Weather in March
March invariably initiates the weather change in Cape Cod National Seashore. Sea temperatures barely shift from the previous month, stabilizing around 39°F (3.9°C). However, daylight hours noticeably increase, averaging 12 hours daily—providing welcome relief from the longer winter nights. The first signs of the forthcoming spring are evident in March's increased daylight and practically unchanged sea temperatures.
Note: In the case of swimming, the extreme coldness, danger, and life-threatening nature of this situation are apparent. Without insulated waterproof wear, hypothermia sets in rapidly.
On the first day of the month, sunrise is at 6:13 am and sunset at 5:30 pm EST. On the last day of March, sunrise is at 6:22 am and sunset at 7:04 pm EDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.
Ocean temperature
The month with the coldest seawater is March, with an average ocean temperature of 39°F (3.9°C).Note: In the case of swimming, the extreme coldness, danger, and life-threatening nature of this situation are apparent. Without insulated waterproof wear, hypothermia sets in rapidly.
Daylight
In March, the average length of the day is 11h and 58min.On the first day of the month, sunrise is at 6:13 am and sunset at 5:30 pm EST. On the last day of March, sunrise is at 6:22 am and sunset at 7:04 pm EDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
When is the ocean coldest?
March is the month with the coldest seawater, with an average ocean temperature of 39°F (3.9°C).
What is the ocean temperature in March?
In Cape Cod National Seashore, the average seawater temperature in March is 39°F (3.9°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.
What is the average length of the day in March?
The average day length in March is 11h and 58min.
When is the sunrise / sunset in March?
On the first day of March, sunrise is at 6:13 am and sunset at 5:30 pm EST. On the last day of the month, sunrise is at 6:22 am and sunset at 7:04 pm EDT.
When does Daylight Saving Time (DST) start in March?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. DST ends Sunday, November 3. 2024, at 2:00 am.
Average sea temperature in March
Cape Cod National Seashore, MA
- Average sea temperature in March: 39°F
The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight in March
Cape Cod National Seashore, MA
- Average daylight in March: 12h and 0min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
Cape Cod National Seashore, Massachusetts, USA
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