Monthly Grand Haven water temperature chart
The bar chart below shows the average monthly sea temperatures at Grand Haven over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 3.7 | 2.9 | 2.7 | 3.5 | 5.0 | 12.2 | 20.3 | 22.0 | 19.9 | 13.5 | 8.6 | 4.8 |
| °F | 38.7 | 37.2 | 36.9 | 38.3 | 41 | 54 | 68.5 | 71.6 | 67.8 | 56.3 | 47.5 | 40.6 |
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 | 2.7 | 1.3 | 1 | 2 | 1.9 | 5.1 | 15.5 | 20.3 | 16.7 | 9.7 | 5.1 | 1.8 |
| Max °C | 4.8 | 4.5 | 4.5 | 5.1 | 8.1 | 19.3 | 25.2 | 23.8 | 23.1 | 17.4 | 12.2 | 7.9 |
| Min °F | 37.7 | 35.6 | 35.2 | 36.8 | 37.9 | 46.9 | 63.7 | 69.9 | 64.6 | 52.5 | 44 | 37.6 |
| Max °F | 39.8 | 38.8 | 38.7 | 39.9 | 44.1 | 61.1 | 73.4 | 73.4 | 71 | 60.2 | 51.1 | 43.7 |