My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Elev 34 ft, 41.266 °N 72.376 °W

      Old Saybrook, CT

      Knollwood Beach Station63°
      Updated: 5:48 AM EDT on September 20, 2026 (GMT -4)
      6 minutes ago
      68°
      59°
      63
      Feels Like 63
      Mostly Cloudy
      N
      6
      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. / 0.55 in
        Periods of rain. Potential for heavy rainfall. High 68F. Winds SE at 10 to 15 mph. Chance of rain 100%. Rainfall near a half an inch.
        Tonight
        Sun 09/20
        Low 58°f
         74% Precip. / 0.16 in
        A steady rain this evening. Showers continuing overnight. Low 58F. SE winds shifting to N at 10 to 15 mph. Chance of rain 70%.
        Tomorrow
        Mon 09/21
        High 70°f55°f
         19% Precip. / 0 in
        Cloudy skies early, followed by partial clearing. High around 70F. Winds NNE at 10 to 20 mph.
        Hourly Forecast
        Now
        62°
        6AM
        62°
        6:34AM
        Sunrise
        7AM
        62°
        8AM
        64°
        9AM
        41%
        65°
        10AM
        100%
        66°
        11AM
        100%
        66°
        12PM
        100%
        66°
        1PM
        89%
        66°
        2PM
        87%
        67°
        3PM
        71%
        67°
        4PM
        79%
        67°
        5PM
        61%
        67°
        6PM
        39%
        67°
        6:49PM
        Sunset
        7PM
        59%
        67°
        8PM
        72%
        67°
        9PM
        63%
        67°
        10PM
        74%
        67°
        11PM
        53%
        67°
        12AM
        50%
        67°
        1AM
        60%
        66°
        2AM
        54%
        64°
        3AM
        39%
        63°
        4AM
        33%
        62°
        5AM
        61°
        Precipitation
        100%
        Rain possible after 9 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 Point54°F
        5. Humidity 76%
        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 68°F 71°F 84°F 1983
        4. Low 59°F 57°F 44°F 1979
        5. Rain/Snow Depth
        6. Precipitation 0.71 in 0.11 in -
        7. Snow 0 in - in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 70°F 71°F 88°F
        4. Low 59°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
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareersWeather Data APIs
        PWS NetworkWundermap
        Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
        essentialaccessibility.com
        We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
        Review All Privacy and Ad Settings
        Choose how my information is shared
        Data Rights
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary