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

March weather forecast and climate
Charlestown, MD

Ocean temperature

In March, the average ocean temperature in Charlestown, Maryland, is 42.3°F (5.7°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, the average length of the day in March is 12h.

How cold is the water in March in Charlestown?

In Charlestown, Maryland, the average seawater temperature in March is 42.3°F (5.7°C). Swimming in 42.3°F (5.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

In March, the average length of the day in Charlestown is 12h.
Average sea temperature in March - Charlestown, MD
  • Average sea temperature in March: 42.2°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 March - Charlestown, MD
  • Average daylight in March: 12h

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