Great Bay water temperature
Great Bay, Lamprey River · Sea/Coast
The current water temperature at Great Bay is 21.9 °C (as of September 20, 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.
Measurement series & statistics
This measurement series includes 64 data points since September 1, 2026.
Lowest recorded value: 21.4 °C on September 18, 2026 · highest value: 23.5 °C on September 2, 2026.
In September, temperatures have ranged between 21.4 °C and 23.5 °C.
The current value is 0.6 °C below the September average of this series.
Nearby waters
More measuring points: Great Bay
Frequently asked questions
Can you swim at Great Bay right now?
The current water temperature is 21.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Great Bay?
Currently 21.9 °C (updated continuously).
How warm is at Great Bay in September?
In September, the water temperature recently averaged 22.5 °C.
