Weather in May
May amplifies the spring signals in the
Cape Cod National Seashore area. The month observes a lasting increase in sea temperatures, signaling a definitive departure from the colder months. Daily average daylight extends further, making room for increased outdoor activities. Dowelled between
April's end and
June's onset, May makes a natural transition towards the warmth of summer.
Ocean temperature
In Cape Cod National Seashore, in May, the average water temperature is 49.1°F (9.5°C).
Note: Entering waters of 49.1°F (9.5°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
The average length of the day in May in Cape Cod National Seashore is 14h and 34min.
On the first day of May in Cape Cod National Seashore, sunrise is at 5:34 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 5:07 am and sunset at 8:08 pm EDT.
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