New Hampshire, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Salem, NH

Ocean temperature

In Salem, New Hampshire, in April, the average water temperature is 43°F (6.1°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.


The average length of the day in April in Salem is 13.4h.

What is the water temperature in April in Salem?

In April, the average ocean temperature is 43°F (6.1°C). Swimming in 43°F (6.1°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 Salem have in April?

In April, the average length of the day in Salem, New Hampshire, is 13.4h.
Average sea temperature in April - Salem, NH
  • Average sea temperature in April: 6.1°C

The best month for swimming (with the highest average sea temperature) is August (19.1°C).
The coldest month (with the lowest average sea temperature) is March (3.8°C).

Average daylight in April - Salem, NH
  • Average daylight in April: 13.4h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).