The highest day temperature in July 2025 was 81°F. The lowest night temperature was 70°F. The average values for day and night temperatures during July were 75.2°F и 73.3°F respectivly.

The average sea surface temperature in July 2025 for Montauk was 71.0°F. The maximum and minimum values were 66.2°F and 74.0°F respectively.

You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in July for Montauk is 1.0 in. This value is relatively stable throughout the year.

The average wind speed in July is 9.1 mph. It makes July the most windless month of the year for Montauk.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Montauk in July is 7.8 hours.