Rathmines — Water Temperature in October
Water Temperature Range
61°F
minimum
67°F
average
72°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 |
|---|---|---|---|---|
| OCT 1 | 64°F | 64°F | 63°F | 64°F |
| OCT 2 | 66°F | 66°F | 64°F | 64°F |
| OCT 3 | 66°F | 66°F | 66°F | 64°F |
| OCT 4 | 68°F | 68°F | 66°F | 64°F |
| OCT 5 | 66°F | 64°F | 66°F | 64°F |
| OCT 6 | 68°F | 66°F | 68°F | 66°F |
| OCT 7 | 66°F | 64°F | 66°F | 66°F |
| OCT 8 | 66°F | 66°F | 66°F | 66°F |
| OCT 9 | 66°F | 68°F | 66°F | 64°F |
| OCT 10 | 68°F | 66°F | 66°F | 64°F |
| OCT 11 | 68°F | 66°F | 66°F | 66°F |
| OCT 12 | 68°F | 66°F | 66°F | 66°F |
| OCT 13 | 68°F | 68°F | 66°F | 66°F |
| OCT 14 | 68°F | 68°F | 64°F | 66°F |
| OCT 15 | 66°F | 68°F | 63°F | 66°F |
| OCT 16 | 68°F | 68°F | 64°F | 66°F |
| OCT 17 | 68°F | 68°F | 64°F | 66°F |
| OCT 18 | 66°F | 68°F | 63°F | 66°F |
| OCT 19 | 66°F | 66°F | 66°F | 64°F |
| OCT 20 | 68°F | 66°F | 66°F | 66°F |
| OCT 21 | 68°F | 66°F | 66°F | 68°F |
| OCT 22 | 68°F | 68°F | 66°F | 68°F |
| OCT 23 | 68°F | 66°F | 70°F | 68°F |
| OCT 24 | 70°F | 68°F | 70°F | 68°F |
| OCT 25 | 68°F | 66°F | 68°F | 66°F |
| OCT 26 | 66°F | 66°F | 68°F | 61°F |
| OCT 27 | 68°F | 68°F | 70°F | 63°F |
| OCT 28 | 68°F | 68°F | 68°F | 66°F |
| OCT 29 | 70°F | 68°F | 70°F | 68°F |
| OCT 30 | 68°F | 68°F | 68°F | 68°F |
| OCT 31 | 68°F | 66°F | 68°F | 68°F |
October: Climate and Swimming Opportunities
Average Night Air Temperature
55°F
Average Day Air Temperature
73°F
Precipitation Amount per Month
2.18 in
Number of Rainy Days
10
Daylight per Day
13 hrs
Sunshine per Day
7 hrs
Average Wind Speed
10 mph
Average Humidity
60%
With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.