Montauk, Long Island weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Good
Best time to visit: July – August
What is the weather like in Montauk, Long Island in July?
In July, Montauk, Long Island is warm: daytime highs average 24 °C, and even at night it stays warm at around 21 °C. The sea averages 20.4 °C – refreshing for a swim. The sun shines for around 9 hours a day. Rain falls on about 8 days, adding up to 77 mm. The air is often humid and muggy. All in all, July is a good month for a holiday in Montauk, Long Island.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 52 min05:28 – 20:20
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 21 daysdew point 18 °C or moreAll months
- Wind
- 28 km/haverage daily peakAll months
- Cloud cover
- 51 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %75 %
- Seaweight 25 %49 %
- Sunshineweight 20 %95 %
- Few rainy daysweight 20 %71 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Rain jacket or umbrella
Montauk, Long Island in July: quick answers
Is Montauk, Long Island hot in July?
Warm rather than hot: in July, daytime highs in Montauk, Long Island average 24 °C and nights cool to about 21 °C.
Can you swim in Montauk, Long Island in July?
Yes. In July the sea averages 20.4 °C – refreshing for a swim.
Does it rain much in Montauk, Long Island in July?
Rain falls on about 8 days, adding up to 77 mm.
Montauk, Long Island month by month
The whole year in Montauk, Long IslandAll destinations: USAWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences