Muir Beach water temp
This data the coastal Muir Beach 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 Muir Beach
Water temperature in Muir Beach today is 61.3°F. Based on our historical data over a period of ten years, the warmest water in this day in Muir Beach was recorded in 2021 and was 63.3°F, and the coldest was recorded in 2012 at 56.1°F. Sea water temperature in Muir Beach is expected to drop to 60.1°F in the next 10 days. September average water temperature in Muir Beach is 60.1°F, the minimum temperature is 55.6°F, and the maximum is 64.4°F.
Throughout the year, the water temperature in Muir Beach does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Muir Beach in winter reaches 53.1°F, in spring 54.1°F, in summer the average temperature rises to 58.1°F, and in autumn it is 58.3°F.
Muir Beach water temperature now
| September 12, 2025 |
|---|
| today temp |
| 61.3°F |
| September 11, 2025 |
|---|
| yesterday temp |
| 62.1°F |
The ocean salinity in Muir Beach is 31.24‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Muir 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 Muir 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 Muir 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 |
|---|---|---|---|
| 3' 11" | 4' 3" | 4' 4" | 4' 5" |
| 1.2 m | 1.3 m | 1.33 m | 1.34 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 4' 6" | 4' 6" | 4' 7" | 4' 10" |
| 1.36 m | 1.38 m | 1.4 m | 1.48 m |
Surf report in Muir Beach
Muir Beach weather forecast
Current temperature and weather
Data in a table show Muir Beach temperature today (September 13, 2025). For more information and forecast for a few days, go to the weather forecast Muir Beach.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | | |
| 59.7°F | 59.2°F | 59.2°F | 59.5°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 |  | |  |
| 62.4°F | 65.8°F | 65.1°F | 60.8°F |
You may also be interested in other sections of our site for Muir Beach: Sunrise and Sunset, Tides
Muir Beach water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Muir 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 Muir 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 | 52.5°F | 49.3°F | 56.5°F | cold |
| Ocean water temperature in Muir Beach in January | ||||
| February | 53.1°F | 49.6°F | 58.3°F | cold |
| Ocean water temperature in Muir Beach in February | ||||
| March | 53.8°F | 49.5°F | 58.3°F | cold |
| Ocean water temperature in Muir Beach in March | ||||
| April | 54.1°F | 50.4°F | 59.4°F | cold |
| Ocean water temperature in Muir Beach in April | ||||
| May | 54.5°F | 50.2°F | 59.7°F | cold |
| Ocean water temperature in Muir Beach in May | ||||
| June | 56.5°F | 51.3°F | 61.9°F | cold |
| Ocean water temperature in Muir Beach in June | ||||
| July | 58.3°F | 52.3°F | 63.1°F | cold |
| Ocean water temperature in Muir Beach in July | ||||
| August | 59.7°F | 53.4°F | 64°F | cold |
| Ocean water temperature in Muir Beach in August | ||||
| September | 60.1°F | 55.6°F | 64.4°F | cold |
| Ocean water temperature in Muir Beach in September | ||||
| October | 58.5°F | 54°F | 62.8°F | cold |
| Ocean water temperature in Muir Beach in October | ||||
| November | 56.3°F | 51.8°F | 61.3°F | cold |
| Ocean water temperature in Muir Beach in November | ||||
| December | 53.6°F | 50.5°F | 59.4°F | cold |
| Ocean water temperature in Muir Beach in December | ||||
Chart monthly average water temperature in Muir Beach
