The highest day temperature in May 2026 was 79°F. The lowest night temperature was 45°F. The average values for day and night temperatures during May were 63.2°F и 53.5°F respectivly.

The average sea surface temperature in May 2026 for Montauk was 50.7°F. The maximum and minimum values were 46.0°F and 55.2°F respectively.

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

Precipitation total in May for Montauk is 1.1 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 11.3 mph.

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 May is 7.9 hours.