Where is the sea coldest in New York in September?

Coney Island in United States has the coldest sea in New York in September, averaging about 20.0 °C. Rockaway Beach (20.0 °C) and Jones Beach are the next coolest.

How many beaches in New York are warm enough to swim in September?

None of the top 17 ranked beaches in New York reach 22 °C in September, so a wetsuit is recommended for anything longer than a quick dip.

How are these September sea temperatures calculated?

Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

Seasonal ranking

Coldest sea temperature in New York in September

Where the sea is coolest across New York during September, ranked by long-term monthly average water temperature. Coney Island (New York, United States) is the coolest at around 20°C. Open any spot for today's live water temperature and a 7-day swim forecast.

1
Coney Island
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
2
Rockaway Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
3
Jones Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
4
Long Beach NY
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
5
Robert Moses
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
6
Fire Island
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
7
Cooper's Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
8
Main Beach East Hampton
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
9
Ditch Plains
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
10
Point Lookout Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
11
Fire Island Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
12
Smith Point Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
13
Cupsogue Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
14
Westhampton Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
15
Ponquogue Beach
New York · United States · Atlantic Ocean
Mild — fine for a swim, cool at first
20°C
September average
16
Sunset Bay Beach
New York · United States · Lake Erie
Mild — fine for a swim, cool at first
20°C
September average
17
Woodlawn Beach
New York · United States · Lake Erie
Mild — fine for a swim, cool at first
20°C
September average

Coldest sea in September elsewhere

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New York in September — frequently asked questions

Where is the sea coldest in New York in September?: Coney Island in United States has the coldest sea in New York in September, averaging about 20.0 °C. Rockaway Beach (20.0 °C) and Jones Beach are the next coolest.
How many beaches in New York are warm enough to swim in September?: None of the top 17 ranked beaches in New York reach 22 °C in September, so a wetsuit is recommended for anything longer than a quick dip.
How are these September sea temperatures calculated?: Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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