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 Han
Water temperature in the Han by city today 📍
🎣 Fishing in cities on the Han
Water temperature forecast in the Han 📅
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature in the Han this weekend
Water temperature in the Han for a month
There is no exact monthly water forecast — it changes slowly. The reference is the climate normal: up to +24° in summer. The monthly normal is below.
Monthly water temperature in the Han 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +12 | +13 | +13 | +16 | +21 | +22 | +22 | +24 | +24 | +19 | +16 | +15 |
Climate normal (model estimate).
Swimming conditions in the Han by month
When to swim in the Han 🏖️
Cities on the Han 📍
FAQ about water in the Han ❓
What is the water temperature in the Han now?
Now +24° — Warm water.
Can you swim in the Han?
Comfortable season — from May to October.
When is water warmest in the Han?
Warmest in August — up to +24°.
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 Han on this day
| City | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | +24° | +24° | +24° | +23° | +23° | +23° | +24° | +24° | +24° | +24° |
| Koyan | +24° | +25° | +24° | +23° | +23° | +23° | +24° | +24° | +24° | +24° |
| Chechon | +24° | +24° | +24° | +23° | +22° | +23° | +23° | +24° | +24° | +23° |
| Chungju | +24° | +25° | +24° | +24° | +23° | +23° | +24° | +25° | +25° | +24° |
Climate normal (model estimate for this date), not a measurement archive.
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Water temperature in the Han — in detail
Water temperature in the Han is tracked across 4 cities. The water is now about +24°. The page has a temperature map by city, a daily forecast and a monthly climate normal.