Water temperature in Half Moon Bay Beach
This data the coastal Half Moon Bay 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 Half Moon Bay Beach
Water temperature in Half Moon Bay Beach today is 21.7°C. Based on our historical data over a period of ten years, the warmest water in this day in Half Moon Bay Beach was recorded in 2022 and was 24.5°C, and the coldest was recorded in 2007 at 18.8°C. Sea water temperature in Half Moon Bay Beach is expected to drop to 21.5°C in the next 10 days. January average water temperature in Half Moon Bay Beach is 21°C, the minimum temperature is 17.9°C, and the maximum is 24.5°C.
The swimming season in Half Moon Bay Beach lasts from December to March. During those months, Half Moon Bay Beach water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Half Moon Bay Beach in winter reaches 11.6°C, in spring 14.7°C, in summer the average temperature rises to 20.5°C, and in autumn it is 17.8°C.
Half Moon Bay Beach water temperature now
| 27 January 2026 |
|---|
| today temp |
| 21.7°C |
| 26 January 2026 |
|---|
| yesterday temp |
| 21.1°C |
Surf Forecast in Half Moon Bay 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 Half Moon Bay 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 Half Moon Bay Beach. Data in table shown for 27 January 2026, 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' 6" | 0' 9" | 0' 9" | 1' 8" |
| 0.15 m | 0.23 m | 0.22 m | 0.51 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 8" | 1' 7" | 1' 4" | 1' 7" |
| 0.5 m | 0.48 m | 0.4 m | 0.47 m |
Surf report in Half Moon Bay Beach
Half Moon Bay Beach weather forecast
Current temperature and weather
Data in a table show Half Moon Bay Beach temperature today (27 January 2026). For more information and forecast for a few days, go to the weather forecast Half Moon Bay Beach.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 21.2°C | 19.4°C | 18.7°C | 25.4°C |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | |  |
| 35.1°C | 40.7°C | 41.3°C | 36.5°C |
You may also be interested in other sections of our site for Half Moon Bay Beach: Sunrise and Sunset
Half Moon Bay Beach water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Half Moon Bay 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 Half Moon Bay 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
Chart monthly average water temperature in Half Moon Bay Beach
