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 Issa
Water temperature in the Issa by city today 📍
🎣 Fishing in cities on the Issa
Water temperature forecast in the Issa 📅
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature in the Issa this weekend
Water temperature in the Issa for a month
There is no exact monthly water forecast — it changes slowly. The reference is the climate normal: up to +17° in summer. The monthly normal is below.
Monthly water temperature in the Issa 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +2 | +1 | +3 | +9 | +11 | +13 | +17 | +17 | +13 | +9 | +6 | +3 |
Climate normal (model estimate).
Swimming conditions in the Issa by month
When to swim in the Issa 🏖️
Cities on the Issa 📍
FAQ about water in the Issa ❓
What is the water temperature in the Issa now?
Now +13° — Cold water.
Can you swim in the Issa?
Comfortable season — August.
When is water warmest in the Issa?
Warmest in August — up to +17°.
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 Issa on this day
| City | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Insar | +16° | +15° | +14° | +12° | +13° | +15° | +16° | +16° | +14° | +13° |
| Issa | +17° | +16° | +14° | +13° | +13° | +15° | +17° | +16° | +14° | +13° |
| Insar | +18° | +17° | +15° | +14° | +14° | +16° | +18° | +17° | +15° | +14° |
Climate normal (model estimate for this date), not a measurement archive.
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Water temperature in the Issa — in detail
Water temperature in the Issa is tracked across 3 cities. The water is now about +13°. The page has a temperature map by city, a daily forecast and a monthly climate normal.