" | 1' 7" | 1' 7" |
| 0.45 m | 0.47 m | 0.47 m | 0.48 m |
Surf report in San Rafael
San Rafael weather forecast
Current temperature and weather
Data in a table show San Rafael temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast San Rafael.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  |  |  |
| 59.5°F | 59.4°F | 59.4°F | 59.5°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | |  |
| 66.2°F | 68.7°F | 66°F | 61.3°F |
You may also be interested in other sections of our site for San Rafael: Sunrise and Sunset, Tides
San Rafael water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in San Rafael. 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 San Rafael 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 | 52°F | 49.5°F | 55.4°F | cold |
| Ocean water temperature in San Rafael in January | ||||
| February | 53.1°F | 49.5°F | 58.3°F | cold |
| Ocean water temperature in San Rafael in February | ||||
| March | 54.3°F | 48.7°F | 58.8°F | cold |
| Ocean water temperature in San Rafael in March | ||||
| April | 55.6°F | 50.9°F | 61.3°F | cold |
| Ocean water temperature in San Rafael in April | ||||
| May | 56.1°F | 50.4°F | 62.8°F | cold |
| Ocean water temperature in San Rafael in May | ||||
| June | 58.1°F | 51.6°F | 65.1°F | cold |
| Ocean water temperature in San Rafael in June | ||||
| July | 59.7°F | 53.4°F | 65.7°F | cold |
| Ocean water temperature in San Rafael in July | ||||
| August | 61.2°F | 54°F | 68.2°F | cold |
| Ocean water temperature in San Rafael in August | ||||
| September | 61.5°F | 55.8°F | 67.5°F | cold |
| Ocean water temperature in San Rafael in September | ||||
| October | 59.7°F | 54.3°F | 66.4°F | cold |
| Ocean water temperature in San Rafael in October | ||||
| November | 56.8°F | 52.2°F | 62.1°F | cold |
| Ocean water temperature in San Rafael in November | ||||
| December | 53.4°F | 50°F | 59°F | cold |
| Ocean water temperature in San Rafael in December | ||||
Chart monthly average water temperature in San Rafael
