Hercules Water Temperature
(Today) 2024
The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.
*Live data from Martinez-Amorco Pier, CA: 21.2°C / 70.2°F
Current weather
(clear sky)
![Partly cloudy](/images/weather/partly_cloudy.png)
The measurements for the water temperature in Hercules, California 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.
*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly Hercules water temperature derived from many years of historical sea surface temperature data.
![Hercules average maximum / minimum water temperatures](/public/charts/hercules-us-water-temp.png)
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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Min °C | 10.1 | 10.1 | 10.1 | 9.6 | 9.4 | 9.1 | 11 | 12 | 12.9 | 12.4 | 11.6 | 11.2 |
Max °C | 13.6 | 13.4 | 14.2 | 13.2 | 13.6 | 13.6 | 14.3 | 14.8 | 14.8 | 15 | 14 | 13.6 |
Min °F | 51.5 | 51.5 | 51.8 | 50.7 | 50.6 | 50.1 | 53.1 | 54.7 | 55.9 | 55.4 | 53.8 | 53.1 |
Max °F | 55 | 54.8 | 55.9 | 54.3 | 54.8 | 54.6 | 56.4 | 57.5 | 57.8 | 58 | 56.2 | 55.5 |
The warmest water temperature is in September with an average around 56.8°F / 13.8°C. The coldest month is June with an average water temperature of 52.3°F / 11.3°C.
7 day tide forecast for Hercules
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*These tide times are estimates based on the nearest accurate location (Hercules, Refugio Landing, San Pablo Bay, California) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.