The highest day temperature in July 2025 was 98°F. The lowest night temperature was 62°F. The average values for day and night temperatures during July were 85.5°F и 71.2°F respectivly.

The average sea surface temperature in July 2025 for Old Saybrook was 72.8°F. The maximum and minimum values were 66.4°F and 76.2°F respectively.

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

Precipitation total in July for Old Saybrook is 1.5 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 7.2 mph. It makes July the most windless month of the year for Old Saybrook.

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 Old Saybrook in July is 8.0 hours.