Montauk Beach Water Temperature
Sea-surface temperature at Montauk Beach, New York · times in EDT
Updated 7:03 AM EDT
How it compares today
Water temperature through the year
Monthly normals computed from 2023–2025 daily sea-surface temperature history.
Nearby water right now
7-day outlook
| Day | Air high / low | Max UV | Rain |
|---|---|---|---|
| Fri, Aug 28 | 78° / 69° | 7 | 7% |
| Sat, Aug 29 | 76° / 65° | 6 | 0% |
| Sun, Aug 30 | 74° / 67° | 7 | 16% |
| Mon, Aug 31 | 75° / 71° | 7 | 17% |
| Tue, Sep 1 | 74° / 69° | 1 | 37% |
| Wed, Sep 2 | 74° / 71° | 5 | 39% |
| Thu, Sep 3 | 75° / 71° | 7 | 37% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is Montauk Beach warm enough to swim?
At 71°F, the water at Montauk Beach is cool but swimmable. Most swimmers are comfortable without a wetsuit above 72°F; below 62°F, cold-water shock becomes a real risk for unprotected swimmers.
That is 1° below the August average of 72°F here.
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 72°F in July and dropping to about 40°F in February.
Frequently asked questions
How warm is the water at Montauk Beach right now?
The sea-surface temperature is about 71°F. That is 1° below the August average of 72°F here.
When is the water warm enough to swim at Montauk Beach?
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 72°F in July and dropping to about 40°F in February.
What is the warmest the water gets at Montauk Beach?
Around 72°F in July, based on 2023–2025 records. The coolest month is February at roughly 40°F.