St. Croix River at Milltown, Maine water temperature

St. Croix River at Milltown, Maine · River

The current water temperature at St. Croix River at Milltown is 22.8 °C (as of September 1, 2026, source: USGS).

A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.

22.8 °C

Measured: September 1, 2026 · continuously updated

💧 Water 22.8° · ☀️ Air 13.5° · high today 23.4°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 489 data points since July 3, 2026.

Lowest recorded value: 21.2 °C on July 23, 2026 · highest value: 27.4 °C on August 7, 2026.

Nearby waters

Lewy Lake at Princeton, Maine · 22.8 km away22.3 °C West Grand Lake at Grand Lake Stream, Maine · 37.8 km away21.7 °C Atlantic, Eastport, ME · 38.4 km away12.5 °C Atlantic, Eastport · 38.5 km away12.4 °C Atlantic, Cutler Farris Wharf · 57.5 km away12.0 °C

Frequently asked questions

Can you swim at St. Croix River at Milltown right now?
The current water temperature is 22.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at St. Croix River at Milltown?
Currently 22.8 °C (updated continuously).

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