New Castle Water Temperature
19°C / 66°F
The measurements for the water temperature in New Castle, Delaware are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
Monthly average water temp
Monthly average max / min water temperatures
The graph below shows the range of monthly New Castle water temperature derived from many years of historical sea surface temperature data.
The warmest water temperature is in August with an average around 76.3°F / 24.6°C. The coldest month is February with an average water temperature of 40.8°F / 4.9°C.
7 day tide forecast for New Castle
*These tide times are estimates based on the nearest accurate location (New Castle, Chesapeake and Delaware Canal, Delaware) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.