Great Bay water temperature

Great Bay, Squamscott River · Sea/Coast

The current water temperature at Great Bay is 16.1 °C (as of September 30, 2026, source: NOAA NERRS SWMP).

The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.

16.1 °C

Measured: September 30, 2026 · continuously updated

💧 Water 16.1° · ☀️ Air 21.7° · high today 22.8°

Nearby waters

Great Bay, Lamprey River · 3.5 km away14.3 °C Great Bay · 4.1 km away16.6 °C Atlantic, Great Bay Buoy · 4.1 km away14.4 °C Great Bay, Oyster River · 9.1 km away17.2 °C Atlantic, Seavey Island, ME · 14.2 km away13.0 °C

More measuring points: Great Bay

Oyster River17.2 °C Great Bay16.6 °C Lamprey River14.3 °C

Frequently asked questions

Can you swim at Great Bay right now?
The current water temperature is 16.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Great Bay?
Currently 16.1 °C (updated continuously).

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