New York sea temperature today: 23°C – beach water temperature, New York, United States
United States · Atlantic
New York
Sea
23.3°C73.9°F
Air
UV
Beach day
⁦23–28°C⁩

Last updated ·

Today, September 13, the sea temperature at New York is 23.3 °C (74 °F). That is 1.6 °C warmer than the usual 21.7 °C in September. Comfortable for swimming from June to October.

Climate · monthly averages

Sea temperature by month

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.

Warmest in August (23.1°C). Coldest in February (5.0°C). Comfortable for swimming from June to October.

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
MonthSea · MinSea · AvgSea · MaxAir · MinAir · AvgAir · Max
January6.6°C6.9°C7.4°C0.0°C1.2°C3.3°C
February4.0°C5.0°C6.3°C0.3°C1.9°C4.6°C
March5.6°C6.1°C6.7°C4.4°C6.9°C10.0°C
April8.1°C8.7°C9.6°C9.1°C11.9°C14.9°C
May12.8°C13.3°C14.1°C13.7°C17.0°C20.3°C
June18.2°C18.6°C19.1°C19.0°C22.3°C25.5°C
July22.3°C23.1°C23.9°C22.9°C25.9°C28.9°C
August22.6°C23.1°C23.6°C21.3°C24.1°C27.2°C
September21.2°C21.7°C22.4°C18.0°C20.6°C23.7°C
October17.2°C18.2°C19.3°C12.6°C15.0°C18.3°C
November13.5°C14.2°C14.7°C6.8°C8.7°C11.6°C
December8.9°C9.8°C10.5°C2.3°C3.6°C5.8°C

About New York

Upper New York Bay opens with the Statue of Liberty, a 93-metre copper figure designed by Frédéric-Auguste Bartholdi and gifted by France in 1886 to mark a century of American independence. Across the East River, Coney Island's boardwalk fronts a wide Brooklyn strand still anchored by the wooden Cyclone, while Rockaway Beach unspools five and a half miles of Atlantic surf reachable on the A train. The water peaks at a brisk 21-23 °C70-73 °F from July through September, with JFK airport 45 minutes away via the Van Wyck.

Frequently asked questions

Today, September 13, the sea at New York is 23.3 °C (74 °F)74 °F (23.3 °C) – ideal for swimming for most people. The usual September average is 21.7 °C71 °F.

No single number works for everyone, so the scale on this page is only a guide to how the water feels: below 13 °C55 °F icy, 13–18 °C55–64 °F cold, 18–23 °C64–73 °F refreshing, 23–28 °C73–82 °F pleasantly warm and above 28 °C82 °F like a bath. Right now the sea at New York is 23.3 °C74 °F.

In May the sea at New York (Atlantic, United States) averages 13.3 °C56 °F – cold, most people reach for a wetsuit. It keeps warming until August, when it peaks at 23.1 °C74 °F.

In October the sea at New York (Atlantic, United States) still averages 18.2 °C65 °F – refreshing, good for a short swim. It peaks in August at 23.1 °C74 °F and cools slowly from there.