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.
Comfortable for swimming. Now in the Tama +20°. Swimming season — from May to October.
Water temperature map of the Tama
ColderWarmer
Water temperature in the Tama by city for 3 days 📍
| City | for 3 days | Swimming |
|---|---|---|
| Hachioji | +20° | Comfortable for swimming |
🎣 Fishing in cities on the Tama
Water temperature forecast in the Tama for 3 days 📅
Tuesday
25 August
+20°
Wednesday
26 August
+20°
Thursday
27 August
+20°
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature chart in the Tama for 3 days 📈
+20°
minimum for 3 days
+20°
maximum for 3 days
→
steady
🏊
For 3 days: the water will warm to +20° — cool but swimmable.
Water questions for 3 days ❓
What is the water in the Tama for 3 days?
From +20° to +20° by the climate model; trend — steady.
Will the water warm up by the weekend?
On Saturday about +19°.
Can you swim in the Tama for 3 days?
the water will warm to +20° — cool but swimmable.
Water temperature forecast in the Tama for 3 days. Daily values and by-city temperatures for this horizon to plan a trip and a swim. Full reference data — map, monthly climate normal, yearly archive and swimming season — is on the main page.