Crater Lake Current Water Temperature and Forecast

As of today, the minimum water temperature in the Crater Lake ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart for Crater Lake Over the Last 30 Days

Today the water temperature in Crater Lake is lower than the same day in previous years. The water temperature range here in April is from 43°F to 59°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Crater Lake are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Monthly Water Temperature Histogram for Crater Lake