Seattle in April
Find out everything about the water temperature in Seattle in April. Average, minimum and maximum recorded temperatures as well as daily temperature in April for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in April
Minimum:
45.4 °F
Average:
48.8 °F
Maximum:
54.8 °F
Sea water temperature in Seattle in April
In the city of Seattle, the month of April is too cold for swimming. The minimum recorded temperature during this month was 45.4°F on April 4, 2014, with an average temperature being 48.8°F and a maximum temperature reaching 54.8°F on April 23, 2016.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Apr 1 | 47.4°F | 48.8°F | 47.1°F |
| Apr 2 | 47.7°F | 49.6°F | 46.8°F |
| Apr 3 | 47.7°F | 50.1°F | 47.0°F |
| Apr 4 | 47.5°F | 49.7°F | 46.8°F |
| Apr 5 | 47.5°F | 49.3°F | 46.4°F |
| Apr 6 | 47.4°F | 48.9°F | 46.3°F |
| Apr 7 | 47.7°F | 48.8°F | 46.6°F |
| Apr 8 | 47.9°F | 48.9°F | 46.8°F |
| Apr 9 | 48.1°F | 48.9°F | 47.0°F |
| Apr 10 | 48.4°F | 48.9°F | 47.2°F |
| Apr 11 | 48.7°F | 48.5°F | 47.4°F |
| Apr 12 | 48.7°F | 48.6°F | 47.3°F |
| Apr 13 | 48.6°F | 48.7°F | 47.1°F |
| Apr 14 | 48.6°F | 49.0°F | 46.9°F |
| Apr 15 | 48.7°F | 49.0°F | 46.4°F |
| Apr 16 | 48.7°F | 49.0°F | 46.8°F |
| Apr 17 | 48.8°F | 49.0°F | 46.9°F |
| Apr 18 | 48.9°F | 49.6°F | 46.9°F |
| Apr 19 | 49.1°F | 49.8°F | 47.0°F |
| Apr 20 | 49.4°F | 49.8°F | 47.2°F |
| Apr 21 | 49.6°F | 50.4°F | 47.0°F |
| Apr 22 | 49.6°F | 50.5°F | 46.9°F |
| Apr 23 | 49.7°F | 50.5°F | 47.0°F |
| Apr 24 | 49.6°F | 50.0°F | 46.9°F |
| Apr 25 | 49.7°F | 49.8°F | 47.0°F |
| Apr 26 | 49.8°F | 49.7°F | 47.1°F |
| Apr 27 | 50.0°F | 49.6°F | 47.8°F |
| Apr 28 | 50.1°F | 49.8°F | 49.6°F |
| Apr 29 | 50.2°F | 49.7°F | 49.9°F |
| Apr 30 | 50.5°F | 49.8°F | 50.3°F |
In an average year, Seattle offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Seattle was recorded on July 6, 2021, reaching a 63.4°F. While the coldest temperature occurred on February 5, 2014, dipping to 44.4°F. The average readings by season are 47.6°F in Winter, 49.6°F in Spring, 57.1°F in Summer, and 54.3°F in Autumn.
The average temperature in April is slightly warmer than March's average of 47.0°F. And in May, the temperature is expected to rise further, potentially reaching an average of 52.8°F.