Charlestown
Maryland, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Charlestown, MD

Ocean temperature

In Charlestown, Maryland, in April, the average water temperature is 47.7°F (8.7°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

In Charlestown, Maryland, the average length of the day in April is 13.3h.

How cold is the water in April in Charlestown?

In Charlestown, the average seawater temperature in April is 47.7°F (8.7°C). 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.

What is the average length of the day in April in Charlestown?

In Charlestown, Maryland, the average length of the day in April is 13.3h.
Average sea temperature in April - Charlestown, MD
  • Average sea temperature in April: 47.6°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

Average daylight in April - Charlestown, MD
  • Average daylight in April: 13.3h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.4h).