United States: where to swim in June?
United States, in June: the sea is at 21.2 °C on average along the coast, from 12.5 °C to 28.8 °C depending on the spot. Where the water is warmest (28.8 °C), it is very warm. Almost lukewarm: you can get in without any cold shock.
Sea temperature, month by month
| Month | Average temperature | Depending on the spot | Where it is warmest |
|---|---|---|---|
| January | 14.4 °C | 7.1 °C – 22.1 °C | pleasant |
| February | 13.8 °C | 5.4 °C – 21.7 °C | pleasant |
| March | 14.5 °C | 5.6 °C – 22.4 °C | pleasant |
| April | 16.1 °C | 7.5 °C – 24.2 °C | warm |
| May | 18.5 °C | 11.0 °C – 26.0 °C | warm |
| June | 21.2 °C | 12.5 °C – 28.8 °C | very warm |
| July | 23.2 °C | 13.8 °C – 29.9 °C | very warm |
| August | 23.8 °C | 14.7 °C – 30.4 °C | very warm |
| September | 23.0 °C | 14.5 °C – 29.4 °C | very warm |
| October | 21.2 °C | 13.5 °C – 28.2 °C | very warm |
| November | 18.2 °C | 11.5 °C – 25.6 °C | warm |
| December | 16.1 °C | 9.2 °C – 23.7 °C | warm |
Compared with May, the water warms up by 2.7 °C in June. The warmest month: August (23.8 °C). The coldest: February (13.8 °C).
Where the water is warmest in June
- Louisiana 28.9 °C · very warm
- Texas 28.6 °C · very warm
- Alabama 28.5 °C · very warm
- Florida 28.3 °C · very warm
- Georgia 27.0 °C · very warm
- South Carolina 26.5 °C · very warm
- Hawaii 25.8 °C · warm
- North Carolina 25.6 °C · very warm
- Maryland 22.0 °C · warm
- Virginia 21.8 °C · warm
- New Jersey 19.1 °C · pleasant
- New York 17.3 °C · cool
- Massachusetts 14.5 °C · cool
- California 14.4 °C · cool
- Oregon 13.1 °C · cold
- Washington 12.7 °C · cold
- Maine 11.7 °C · cold
- Alaska 5.9 °C · cold
And right now?
For the temperature measured right now, station by station and to the hour: United States: water temperature
Frequently asked questions
What is the sea temperature in June?
United States, in June: 21.2 °C on average along the coast, from 12.5 °C in the coolest waters to 28.8 °C in the warmest (average of the years 2011 to 2025).
Can you swim in June?
Where the water is warmest (28.8 °C), it is very warm. Almost lukewarm: you can get in without any cold shock.
What is the best month for swimming?
The water is warmest in August (23.8 °C on average) and coldest in February (13.8 °C). Where the water is warmest, it goes above 20 °C in these months: January, February, March, April, May, June, July, August, September, October, November, December.
Where is the water warmest in June?
The warmest in June: Louisiana (28.9 °C), Texas (28.6 °C), Alabama (28.5 °C). The coolest: Alaska (5.9 °C).
Where do these temperatures come from?
These are averages of the sea surface temperature from 2011 to 2025, computed from NOAA satellite images (OISST, one value about every 50 km), in a 100 km strip along the coasts of the main country: distant territories (overseas, remote islands) are not counted. It is an estimate, not a measurement taken at the beach: lakes and rivers are not included.