This is a climate-model estimate, not a measurement: we have no measured water temperature for rivers, lakes and reservoirs yet. Real measurements are available for seas only.
Water bodies in Aarau 🌊
Map of water bodies in Aarau
Water temperature in Aarau for a month
There is no exact monthly water forecast — the reference is the climate normal: in summer the water warms to about +18°. The monthly normal is below.
Monthly water temperature in Aarau 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +1 | +3 | +4 | +7 | +10 | +16 | +18 | +17 | +15 | +11 | +6 | +2 |
Climate normal (model estimate).
Water temperature archive in Aarau on this day
| Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Water | +20° | +20° | +19° | +18° | +18° | +19° | +19° | +20° | +19° | +19° |
Climate normal (model estimate for this date), not a measurement archive.
When to swim in Aarau 🏖️
Where else to swim nearby 🏝️
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FAQ about water in Aarau ❓
What is the water temperature in Aarau now?
Now +19° — Comfortable for swimming.
When to swim in Aarau?
Comfortable season — July and August.
When is the water in Aarau warmest?
Warmest in July — up to +18°.
What bodies of water are there in Aarau?
Aare.
Water temperature in Aarau — in detail
A summary page of water temperature across all bodies of water in Aarau: Aare. Now about +19°. For seas the temperature is measured SST; for rivers and lakes it is a climate estimate.