Crater Lake water temp
Throughout the year, the water temperature in Crater Lake does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Crater Lake in winter reaches 37.8°F, in spring 38.8°F, in summer the average temperature rises to 57.6°F, and in autumn it is 50.5°F.
Crater Lake water temperature now
You may also be interested in other sections of our site for Crater Lake: Sunrise and Sunset
Crater Lake water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Crater Lake. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years.
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 37°F | 34.5°F | 39.9°F | cold |
| February | 37.2°F | 34.3°F | 39.9°F | cold |
| March | 37°F | 35.1°F | 40.3°F | cold |
| April | 38.1°F | 35.6°F | 40.6°F | cold |
| May | 41.4°F | 38.3°F | 48°F | cold |
| June | 50.9°F | 43.9°F | 57.4°F | cold |
| July | 59.7°F | 52.5°F | 65.1°F | cold |
| August | 62.4°F | 59.5°F | 65.3°F | cold |
| September | 57.6°F | 51.3°F | 61.2°F | cold |
| October | 49.8°F | 44.6°F | 56.1°F | cold |
| November | 44.2°F | 40.1°F | 48.9°F | cold |
| December | 39.4°F | 36.7°F | 41.5°F | cold |
Chart monthly average water temperature in Crater Lake
Current temperature and weather
Data in a table show Crater Lake temperature today (October 13, 2025). For more information and forecast for a few days, go to the weather forecast Crater Lake.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 39.4°F | 36.5°F | 34.3°F | 37.8°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 |  |  |  |
| 43.9°F | 49.8°F | 48°F | 44.2°F |
