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 temperature map of the Oster
Water temperature in the Oster by city today 📍
| City | Now | Swimming |
|---|---|---|
| Roslavl' | +17° | Cool for swimming |
| Shumyachi | +17° | Cool for swimming |
| Oster | +17° | Cool for swimming |
🎣 Fishing in cities on the Oster
Water temperature forecast in the Oster 📅
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature in the Oster this weekend
Water temperature in the Oster for a month
There is no exact monthly water forecast — it changes slowly. The reference is the climate normal: up to +18° in summer. The monthly normal is below.
Monthly water temperature in the Oster 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ❄ | +2 | +3 | +7 | +13 | +17 | +16 | +18 | +17 | +12 | +6 | +5 |
Climate normal (model estimate).
Swimming conditions in the Oster by month
When to swim in the Oster 🏖️
Cities on the Oster 📍
FAQ about water in the Oster ❓
What is the water temperature in the Oster now?
Now +17° — Cool for swimming.
Can you swim in the Oster?
Comfortable season — August and September.
When is water warmest in the Oster?
Warmest in August — up to +18°.
Where does the water temperature data come from?
A water temperature model (by latitude, longitude and day of year), by cities.
Water temperature archive in the Oster on this day
| City | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Roslavl' | +14° | +15° | +17° | +17° | +16° | +14° | +13° | +15° | +16° | +17° |
| Shumyachi | +14° | +15° | +17° | +17° | +16° | +14° | +14° | +15° | +17° | +17° |
| Oster | +13° | +15° | +16° | +16° | +15° | +14° | +13° | +14° | +16° | +17° |
Climate normal (model estimate for this date), not a measurement archive.
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Water temperature in the Oster — in detail
Water temperature in the Oster is tracked across 3 cities. The water is now about +17°. The page has a temperature map by city, a daily forecast and a monthly climate normal.