Siesta Key — Water Temperature in January
Water Temperature Range
59°F
minimum
64°F
average
73°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 | 2026 | 2025 | 2024 | 2023 |
|---|---|---|---|---|
| JAN 1 | 68°F | 68°F | 72°F | 68°F |
| JAN 2 | 66°F | 68°F | 66°F | 70°F |
| JAN 3 | 66°F | 68°F | 66°F | 63°F |
| JAN 4 | 66°F | 66°F | 66°F | 59°F |
| JAN 5 | 64°F | 66°F | 66°F | 59°F |
| JAN 6 | 66°F | 64°F | 64°F | 63°F |
| JAN 7 | 66°F | 64°F | 64°F | 63°F |
| JAN 8 | 66°F | 64°F | 64°F | 61°F |
| JAN 9 | 66°F | 64°F | 64°F | 68°F |
| JAN 10 | 66°F | 63°F | 63°F | 68°F |
| JAN 11 | 68°F | 63°F | 63°F | 68°F |
| JAN 12 | 68°F | 63°F | 63°F | 68°F |
| JAN 13 | 66°F | 61°F | 63°F | 59°F |
| JAN 14 | 68°F | 63°F | 63°F | 59°F |
| JAN 15 | 68°F | 61°F | 63°F | 59°F |
| JAN 16 | 66°F | 61°F | 63°F | 64°F |
| JAN 17 | 66°F | 61°F | 61°F | 63°F |
| JAN 18 | 66°F | 61°F | 61°F | 66°F |
| JAN 19 | 66°F | 61°F | 61°F | 64°F |
| JAN 20 | 66°F | 61°F | 61°F | 68°F |
| JAN 21 | 66°F | 59°F | 63°F | 63°F |
| JAN 22 | 61°F | 61°F | 63°F | 61°F |
| JAN 23 | 63°F | 61°F | 63°F | 70°F |
| JAN 24 | 61°F | 61°F | 66°F | 59°F |
| JAN 25 | 61°F | 59°F | 64°F | 59°F |
| JAN 26 | 63°F | 57°F | 66°F | 61°F |
| JAN 27 | 64°F | 57°F | 64°F | 68°F |
| JAN 28 | 64°F | 55°F | 68°F | 66°F |
| JAN 29 | 64°F | 55°F | 64°F | 66°F |
| JAN 30 | 61°F | 55°F | 66°F | 64°F |
| JAN 31 | 61°F | 57°F | 66°F | 63°F |
January: Climate and Swimming Opportunities
Average Night Air Temperature
50°F
Average Day Air Temperature
72°F
Precipitation Amount per Month
1.50 in
Number of Rainy Days
7
Daylight per Day
10 hrs
Sunshine per Day
7 hrs
Average Wind Speed
9 mph
Average Humidity
75%
At such water and air temperatures, swimming feels cool and invigorating. It’s comfortable for a quick dip, and you’ll feel fine as long as you warm up soon after.