Monthly Niihama water temperature chart
The bar chart below shows the average monthly sea temperatures at Niihama over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 17.2 | 16.9 | 16.9 | 18.4 | 20.8 | 23.8 | 26.6 | 27.8 | 27.0 | 25.0 | 22.7 | 20.0 |
| °F | 63 | 62.4 | 62.4 | 65.1 | 69.4 | 74.8 | 79.9 | 82 | 80.6 | 77 | 72.9 | 68 |
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 | 15.5 | 15.9 | 15.5 | 16.7 | 17.9 | 21.5 | 24.7 | 26.7 | 25.6 | 24 | 20.9 | 17.9 |
| Max °C | 18.9 | 18 | 18.3 | 20.1 | 23.7 | 26.1 | 28.5 | 28.9 | 28.4 | 26.1 | 24.6 | 22.2 |
| Min °F | 61.3 | 61.4 | 61 | 63.4 | 66.5 | 72.5 | 78 | 80.9 | 79.2 | 76 | 71.1 | 65.9 |
| Max °F | 64.7 | 63.5 | 63.8 | 66.8 | 72.3 | 77.1 | 81.8 | 83.1 | 82 | 78.1 | 74.8 | 70.2 |