Great Bay water temperature

Great Bay · Sea/Coast

The current water temperature at Great Bay is 20.3 °C (as of September 4, 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.

20.3 °C

Measured: September 4, 2026 · continuously updated

💧 Water 20.3° · ☀️ Air 21.4° · high today 23.0°

Nearby waters

Atlantic, Great Bay Buoy · 0.2 km away20.6 °C Great Bay, Lamprey River · 5.4 km away23.1 °C Atlantic, Seavey Island, ME · 10.4 km away18.1 °C Atlantic, Seavey Island · 10.5 km away17.9 °C Atlantic, Hampton Beach · 19.0 km away20.6 °C

More measuring points: Great Bay

Lamprey River23.1 °C

Frequently asked questions

Can you swim at Great Bay right now?
The current water temperature is 20.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Great Bay?
Currently 20.3 °C (updated continuously).

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