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.
Bite in Bonn today — good 🎣
Pressure is steady, water +22° — most active: crucian carp and bream. Forecast by fish species and for the week ahead.
Bite forecast →
Water bodies in Bonn 🌊
Map of water bodies in Bonn
Water temperature in Bonn for a month
There is no exact monthly water forecast — the reference is the climate normal: in summer the water warms to about +19°. The monthly normal is below.
Monthly water temperature in Bonn 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +3 | +4 | +5 | +8 | +12 | +17 | +19 | +19 | +17 | +12 | +7 | +4 |
Climate normal (model estimate).
Water temperature archive in Bonn on this day
| Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Water | +20° | +19° | +20° | +20° | +21° | +21° | +20° | +19° | +19° | +20° |
Climate normal (model estimate for this date), not a measurement archive.
When to swim in Bonn 🏖️
Where else to swim nearby 🏝️
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FAQ about water in Bonn ❓
What is the water temperature in Bonn now?
Now +20° — Comfortable for swimming.
When to swim in Bonn?
Comfortable season — from June to September.
When is the water in Bonn warmest?
Warmest in July — up to +19°.
What bodies of water are there in Bonn?
Rhine.
Water temperature in Bonn — in detail
A summary page of water temperature across all bodies of water in Bonn: Rhine. Now about +20°. For seas the temperature is measured SST; for rivers and lakes it is a climate estimate.