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      Elev 177 ft, 40.920 °N 73.069 °W

      Port Jefferson Station, NY

      Port Jefferson Station Station66°
      Updated: 2:24 PM EDT on September 20, 2026 (GMT -4)
      7 minutes ago
      69°
      59°
      66
      Feels Like 66
      Showers in Vicinity
      N
      10
      Gusts 19 mph
      Similar temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Sun 09/20
        High 67°f
         100% Precip. / 0.13 in
        Rain likely. High 67F. Winds SSE at 10 to 15 mph. Chance of rain 100%.
        Tonight
        Sun 09/20
        Low 59°f
         66% Precip. / 0.06 in
        Showers early, then cloudy overnight. Low 59F. SSW winds shifting to N at 10 to 20 mph. Chance of rain 70%.
        Tomorrow
        Mon 09/21
        High 69°f58°f
         15% Precip. / 0 in
        Cloudy. High 69F. Winds NNE at 10 to 20 mph.
        Hourly Forecast
        Now
        65°
        3PM
        87%
        65°
        4PM
        51%
        65°
        5PM
        72%
        65°
        6PM
        77%
        66°
        6:52PM
        Sunset
        7PM
        67°
        8PM
        33%
        67°
        9PM
        42%
        67°
        10PM
        67%
        67°
        11PM
        52%
        67°
        12AM
        31%
        67°
        1AM
        66°
        2AM
        65°
        3AM
        64°
        4AM
        62°
        5AM
        61°
        6AM
        61°
        6:38AM
        Sunrise
        7AM
        60°
        8AM
        60°
        9AM
        61°
        10AM
        62°
        11AM
        63°
        12PM
        65°
        1PM
        66°
        2PM
        67°
        Precipitation
        87%
        Rain likely to continue
        Pollen
        None
        Air Quality
        22
        Good
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 29.97 in
        2. Visibility 7 miles
        3. Clouds Cloudy
        4. Dew Point63°F
        5. Humidity 96%
        6. Rainfall 0.4 in
        7. Snow Depth 0 in
         KISP Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 69°F 74°F 91°F 1983
        4. Low 59°F 58°F 44°F 1979
        5. Rain/Snow Depth
        6. Precipitation 0.18 in - in -
        7. Snow 0 in - in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 69°F 73°F 93°F
        4. Low 59°F 58°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:37 AM 6:52 PM
        3. Civil Twilight 6:10 AM 7:20 PM
        4. Nautical Twilight 5:38 AM 7:52PM
        5. Astronomical Twilight 5:05 AM 8:25 PM
        1. Length of Visible Light 13h 9m
        2. Length of Day 12h 14m
        3. Tomorrow will be 2 minutes 42 seconds shorter
        1. Moon 3:57 PM 12:02 AM
        2. Waxing Gibbous68% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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