North Plymouth
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
North Plymouth, MA

Ocean temperature

In North Plymouth, Massachusetts, the average seawater temperature in September is 65.8°F (18.8°C).
Note: For most, swimming in 65.8°F (18.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In North Plymouth, the average length of the day in September is 12.5h.

What is the ocean temperature in September in North Plymouth?

In North Plymouth, Massachusetts, in September, the average water temperature is 65.8°F (18.8°C). For swimming, a surface water temperature of 65.8°F (18.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in North Plymouth?

The average length of the day in September in North Plymouth is 12.5h.
Average sea temperature in September - North Plymouth, MA
  • Average sea temperature in September: 65.8°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

Average daylight in September - North Plymouth, MA
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).