The highest day temperature in January 2026 was 53°F. The lowest night temperature was 9°F. The average values for day and night temperatures during January were 35.7°F и 28.5°F respectivly.

The average sea surface temperature in January 2026 for Sea Isle City was 38.1°F. The maximum and minimum values were 33.8°F and 40.0°F respectively.

Most of the days in January are sunny but you can also expect cloudy and gloomy days.

Precipitation total in January for Sea Isle City is 1.1 in.

The average wind speed in January is 11.7 mph. It makes January the most windy month of the year for Sea Isle City.

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 Sea Isle City in January is 5.9 hours.