Great Bay water temperature

Great Bay, Oyster River · Sea/Coast

The current water temperature at Great Bay is 17.2 °C (as of September 23, 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.

17.2 °C

Measured: September 23, 2026 · continuously updated

💧 Water 17.2° · ☀️ Air 16.2°

Nearby waters

Great Bay, Lamprey River · 6.4 km away19.9 °C Great Bay · 7.7 km away20.3 °C Atlantic, Great Bay Buoy · 7.8 km away17.6 °C Isinglass River, Rochester Neck Rd, near Dover, New Hampshire · 11.8 km away13.6 °C Atlantic, Seavey Island, ME · 14.9 km away16.3 °C

More measuring points: Great Bay

Great Bay20.3 °C Lamprey River19.9 °C

Frequently asked questions

Can you swim at Great Bay right now?
The current water temperature is 17.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Great Bay?
Currently 17.2 °C (updated continuously).

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