Portland — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Portland, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Portland today is 22.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 21.2°C | 20.1°C | |
| AUG 5 | 21.0°C | 20.1°C | |
| AUG 6 | 21.3°C | 20.1°C | |
| AUG 7 | 22.3°C | 20.1°C | |
| AUG 8 | 22.6°C | 20.1°C | |
| AUG 9 | 22.9°C | 20.1°C | |
| AUG 10 | 23.2°C | 20.1°C | |
| AUG 11 | 23.0°C | 20.1°C | |
| AUG 12 | 20.1°C | 22.6°C | |
| AUG 13 | 20.1°C | 22.4°C | |
| AUG 14 | 20.1°C | 22.3°C | |
| AUG 15 | 20.1°C | 22.2°C | |
| AUG 16 | 20.1°C | 22.1°C | |
| AUG 17 | 20.1°C | 21.9°C | |
| AUG 18 | 20.1°C | 21.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 3°C | 4°C | 9°C |
| February | 3°C | 5°C | 9°C |
| March | 3°C | 8°C | 13°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 19°C | 22°C |
| July | 16°C | 21°C | 25°C |
| August | 17°C | 20°C | 24°C |
| September | 11°C | 16°C | 21°C |
| October | 8°C | 13°C | 16°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 7°C | 12°C |
Portland: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
In Portland, Oregon, the Columbia River flows through the city, offering opportunities for various water activities such as boating, kayaking, and fishing. However, swimming in the Columbia River is generally not recommended due to the river's cold temperatures, fast currents, and the presence of occasional debris. During the summer months, the water temperature typically ranges from 60°F to 70°F (15°C to 21°C), which can be refreshing for brief dips but may be too cold for comfortable, prolonged swimming. In early spring and late fall, the water temperature can drop to 40°F to 50°F (4°C to 10°C), making swimming unsafe and highly uncomfortable.
Despite these chilly temperatures, the Columbia River is popular for recreational boating and other activities, particularly around the areas of Tom McCall Waterfront Park and the area near the Hawthorne Bridge. Swimming is less common, and those who choose to enter the water are typically prepared with wet suits or other gear to protect against the cold. The river’s currents can also be dangerous, so safety is a primary concern for anyone considering swimming.
For those seeking a safer and warmer swimming experience, Portland has a variety of public pools and nearby lakes, like the Columbia Slough, that offer designated swimming areas with controlled conditions. Locations such as the Sellwood Riverfront Park provide opportunities for water recreation in more secure, accessible environments, making them more suitable for swimming compared to the Columbia River itself.