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      Coastal Flood Warning
      until 6:00 PM EDT
      +2 more alerts
      Elev 26 ft, 41.025 °N 73.564 °W

      Old Greenwich, CT

      Old Greenwich Station60°
      Updated: 9:52 AM EDT on September 25, 2026 (GMT -4)
      9 minutes ago
      71°
      54°
      60
      Feels Like 60
      Fair
      N
      16
      Gusts 30 mph
      Similar temperature is expected today
      Wundermap
      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
        Fri 09/25
        High 71°f
         1% Precip. / 0 in
        Windy with increasing clouds. High 71F. Winds NNE at 20 to 30 mph. Coastal flooding possible at high tide.
        Tonight
        Fri 09/25
        Low 57°f
         67% Precip. / 0.23 in
        Windy with evening showers evolving to a steady, soaking rain overnight. Low 57F. Winds NNE at 20 to 30 mph. Chance of rain 70%. Rainfall around a quarter of an inch. Coastal flooding possible at high tide.
        Tomorrow
        Sat 09/26
        High 61°f56°f
         75% Precip. / 0.78 in
        Cloudy and windy with periods of rain. High 61F. Winds NNE at 25 to 35 mph. Chance of rain 80%. Rainfall may reach one inch. Coastal flooding possible at high tide.
        Hourly Forecast
        Now
        61°
        10AM
        61°
        11AM
        64°
        12PM
        66°
        1PM
        68°
        2PM
        69°
        3PM
        70°
        4PM
        69°
        5PM
        68°
        6PM
        67°
        6:46PM
        Sunset
        7PM
        66°
        8PM
        65°
        9PM
        33%
        63°
        10PM
        32%
        62°
        11PM
        35%
        61°
        12AM
        39%
        60°
        1AM
        59%
        60°
        2AM
        65%
        60°
        3AM
        44%
        59°
        4AM
        51%
        59°
        5AM
        67%
        59°
        6AM
        61%
        58°
        6:45AM
        Sunrise
        7AM
        66%
        58°
        8AM
        65%
        58°
        9AM
        67%
        58°
        Precipitation
        67%
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        25
        Good
        UV Index
        3
        Moderate
        Additional Conditions
        1. Pressure 30.12 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point43°F
        5. Humidity 51%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KHPN Station History
        Almanac for September 25, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 71°F 72°F 89°F 1970
        4. Low 54°F 53°F 29°F 1963
        5. Rain/Snow Depth
        6. Precipitation 0.23 in 3 in -
        7. Snow 0 in 0 in -
        Almanac for September 26, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 61°F 72°F 88°F
        4. Low 54°F 52°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:44 AM 6:46 PM
        3. Civil Twilight 6:17 AM 7:13 PM
        4. Nautical Twilight 5:45 AM 7:45PM
        5. Astronomical Twilight 5:12 AM 8:18 PM
        1. Length of Visible Light 12h 56m
        2. Length of Day 12h 1m
        3. Tomorrow will be 2 minutes 43 seconds shorter
        1. Moon 6:10 PM 5:29 AM
        2. Waxing Gibbous99% 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
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