Swimming in Half Moon Bay in august 2025: Average sea temperature in august and tide times in august 2025
Average sea temperature in Half Moon Bay in august 2025.
In august, according to seasonal norms, the sea temperature in Half Moon Bay is:
Minimum: 55°F
Average: 57°F
Maximum: 59°F
Other useful seasonal weather averages in august:
- Outside temperature: 60°F to 67°F
- Most common weather: "Clear/Sunny"
- The wind blows at 9.9mph
- It rains a total of 0.3in, over 0 day(s).
Should we swim in Half Moon Bay in august?
No... The water temperature in Half Moon Bay in august is freezing
You won't be able to swim in Half Moon Bay in august! The water temperature is freezing, reaching as low as 55°F (and only 59°F at best)! Our advice: if you are going to Half Moon Bay this month, plan to sightsee and forget the beach!
Note also that in august, the climate is good with an average outside temperature of 64°F, 0.3in of precipitation (over 0 days) and 85.68 % humidity.
Water and normal seasonal temperatures in Half Moon Bay in august
| August | |||
| Average sea temperature | 57°F | ||
| Minimum sea temperature | 55°F | ||
| Maximum sea temperature | 59°F | ||
| Average outside temperature | 65°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 61°F | ||
| Wind speed | 11.2mph | ||
| Wind temperature | 61°F | ||
| Precipitation | 0.3in | ||
| Humidity | 86% | ||
| Visibility in kilometers | 9.55km | ||
| Cloud cover | 19% | ||
| Our opinion | freezing swimming |
Chart of the tides in august 2025
Tide times in august 2025 in Half Moon Bay
Swim elsewhere in California in august
| City | Average T° | Min. T° | Max. T° | Our opinion | Los Angeles in august | 68°F | 71°F | cool swimming | San Francisco in august | 57°F | 59°F | freezing swimming | San Diego in august | 68°F | 71°F | cool swimming | Big Sur in august | 59°F | 61°F | freezing swimming | Carmel-by-the-Sea in august | 58°F | 61°F | freezing swimming | Eureka in august | 53°F | 56°F | freezing swimming | Hollywood in august | 68°F | 71°F | cool swimming | Malibu in august | 67°F | 69°F | cool swimming | Mendocino in august | 54°F | 58°F | freezing swimming | Morro Bay in august | 59°F | 62°F | freezing swimming | Oakland in august | 57°F | 60°F | freezing swimming | Pismo Beach in august | 59°F | 62°F | freezing swimming | San Clemente in august | 69°F | 71°F | cool swimming | Santa Barbara in august | 63°F | 66°F | cold swimming | Santa Cruz California in august | 58°F | 61°F | freezing swimming | Santa Monica in august | 68°F | 70°F | cool swimming | Ventura in august | 64°F | 68°F | cool swimming | Bodega Bay in august | 55°F | 58°F | freezing swimming | Carlsbad in august | 68°F | 71°F | cool swimming | Huntington Beach in august | 68°F | 70°F | cool swimming |