Coupeville — Water Temperature in July
Water Temperature Range
46°F
minimum
52°F
average
57°F
maximum
Water Temperature Chart for Month
The chart shows the average daily water temperature for each day of the month based on historical data.
Table of Water Temperatures by Day of the Month for Previous Years
| Day | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|
| JUL 1 | 52°F | 50°F | 52°F | 54°F |
| JUL 2 | 52°F | 50°F | 52°F | 54°F |
| JUL 3 | 52°F | 50°F | 54°F | 52°F |
| JUL 4 | 52°F | 50°F | 54°F | 52°F |
| JUL 5 | 52°F | 50°F | 54°F | 52°F |
| JUL 6 | 52°F | 50°F | 54°F | 52°F |
| JUL 7 | 52°F | 52°F | 54°F | 52°F |
| JUL 8 | 52°F | 52°F | 52°F | 54°F |
| JUL 9 | 52°F | 52°F | 54°F | 54°F |
| JUL 10 | 52°F | 50°F | 54°F | 52°F |
| JUL 11 | 52°F | 52°F | 52°F | 54°F |
| JUL 12 | 52°F | 54°F | 52°F | 54°F |
| JUL 13 | 52°F | 52°F | 52°F | 54°F |
| JUL 14 | 52°F | 52°F | 54°F | 54°F |
| JUL 15 | 52°F | 54°F | 52°F | 54°F |
| JUL 16 | 50°F | 52°F | 52°F | 46°F |
| JUL 17 | 54°F | 52°F | 52°F | 55°F |
| JUL 18 | 54°F | 52°F | 52°F | 55°F |
| JUL 19 | 52°F | 54°F | 52°F | 54°F |
| JUL 20 | 52°F | 52°F | 52°F | 55°F |
| JUL 21 | 52°F | 52°F | 54°F | 54°F |
| JUL 22 | 52°F | 52°F | 52°F | 54°F |
| JUL 23 | 52°F | 52°F | 52°F | 54°F |
| JUL 24 | 52°F | 52°F | 52°F | 54°F |
| JUL 25 | 52°F | 52°F | 52°F | 52°F |
| JUL 26 | 52°F | 52°F | 52°F | 52°F |
| JUL 27 | 52°F | 52°F | 52°F | 54°F |
| JUL 28 | 52°F | 52°F | 52°F | 54°F |
| JUL 29 | 52°F | 52°F | 52°F | 54°F |
| JUL 30 | 54°F | 52°F | 54°F | 54°F |
| JUL 31 | 54°F | 52°F | 54°F | 54°F |
July: Climate and Swimming Opportunities
Average Night Air Temperature
55°F
Average Day Air Temperature
75°F
Precipitation Amount per Month
0.51 in
Number of Rainy Days
5
Daylight per Day
15 hrs
Sunshine per Day
10 hrs
Average Wind Speed
7 mph
Average Humidity
67%
With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.