Shelter Island Sound at Shelter Island, New York water temperature
Shelter Island Sound at Shelter Island, New York · Sea/Coast
The current water temperature at Shelter Island Sound at Shelter Island is 23.6 °C (as of September 11, 2026, source: USGS).
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 376 data points since July 27, 2026.
Lowest recorded value: 23.3 °C on September 10, 2026 · highest value: 27.6 °C on August 10, 2026.
In September, temperatures have ranged between 23.3 °C and 24.7 °C.
The current value is 0.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Shelter Island Sound at Shelter Island right now?
The current water temperature is 23.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Shelter Island Sound at Shelter Island?
Currently 23.6 °C (updated continuously).
How warm is at Shelter Island Sound at Shelter Island in September?
In September, the water temperature recently averaged 24.0 °C.
When is the water warmest at Shelter Island Sound at Shelter Island?
Across the measurement record, August is on average the warmest month (25.5 °C).
