Climate and monthly weather forecast
Mystic Island, NJ

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Weather in January

In Mystic Island, New Jersey, the average seawater temperature in January is 43.3°F (6.3°C). Note: Beware of 43.3°F (6.3°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health. Weather in January »

Weather in February

February is the month with the coldest seawater in Mystic Island, New Jersey, with an average ocean temperature of 40.8°F (4.9°C). Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in February »

Weather in March

In Mystic Island, New Jersey, the average seawater temperature in March is 41.2°F (5.1°C). Note: Unprotected swimming in 41.2°F (5.1°C) is dangerous due to potential cold shock. Weather in March »

Weather in April

In Mystic Island, New Jersey, in April, the average water temperature is 46.6°F (8.1°C). Note: Without suitable protection, venturing into 46.6°F (8.1°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths. Weather in April »

Weather in May

In May, the average ocean temperature in Mystic Island, New Jersey, is 54.9°F (12.7°C). Note: Dipping in 54.9°F (12.7°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties. Weather in May »

Weather in June

In June, the average ocean temperature in Mystic Island, New Jersey, is 66.2°F (19°C). Note: In water of 66.2°F (19°C), the majority of people do not enjoy swimming. Weather in June »

Weather in July

In Mystic Island, New Jersey, in July, the average water temperature is 73.4°F (23°C). Note: For someone sensitive to cold, swimming in 73.4°F (23°C) waters can be invigorating, especially when considering elements like sunshine, wind, and current air temperature. Weather in July »

Weather in August

August is the month with the warmest seawater in Mystic Island, New Jersey, with an average ocean temperature of 75.7°F (24.3°C). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.7°F (24.3°C) water may be enjoyable. Weather in August »

Weather in September

In Mystic Island, New Jersey, in September, the average water temperature is 71.2°F (21.8°C). Note: Swimming in 71.2°F (21.8°C) is not an enjoyable experience for most. Weather in September »

Weather in October

In October, the average ocean temperature in Mystic Island, New Jersey, is 64.8°F (18.2°C). Note: Most people do not find pleasure in swimming when the water temperature is 64.8°F (18.2°C). Weather in October »

Weather in November

In November, the average ocean temperature in Mystic Island, New Jersey, is 55.8°F (13.2°C). Note: To swim in 55.8°F (13.2°C) at less than 50°F (10°C), ensure you're well-protected. Weather in November »

Weather in December

In Mystic Island, New Jersey, the average seawater temperature in December is 48.6°F (9.2°C). Note: Dipping into 48.6°F (9.2°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Weather in December »
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the month with the coldest ocean in Mystic Island?

February is the month with the coldest seawater in Mystic Island, New Jersey, with an average ocean temperature of 40.8°F (4.9°C).

When is Daylight Saving Time (DST) in Mystic Island?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mystic Island, New Jersey, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When are the longest days in Mystic Island?

June has the longest days of the year in Mystic Island, New Jersey, with an average of 14h and 54min of daylight.

What is the month with the warmest ocean in Mystic Island?

The month with the warmest seawater is August, with an average ocean temperature of 75.7°F (24.3°C).

What is the month with the shortest days in Mystic Island?

December has the shortest days of the year in Mystic Island, with an average of 9h and 24min of daylight.

Average sea temperature
Mystic Island, NJ

Average sea temperature - Mystic Island, NJ

The best month for swimming (with the highest average sea temperature) is August (75.8°F).
The coldest month (with the lowest average sea temperature) is February (40.8°F).

Average daylight
Mystic Island, NJ

Average daylight - Mystic Island, NJ

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

Mystic Island, New Jersey, USA

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