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Sea Temperature in Seattle in April
Complete information on the sea temperature range in the Salish Sea in Seattle in April. Historical daily data. Climate details for April. Tips on swimming conditions and beach relaxation in Seattle. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Seattle in April
7°C
MINIMUN
9.5°C
AVERAGE
12°C
MAXIMUM
Historical Data of Water Temperature in April in Seattle
Water Temperature Chart for Salish Sea in Seattle in April
Sea Temperature Table in Seattle in April Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Apr 1 | 9°C | 9°C | 9°C | 8.8°C |
| Apr 2 | 9°C | 9°C | 11°C | 9.3°C |
| Apr 3 | 9°C | 9°C | 9°C | 9.3°C |
| Apr 4 | 9°C | 9°C | 9°C | 9.3°C |
| Apr 5 | 9°C | 9°C | 10°C | 9.5°C |
| Apr 6 | 9°C | 9°C | 9°C | 9.3°C |
| Apr 7 | 8°C | 9°C | 10°C | 9.3°C |
| Apr 8 | 9°C | 9°C | 9°C | 9.3°C |
| Apr 9 | 9°C | 9°C | 11°C | 9.8°C |
| Apr 10 | 9°C | 9°C | 12°C | 10.0°C |
| Apr 11 | 9°C | 9°C | 10°C | 9.5°C |
| Apr 12 | 9°C | 9°C | 9°C | 9.3°C |
| Apr 13 | 9°C | 9°C | 11°C | 9.5°C |
| Apr 14 | 9°C | 9°C | 8°C | 8.8°C |
| Apr 15 | 9°C | 10°C | 12°C | 10.5°C |
| Apr 16 | 9°C | 10°C | 12°C | 10.3°C |
| Apr 17 | 9°C | 10°C | 10°C | 9.8°C |
| Apr 18 | 10°C | 10°C | 9°C | 9.8°C |
| Apr 19 | 10°C | 10°C | 8°C | 9.3°C |
| Apr 20 | 10°C | 10°C | 9°C | 9.5°C |
| Apr 21 | 10°C | 10°C | 12°C | 10.5°C |
| Apr 22 | 10°C | 10°C | 8°C | 9.5°C |
| Apr 23 | 9°C | 10°C | 12°C | 10.0°C |
| Apr 24 | 9°C | 9°C | 12°C | 9.8°C |
| Apr 25 | 10°C | 10°C | 12°C | 10.3°C |
| Apr 26 | 10°C | 10°C | 11°C | 10.0°C |
| Apr 27 | 10°C | 10°C | 9°C | 9.8°C |
| Apr 28 | 10°C | 10°C | 11°C | 10.3°C |
| Apr 29 | 10°C | 10°C | 11°C | 10.3°C |
Seattle Climate and Swimming Opportunities in April
15°C
Average Day Air Temperature
5°C
Average Night Air Temperature
72 mm
Precipitation Amount per Month
15 days
Number of Rainy Days
13 hrs
Daylight
per Day
7 hrs
Sunshine
per Day
12 km/h
Average Wind Speed
72%
Average
humidity
Seattle lies within the Washington in United States. The average daytime temperature in Seattle in April is 59°F (15°C), while the nighttime average is 41°F (5°C). There are typically 15 rainy days during the month, with a total precipitation of 2.8 inches (72 mm). The daylight duration in April in Seattle is 13 hours, with an average of 7 hours of sunshine per day. The average wind speed in April is 7 mph (12 km/h), and the humidity level is around 72%.
The water temperature in Seattle in April ranges from 46°F to 50°F (8°C to 10°C). At the beginning of the month, the average temperature is around 48°F (9°C), shifting to 50°F (10°C) by mid-April and reaching 50°F (10°C) in the last ten days. Overall, the average sea temperature in Seattle for April is 50°F (10°C). The water is frigid, but with warmer air, it might be tolerable for a quick swim. Wetsuits are recommended.
Sea Temperature in April in Nearby Cities
Frequently Asked Questions About Water Temperatures in April in Seattle
What is the sea temperature in Seattle in April?
The water temperature in the Salish Sea in Seattle in April ranges from 46°F to 50°F (8°C to 10°C).
Is it possible to swim in the Salish Sea in Seattle in April?
The average sea temperature in Seattle in April is 50°F (10°C), and the air temperature is 59°F (15°C), so the water is frigid, but with warmer air, it might be tolerable for a quick swim. Wetsuits are recommended.