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      Elev 34 ft, 41.266 °N 72.376 °W

      Old Saybrook, CT

      Knollwood Beach Station64°
      Updated: 7:17 AM EDT on September 20, 2026 (GMT -4)
      8 minutes ago
      69°
      61°
      64
      Feels Like 64
      Mostly Cloudy
      N
      7
      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 68°f
         100% Precip. / 0.52 in
        Periods of rain. Potential for heavy rainfall. High 68F. Winds SE at 10 to 15 mph. Chance of rain 100%. Rainfall around a half an inch.
        Tonight
        Sun 09/20
        Low 59°f
         79% Precip. / 0.21 in
        Steady light rain this evening. Showers continuing overnight. Low 59F. SE winds shifting to N at 10 to 20 mph. Chance of rain 80%.
        Tomorrow
        Mon 09/21
        High 69°f57°f
         19% Precip. / 0 in
        Mostly cloudy. High 69F. Winds NE at 10 to 20 mph.
        Hourly Forecast
        Now
        62°
        8AM
        38%
        63°
        9AM
        35%
        64°
        10AM
        100%
        65°
        11AM
        100%
        66°
        12PM
        100%
        66°
        1PM
        100%
        66°
        2PM
        87%
        66°
        3PM
        83%
        67°
        4PM
        81%
        67°
        5PM
        56%
        67°
        6PM
        38%
        67°
        6:49PM
        Sunset
        7PM
        64%
        67°
        8PM
        69%
        67°
        9PM
        77%
        67°
        10PM
        80%
        67°
        11PM
        53%
        68°
        12AM
        49%
        67°
        1AM
        43%
        66°
        2AM
        34%
        65°
        3AM
        53%
        63°
        4AM
        51%
        62°
        5AM
        61°
        6AM
        61°
        6:35AM
        Sunrise
        7AM
        60°
        Precipitation
        100%
        Rain possible around 8:45 AM
        Pollen
        None
        Air Quality
        26
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.1 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point55°F
        5. Humidity 78%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSNC Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 69°F 71°F 84°F 1983
        4. Low 61°F 57°F 44°F 1979
        5. Rain/Snow Depth
        6. Precipitation 0.72 in 0.11 in -
        7. Snow 0 in - in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 69°F 71°F 88°F
        4. Low 61°F 57°F 45°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:35 AM 6:50 PM
        3. Civil Twilight 6:07 AM 7:17 PM
        4. Nautical Twilight 5:35 AM 7:49PM
        5. Astronomical Twilight 5:01 AM 8:22 PM
        1. Length of Visible Light 13h 10m
        2. Length of Day 12h 14m
        3. Tomorrow will be 2 minutes 43 seconds shorter
        1. Moon 3:55 PM -
        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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