What month would the ocean water at the Jersey Shore be the warmest?

Monthly average max / min water temperatures The graph below shows the range of monthly Jersey City water temperature derived from many years of historical sea surface temperature data. The warmest water temperature is in August with an average around 74.3°F / 23.5°C.



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The water temperature averages just 35 °F (2 °C) in February at Atlantic City. But come spring, the sea warms up rapidly. By summer, the ocean at New Jersey beaches is hot enough for an enjoyable swim. The temperature usually reaches 74 °F (23 °C) at Cape May in late July and early August.

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Summer: July and August But not all beaches are created equal and many people prefer tropical beaches, like those found in the Caribbean in the winter, when it's also less likely to rain. If you can handle the heat, you may find better deals for cruises to these hotter islands in July and August.

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It's a process known as upwelling, which plays out along the entire U.S. Pacific coast. Upwelling explains why water temperatures along California, Oregon and Washington beaches are much cooler than similar-latitude beaches in the East.

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The combination of how much sunlight we have and what the winds are doing plays a big role in the temperatures we might feel when we're at the beach.

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