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

March weather forecast and climate
Sewaren, NJ

Ocean temperature

In March, the average ocean temperature in Sewaren, New Jersey, is 40.1°F (4.5°C).
Note: For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.


The average length of the day in March in Sewaren is 12h.

What is the ocean temperature in March in Sewaren?

In Sewaren, New Jersey, in March, the average water temperature is 40.1°F (4.5°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Sewaren have in March?

In March, the average length of the day is 12h.
Average sea temperature in March - Sewaren, NJ
  • Average sea temperature in March: 40.2°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight in March - Sewaren, NJ
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.3h).