Key Largo — Water Temperature in July
Water Temperature Range
27°C
minimum
30°C
average
34°C
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 | 29°C | 29°C | 28°C | 30°C |
| JUL 2 | 29°C | 30°C | 29°C | 29°C |
| JUL 3 | 29°C | 29°C | 29°C | 30°C |
| JUL 4 | 30°C | 29°C | 30°C | 32°C |
| JUL 5 | 31°C | 29°C | 31°C | 32°C |
| JUL 6 | 30°C | 29°C | 30°C | 31°C |
| JUL 7 | 30°C | 29°C | 29°C | 31°C |
| JUL 8 | 30°C | 29°C | 30°C | 31°C |
| JUL 9 | 30°C | 29°C | 30°C | 31°C |
| JUL 10 | 30°C | 31°C | 31°C | 31°C |
| JUL 11 | 30°C | 31°C | 30°C | 32°C |
| JUL 12 | 30°C | 31°C | 30°C | 32°C |
| JUL 13 | 30°C | 30°C | 30°C | 31°C |
| JUL 14 | 30°C | 30°C | 28°C | 31°C |
| JUL 15 | 30°C | 31°C | 29°C | 31°C |
| JUL 16 | 29°C | 30°C | 29°C | 28°C |
| JUL 17 | 30°C | 30°C | 29°C | 31°C |
| JUL 18 | 30°C | 30°C | 31°C | 30°C |
| JUL 19 | 30°C | 29°C | 30°C | 31°C |
| JUL 20 | 30°C | 29°C | 30°C | 30°C |
| JUL 21 | 30°C | 30°C | 31°C | 30°C |
| JUL 22 | 30°C | 31°C | 31°C | 30°C |
| JUL 23 | 31°C | 30°C | 32°C | 31°C |
| JUL 24 | 31°C | 30°C | 32°C | 29°C |
| JUL 25 | 30°C | 30°C | 31°C | 30°C |
| JUL 26 | 30°C | 30°C | 31°C | 29°C |
| JUL 27 | 31°C | 30°C | 32°C | 30°C |
| JUL 28 | 31°C | 30°C | 31°C | 30°C |
| JUL 29 | 31°C | 31°C | 32°C | 29°C |
| JUL 30 | 31°C | 31°C | 32°C | 29°C |
| JUL 31 | 31°C | 32°C | 32°C | 30°C |
July: Climate and Swimming Opportunities
Average Night Air Temperature
25°C
Average Day Air Temperature
32°C
Precipitation Amount per Month
126 mm
Number of Rainy Days
15
Daylight per Day
13 hrs
Sunshine per Day
10 hrs
Average Wind Speed
12 km/h
Average Humidity
75%
At such water and air temperatures, swimming feels truly comfortable and relaxing. The warm water won’t cool you down, so you can stay in for a long time without getting chilled.