Water temperature in Lake Washington (WA) in April
Is it warm enough to swim in Lake Washington in April? Average water temperature in Lake Washington in April is 48.9°F and therefore is not suitable for comfortable swimming. The warmest water in Lake Washington in April is 57.2°F, and the coldest is 42.8°F. To find out the water temperature today and in the coming days, go to Current water temperature in Lake Washington
Changes water temperature in Lake Washington in April 2025, 2024
To get an accurate forecast for the water temperature in Lake Washington for any chosen month, compare two years within a 10 year range using the chart below.
You can choose any other years:
| Day |
2025 |
2024 |
| April 1 | 48.2°F | 48.2°F |
| April 2 | 48.2°F | 48.2°F |
| April 3 | 48.2°F | 48.2°F |
| April 4 | 50°F | 48.2°F |
| April 5 | 50°F | 48.2°F |
| April 6 | 50°F | 48.2°F |
| April 7 | 50°F | 48.2°F |
| April 8 | 50°F | 46.4°F |
| April 9 | 50°F | 48.2°F |
| April 10 | 50°F | 48.2°F |
| April 11 | 50°F | 48.2°F |
| April 12 | 50°F | 50°F |
| April 13 | 51.8°F | 50°F |
| April 14 | 51.8°F | 50°F |
| April 15 | 51.8°F | 50°F |
| Day |
2025 |
2024 |
| April 16 | 51.8°F | 50°F |
| April 17 | 53.6°F | 50°F |
| April 18 | 53.6°F | 51.8°F |
| April 19 | 53.6°F | 50°F |
| April 20 | 51.8°F | 50°F |
| April 21 | 51.8°F | 51.8°F |
| April 22 | 53.6°F | 51.8°F |
| April 23 | 53.6°F | 51.8°F |
| April 24 | 53.6°F | 53.6°F |
| April 25 | 53.6°F | 51.8°F |
| April 26 | 53.6°F | 51.8°F |
| April 27 | 55.4°F | 51.8°F |
| April 28 | 55.4°F | 50°F |
| April 29 | 55.4°F | 50°F |
| April 30 | 55.4°F | 50°F |
Average water temperature in Lake Washington in April over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| | 49.8°F | 51.4°F | 48.4°F |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 48.4°F | 46.4°F | 45.5°F | 49.8°F | 51.8°F |
Lake Washington water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
