Kachemak Bay water temperature
Kachemak Bay, Inside Beach · Sea/Coast
The current water temperature at Kachemak Bay is 9.2 °C (as of September 20, 2026, source: NOAA NERRS SWMP · Proxy).
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: 8.7 °C on September 4, 2026 · highest value: 10.8 °C on September 9, 2026.
In September, temperatures have ranged between 8.7 °C and 10.8 °C.
The current value is 0.2 °C below the September average of this series.
Nearby waters
More measuring points: Kachemak Bay
Frequently asked questions
Can you swim at Kachemak Bay right now?
The current water temperature is 9.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Kachemak Bay?
Currently 9.2 °C (updated continuously).
How warm is at Kachemak Bay in September?
In September, the water temperature recently averaged 9.4 °C.
