Climate and monthly weather forecast
Cape Cod National Seashore, MA

Cape Cod National Seashore, Massachusetts, it comes under the classification "Cfa" as per the Köppen climate classification. This suggests it possesses a humid subtropical climate with no dry season. The geographical position and coastal influences mold its climate trends with some unique nuances. The variation in weather parameters throughout the year brings forth a distinct character to each season.

A survey through the year reveals variable sea temperatures and daylight hours. Sea temperatures fluctuate between 39°F (3.9°C) in February and a maximum of 67.5°F (19.7°C) in August. Notably, a mild progression in sea temperature is observed as winter progresses into summer. This pattern softens from late summer to winter once again, showcasing the cyclical nature of climatological trends. Meanwhile, daylight hours are initially low at 9.5 hours during January, peaking at 15.2 hours in June before gradually reducing towards the end of the year.

The Cape Cod National Seashore's climate exudes unique patterns. For instance, there is apparent escalation in daylight hours from winter to summer, peaking in June, and corresponding increase in sea temperatures. Inversely, as daylight hours truncate, there's a decrease in sea temperatures.

The idealistic time to visit Cape Cod National Seashore is typically between late July to early September when sea temperatures reach a comfortable range from 65.8°F (18.8°C) to 67.5°F (19.7°C). Concurrently, daylight hours also remain extended from 14.9 hours to 13.8 hours, allowing plenty of sun for outdoor activities. The enhanced sea temperatures during this period make it conducive for water-based adventures, from swimming to kayaking.

Planning a visit during the coldest months, particularly from January to March, might not be optimal. Sea temperature oscillates between 39°F (3.9°C) and 43.5°F (6.4°C), making it quite chilly for marine activities. Correspondingly, daylight hours are reduced to 9.5 to 12 hours during these months restricting exploration and activities.

Spring season brings forth a gradual increase in both sea temperature and daylight hours. From March through May, sea temperatures rise from 39°F (3.9°C) to 49.2°F (9.6°C). Complementing this, daylight hours also show a notable increase from 12 hours to 14.6 hours. Spring flaunts a transitionary phase with progressively warmer and brighter days.

Summer season at Cape Cod National Seashore is a delightful experience. The sea temperature soars from 57.7°F (14.3°C) in June to its annual peak of 67.5°F (19.7°C) by August. Concurrently, the daylight hours achieve their maximum length from 15.2 hours in June to 13.8 hours by August end. This combination of warm sea and extended sunlight bless the national seashore with a quintessential summer.

Autumn time conversely witnesses a decrease in both mentioned weather parameters. From September to November, the sea temperature reduces from 64.3°F (17.9°C) to 51.4°F (10.8°C), while the daylight hours shorten from 12.5 hours to 9.8 hours. The park experiences a calm, crisp transition with leaves changing hues and days becoming shorter.

Winter at Cape Cod National Seashore is marked by the year's coldest sea temperatures and shortest daylight hours. December witnesses a further plummet in sea temperature down to 46.1°F (7.8°C) by the end of the month. The daylight hours reduce to its yearly minimum at 9.2 hours. Despite minimal sunlight and lower sea temperatures, the beauty of the park during winters garners appraisals, particularly among winter sport enthusiasts.

Winter's grip descends steadily on Cape Cod National Seashore in January. Sea temperatures plummet to the low 41.5°F (5.3°C), their lowest of the year, making maritime activities less attractive. This month experiences a relatively robust transition into the New Year's winter, and one could expect less daylight—with just under 10 hours per day on average. Weather in January »

Despite the shortening of winter's tenure, February conditions at Cape Cod National Seashore maintain their chill, with similar characteristics as the preceding month. February sees the sea temperatures drop slightly further, landing at an average of 39.1°F (3.9°C). Weather in February »

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. Weather in March »

With spring in full blossom, April presents Cape Cod National Seashore with significant improvements compared to March. The sea temperature sees a rise, reaching an average of 43.5°F (6.4°C). Alongside the climbing temperature trend, daylight hours stretch further, with nearly 13.5 hours per day on average. Weather in April »

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. Weather in May »

June inaugurates the summer at Cape Cod National Seashore. The sea temperature heads into the 50s°F, with an average of 57.7°F (14.3°C), which is a significant jump from May. Daylight hours peak with more than 15 hours a day—indicating longer days and shorter nights. Weather in June »

July epitomizes summer at Cape Cod National Seashore, presenting maximum sea temperatures for the year. With the sea warming up to an average of 65.8°F (18.8°C), the month is favorable for water activities. Daylight hours remain abundant, just slightly less than June, enhancing outdoor endeavors. Weather in July »

August continues the peak summer conditions at Cape Cod National Seashore. The sea temperature reaches another high, with an average of 67.5°F (19.7°C) marking the warmest in the year. Daylight hours start their gradual decline from the peak in June and July but remain significant. Weather in August »

September brings a changing wind to Cape Cod National Seashore as summer cools off and autumn approaches. The month's sea temperatures retreat slightly to an average of 64.3°F (17.9°C). Daylight hours continue to shrink, dropping to nearly half of July's length. Weather in September »

With the arrival of October, Cape Cod National Seashore welcomes the vibrancy of fall. Sea temperatures dip to an average of 58.7°F (14.8°C) indicating cooling waters. The sunlight is less generous with the daylight hours flagging down to just above 11 hours. Weather in October »

November ushers in a discerning shift towards winter at Cape Cod National Seashore. The sea temperatures spiral down to an average of 51.4°F (10.8°C), pointing to cooler maritime conditions. Daylight hours continue to peter out at just under 10 hours. Weather in November »

December marks the return of winter conditions at Cape Cod National Seashore. With a significant plunge in sea temperature to 46.1°F (7.8°C), the cold weather asserts its dominance. Daylight diminishes, averaging 9.2 hours per day, creating shorter days and longer nights. Weather in December »