How cold is Cape Cod National Seashore water in summer? In June sea water temperature throughout Cape Cod National Seashore is not yet warm enough for swimming and does not exceed 68°F. Based on average water temperature observations over the past ten years, the warmest sea in Cape Cod National Seashore in June was 60.4°F (in Herring Cove Beach), and the coldest water 58.3°F (in Coast Guard Beach). To find out the sea temperature today and in the coming days, go to Current sea temperature in Cape Cod National Seashore
Cape Cod National Seashore cities and resorts with the values of the average water temperature in June in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.
To find out what the water temperature was in Cape Cod National Seashore any day over a period of the last ten years, select the month