New Jersey (United States): where to swim in October?
New Jersey, in October: the sea is at 18.8 °C on average along the coast, from 18.3 °C to 19.5 °C depending on the spot. Where the water is warmest (19.5 °C), it is pleasant. You can swim for a long time without shivering.
Sea temperature, month by month
| Month | Average temperature | Depending on the spot | Where it is warmest |
|---|---|---|---|
| January | 7.5 °C | 4.5 °C – 9.8 °C | very cold |
| February | 6.1 °C | 3.7 °C – 8.5 °C | very cold |
| March | 6.5 °C | 5.5 °C – 7.9 °C | very cold |
| April | 9.1 °C | 8.3 °C – 9.8 °C | very cold |
| May | 13.4 °C | 12.4 °C – 14.9 °C | cold |
| June | 19.1 °C | 18.1 °C – 20.3 °C | pleasant |
| July | 24.0 °C | 23.3 °C – 24.6 °C | warm |
| August | 24.7 °C | 23.9 °C – 25.6 °C | warm |
| September | 22.7 °C | 21.9 °C – 23.2 °C | warm |
| October | 18.8 °C | 18.3 °C – 19.5 °C | pleasant |
| November | 14.3 °C | 12.7 °C – 15.1 °C | cool |
| December | 10.7 °C | 8.2 °C – 12.5 °C | cold |
Compared with September, the water cools down by 3.9 °C in October. The warmest month: August (24.7 °C). The coldest: February (6.1 °C).
Nearby, in October
- Maryland 19.6 °C · pleasant
- Massachusetts 15.9 °C · cool
- New York 18.0 °C · cool
And right now?
At sea, 14.6 °C on average across 22 stations, from 11.6 °C (Absecon Creek At Absecon, NJ) to 16.6 °C (New York Harbor Entrance - 15 NM SE of Breezy Point , NY). In fresh water, 11.9 °C on average across 36 stations, from 8.7 °C (Pequest River At Pequest Nj) to 15.9 °C (Spruce Run Reservoir At Clinton Nj). New Jersey: water temperature
Frequently asked questions
What is the sea temperature in October?
New Jersey, in October: 18.8 °C on average along the coast, from 18.3 °C in the coolest waters to 19.5 °C in the warmest (average of the years 2011 to 2025).
Can you swim in October?
Where the water is warmest (19.5 °C), it is pleasant. You can swim for a long time without shivering.
What is the best month for swimming?
The water is warmest in August (24.7 °C on average) and coldest in February (6.1 °C). Where the water is warmest, it goes above 20 °C in these months: June, July, August, September.
What temperature do you need to swim comfortably?
Below 15 °C the water is cold: the cold takes your breath away and tires you quickly. Between 20 °C and 25 °C most people find it pleasant. Below 10 °C it is very cold.
Where do these temperatures come from?
These are averages of the sea surface temperature from 2011 to 2025, computed from NOAA satellite images (OISST, one value about every 50 km), in a 100 km strip along the coasts of the main country: distant territories (overseas, remote islands) are not counted. It is an estimate, not a measurement taken at the beach: lakes and rivers are not included.