Monthly Seattle water temperature chart
The bar chart below shows the average monthly sea temperatures at Seattle over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 7.5 | 7.4 | 7.6 | 7.6 | 8.1 | 8.6 | 10.3 | 11.7 | 11.7 | 10.5 | 9.1 | 8.1 |
| °F | 45.5 | 45.3 | 45.7 | 45.7 | 46.6 | 47.5 | 50.5 | 53.1 | 53.1 | 50.9 | 48.4 | 46.6 |
Monthly average max / min water temperatures
The graph below shows the range of monthly water temperatures over several years.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 6.5 | 6.4 | 6.4 | 6.7 | 6.7 | 7.1 | 9.2 | 10.6 | 10.9 | 9.2 | 8.2 | 7.4 |
| Max °C | 8.6 | 8.4 | 8.8 | 8.6 | 9.5 | 10.2 | 11.5 | 12.9 | 12.5 | 11.8 | 10.1 | 8.8 |
| Min °F | 44.5 | 44.3 | 44.5 | 44.8 | 45.2 | 46 | 49.4 | 52 | 52.3 | 49.6 | 47.5 | 45.9 |
| Max °F | 46.6 | 46.3 | 46.9 | 46.7 | 48 | 49.1 | 51.7 | 54.3 | 53.9 | 52.2 | 49.4 | 47.3 |