Best time to swim in Seattle in the United States (USA) Sea temperature by month
Do you want to swim in the sea in Seattle in the United States (USA)? But when is the best time to go to be sure to have pleasant water for swimming in Seattle and be able to swim without catching cold? This month, or a different one? The answer is on this page, with the sea water temperature by month in Seattle, based on the average temperatures recorded in previous years.
Best time to swim in Seattle: the water temperature by month
Do you feel like swimming in Seattle in the United States (USA)? Discover the average sea temperature for each month of the year (based on previous years' data) and our opinion on swimming in the table below. For more information on the sea temperature of a specific month, click on the month's name in the table.
| Month | Average Sea temperature | Our opinion |
|---|---|---|
| January | 46°F (min: 44°F/max: 48°F) | freezing swimming |
| February | 46°F (min: 44°F/max: 47°F) | freezing swimming |
| March | 46°F (min: 44°F/max: 49°F) | freezing swimming |
| April | 46°F (min: 45°F/max: 48°F) | freezing swimming |
| May | 47°F (min: 45°F/max: 49°F) | freezing swimming |
| June | 48°F (min: 46°F/max: 51°F) | freezing swimming |
| July | 51°F (min: 49°F/max: 53°F) | freezing swimming |
| August | 54°F (min: 52°F/max: 56°F) | freezing swimming |
| September | 54°F (min: 52°F/max: 56°F) | freezing swimming |
| October | 52°F (min: 49°F/max: 54°F) | freezing swimming |
| November | 49°F (min: 47°F/max: 51°F) | freezing swimming |
| December | 47°F (min: 46°F/max: 48°F) | freezing swimming |