Can I swim at Cooper's Beach right now?

The sea at Cooper's Beach is currently 18.7°C — fresh swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.

What will the sea temperature be at Cooper's Beach next week?

Based on long-term June averages and the latest marine model, expect the sea around Cooper's Beach to sit close to 20.9°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.

When is the best month to swim at Cooper's Beach?

July – August – September are typically the warmest months to swim at Cooper's Beach, with sea temperatures at their seasonal peak.

Do I need a wetsuit at Cooper's Beach?

With water currently at 18.7°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.

United States

New York · Atlantic Ocean

Cooper's Beach

Popular New York beach near Southampton.

Mild water with a light chop and a light breeze — comfortable conditions for most swimmers.

View on map OpenStreetMap Directions

Sea temperature now

18.7°Cmild

Good

Updated just now · Source: Open-Meteo Marine

Air temperature

18.6°C

Wave height

0.6 m

Wind

6.2 km/h

UV index

0.2 UV index

Location

Cooper's Beach on the map, with nearby beaches and live sea temperatures.

7-day forecast

Water, air, waves, wind and UV outlook for the week ahead.

Wetsuit recommendation

3/2mm fullsuit

At 18.7°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.

Surf & watersports

Spring/autumn conditions in temperate seas. A 3/2mm full wetsuit (3mm torso, 2mm limbs) is the most versatile thickness — warm enough for 2-hour sessions, flexible enough for paddling. Open-water swimmers should wear a triathlon-cut swim wetsuit.

Open-water swimming

A triathlon-style swim wetsuit keeps you warm for 45–60 minutes.

Recommendation tuned for Cooper's Beach's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.

Quick answer

Can I swim at Cooper's Beach today?

The sea is currently 18.7°C — good swimming conditions. Most swimmers will find it pleasant.

Key takeaways

• Located in New York, United States (Atlantic Ocean).
• Family friendly with calm, accessible water.
• Live data refreshed hourly from Open-Meteo Marine.

Monthly sea temperature averages

Tap any month to see what to expect — based on regional climatology.

Jan4°C Feb3°C Mar4°C Apr8°C May13°C Jun18°C Jul22°CBest Aug23°CBest Sep20°C Oct16°C Nov11°C Dec7°C

3°C → 23°C· Current month outlined· “Best” = within 2°C of the annual peak

Year-round sea temperature

Best swim months: Jul – Aug – Sep

Month	Sea	Comfort
Jan	4°C	Cold
Feb	3°C	Cold
Mar	4°C	Cold
Apr	8°C	Cold
May	13°C	Cold
Jun	18°C	Pleasant
Jul	22°C	Warm
Aug ⭐	23°C	Warm
Sep	20°C	Pleasant
Oct	16°C	Bracing
Nov	11°C	Cold
Dec	7°C	Cold