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 Arakava
Water temperature in the Arakava by city today 📍
| City | Now | Swimming |
|---|---|---|
| Kawaguchi | +22° | Comfortable for swimming |
| Omiya | +22° | Comfortable for swimming |
| Urava | +22° | Comfortable for swimming |
🎣 Fishing in cities on the Arakava
Water temperature forecast in the Arakava 📅
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature in the Arakava this weekend
Water temperature in the Arakava 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 Arakava 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +13 | +12 | +15 | +17 | +18 | +21 | +24 | +22 | +19 | +18 | +15 | +12 |
Climate normal (model estimate).
Swimming conditions in the Arakava by month
When to swim in the Arakava 🏖️
Cities on the Arakava 📍
FAQ about water in the Arakava ❓
What is the water temperature in the Arakava now?
Now +22° — Comfortable for swimming.
Can you swim in the Arakava?
Comfortable season — from April to October.
When is water warmest in the Arakava?
Warmest in July — 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 Arakava on this day
| City | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Kawaguchi | +21° | +21° | +21° | +22° | +23° | +22° | +22° | +21° | +21° | +22° |
| Omiya | +22° | +21° | +22° | +22° | +23° | +23° | +22° | +21° | +21° | +22° |
| Urava | +22° | +21° | +21° | +22° | +23° | +23° | +22° | +21° | +21° | +22° |
Climate normal (model estimate for this date), not a measurement archive.
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Water temperature in the Arakava — in detail
Water temperature in the Arakava is tracked across 3 cities. The water is now about +22°. The page has a temperature map by city, a daily forecast and a monthly climate normal.