Hercules
California, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Hercules, CA

Ocean temperature

In Hercules, California, in July, the average water temperature is 55.4°F (13°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in July in Hercules, California, is 14.5h.

What is the water temperature in July in Hercules?

In Hercules, California, in July, the average water temperature is 55.4°F (13°C). Swimming in 55.4°F (13°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Hercules have in July?

In Hercules, California, the average length of the day in July is 14.5h.
Average sea temperature in July - Hercules, CA
  • Average sea temperature in July: 55.3°F

The best month for swimming (with the highest average sea temperature) is September (57°F).
The coldest month (with the lowest average sea temperature) is April (52.6°F).

Average daylight in July - Hercules, CA
  • Average daylight in July: 14.5h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.6h).