Weather in August
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. August, sandwiched between July and September, keeps the favorable weather patterns of summer before the ensuing autumn.
Note: The majority find it unenjoyable to swim in 67.5°F (19.7°C). Breathing becomes tougher as the water temperature descends under 69.8°F (21°C).
On the first day of the month, sunrise is at 5:34 am and sunset at 7:58 pm. On the last day of August, sunrise is at 6:05 am and sunset at 7:14 pm EDT.
Ocean temperature
The month with the warmest seawater is August, with an average ocean temperature of 67.5°F (19.7°C).Note: The majority find it unenjoyable to swim in 67.5°F (19.7°C). Breathing becomes tougher as the water temperature descends under 69.8°F (21°C).
Daylight
The average length of the day in August is 13h and 49min.On the first day of the month, sunrise is at 5:34 am and sunset at 7:58 pm. On the last day of August, sunrise is at 6:05 am and sunset at 7:14 pm EDT.
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
What is the month with the warmest ocean?
With an average ocean temperature of 67.5°F (19.7°C), August is the month with the warmest seawater.
How cold is the water in August?
In Cape Cod National Seashore, Massachusetts, in August, the average water temperature is 67.5°F (19.7°C). For most, swimming in 67.5°F (19.7°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).
How many hours of daylight does Cape Cod National Seashore have in August?
The average day length in August is 13h and 49min.
When is the sunrise / sunset in August?
On the first day of August, sunrise is at 5:34 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:14 pm EDT.
Average sea temperature in August
Cape Cod National Seashore, MA
- Average sea temperature in August: 67.5°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 August
Cape Cod National Seashore, MA
- Average daylight in August: 13h and 5min
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
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location