Weather for Old Mystic, Connecticut
Current Weather
66°F
Conditions: Partly Cloudy
Humidity: 61%
Feels Like: 66°F
Wind: E 7.2 mph
Wind Gusts: 13.3 mph
Humidity: 61%
Feels Like: 66°F
Wind: E 7.2 mph
Wind Gusts: 13.3 mph
Pressure: 30.15 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0
Five Day Weather Forecast
Wed
H: 69°F
L: 62°F
Thu
H: 66°F
L: 61°F
Fri
H: 80°F
L: 61°F
Sat
H: 76°F
L: 65°F
Sun
H: 75°F
L: 67°F
Air Quality
PM2.5:
31.82 μg/m3
PM10:
38.11 μg/m3
Carbon Monoxide: 318.2 μg/m3
Nitrogen Dioxide: 2.96 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 90 μg/m3
Nitrogen Dioxide: 2.96 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 90 μg/m3
Astronomical
Sunrise: 6:02 AM
Sun Transit: 12:51 AM
Sunset: 7:39 PM
Daylight: 13 hrs 37 mins
Sun Transit: 12:51 AM
Sunset: 7:39 PM
Daylight: 13 hrs 37 mins
Moonrise: 2:42 AM
Moon Transit: 10:42 AM
Moonset: 6:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%
Moon Transit: 10:42 AM
Moonset: 6:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%
Best Times for Fishing or Hunting
Major Periods
12:13 AM - 2:43 AM10:12 AM - 12:42 AM
Minor Periods
6:03 PM - 7:33 PM2:12 AM - 3:42 AM
Action Rating: 3 out of 5
High Surf Advisory issued August 20 at 2:16AM EDT until August 23 at 8:00AM EDT by NWS Boston/Norton MA
Effective: Wed August 20, 2025, 2:16 AM
Expires: Wed August 20, 2025, 4:00 PM
* WHAT...Large breaking waves increasing each day, peaking Friday with waves of 8 to 13 feet expected in the surf zone. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI. * WHEN...Until 8 AM EDT Saturday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion.
Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
High Surf Advisory issued August 20 at 2:16AM EDT until August 23 at 8:00AM EDT by NWS Boston/Norton MA
Effective: Wed August 20, 2025, 2:16 AM
Expires: Wed August 20, 2025, 4:00 PM
* WHAT...Large breaking waves increasing each day, peaking Friday with waves of 6 to 10 feet expected in the surf zone. * WHERE...In Massachusetts, Southern Bristol MA County. In Rhode Island, Washington RI and Newport RI Counties. * WHEN...Until 8 AM EDT Saturday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion.
Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
Wednesday, August 20, 2025
Weather Forecast
Conditions: Moderate rain
Average Temperature: 65.3°F
Average Humidity: 84%
Average Temperature: 65.3°F
Average Humidity: 84%
Chance of Rain: 79%
Wind: 16.8 mph
UV Index: 1.2
Wind: 16.8 mph
UV Index: 1.2
Air Quality
AQI:
2 - Moderate
PM2.5:
24.65 μg/m3
PM10:
29.89 μg/m3
Carbon Monoxide: 296 μg/m3
Nitrogen Dioxide: 3.26 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 87.28 μg/m3
Nitrogen Dioxide: 3.26 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 87.28 μg/m3
Astronomical
Sunrise: 6:02 AM
Sun Transit: 12:51 AM
Sunset: 7:39 PM
Daylight: 13 hrs 37 mins
Sun Transit: 12:51 AM
Sunset: 7:39 PM
Daylight: 13 hrs 37 mins
Moonrise: 2:42 AM
Moon Transit: 10:42 AM
Moonset: 6:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%
Moon Transit: 10:42 AM
Moonset: 6:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%
Best Times for Fishing or Hunting
Major Periods
12:13 AM - 2:43 AM10:12 AM - 12:42 AM
Minor Periods
6:03 PM - 7:33 PM2:12 AM - 3:42 AM
Action Rating: 3 out of 5
Thursday, August 21, 2025
Weather Forecast
Conditions: Overcast
Average Temperature: 63°F
Average Humidity: 90%
Average Temperature: 63°F
Average Humidity: 90%
Chance of Rain: 0%
Wind: 20.1 mph
UV Index: 1
Wind: 20.1 mph
UV Index: 1
Air Quality
AQI:
1 - Good
PM2.5:
11.03 μg/m3
PM10:
14.02 μg/m3
Carbon Monoxide: 285.64 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 91.6 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 91.6 μg/m3
Astronomical
Sunrise: 6:03 AM
Sun Transit: 12:50 AM
Sunset: 7:38 PM
Daylight: 13 hrs 34 mins
Sun Transit: 12:50 AM
Sunset: 7:38 PM
Daylight: 13 hrs 34 mins
Moonrise: 3:56 AM
Moon Transit: 11:37 AM
Moonset: 7:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.2%
Moon Transit: 11:37 AM
Moonset: 7:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.2%
Best Times for Fishing or Hunting
Major Periods
1:10 AM - 3:40 AM11:07 AM - 1:37 PM
Minor Periods
6:35 PM - 8:05 PM3:26 AM - 4:56 AM
Action Rating: 3 out of 5
Friday, August 22, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 69.3°F
Average Humidity: 66%
Average Temperature: 69.3°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 17.4 mph
UV Index: 2.1
Wind: 17.4 mph
UV Index: 2.1
Air Quality
AQI:
1 - Good
PM2.5:
11.51 μg/m3
PM10:
14.03 μg/m3
Carbon Monoxide: 306.58 μg/m3
Nitrogen Dioxide: 7.02 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 87.44 μg/m3
Nitrogen Dioxide: 7.02 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 87.44 μg/m3
Astronomical
Sunrise: 6:04 AM
Sun Transit: 12:50 AM
Sunset: 7:36 PM
Daylight: 13 hrs 32 mins
Sun Transit: 12:50 AM
Sunset: 7:36 PM
Daylight: 13 hrs 32 mins
Moonrise: 5:09 AM
Moon Transit: 12:27 AM
Moonset: 7:32 PM
Moon Phase: New
Moon Illumination: 0.0%
Moon Transit: 12:27 AM
Moonset: 7:32 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
2:02 AM - 4:32 AM11:57 AM - 2:27 PM
Minor Periods
7:02 PM - 8:32 PM4:39 AM - 6:09 AM
Action Rating: 4 out of 5
Saturday, August 23, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 70.7°F
Average Humidity: 70%
Average Temperature: 70.7°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 14.5 mph
UV Index: 2
Wind: 14.5 mph
UV Index: 2
Air Quality
AQI:
2 - Moderate
PM2.5:
16.76 μg/m3
PM10:
17.19 μg/m3
Carbon Monoxide: 357.48 μg/m3
Nitrogen Dioxide: 17.85 μg/m3
Sulphur Dioxide: 3.06 μg/m3
Ozone: 74.23 μg/m3
Nitrogen Dioxide: 17.85 μg/m3
Sulphur Dioxide: 3.06 μg/m3
Ozone: 74.23 μg/m3
Astronomical
Sunrise: 6:05 AM
Sun Transit: 12:50 AM
Sunset: 7:34 PM
Daylight: 13 hrs 29 mins
Sun Transit: 12:50 AM
Sunset: 7:34 PM
Daylight: 13 hrs 29 mins
Moonrise: 6:19 AM
Moon Transit: 1:13 PM
Moonset: 7:55 PM
Moon Phase: New
Moon Illumination: 1.4%
Moon Transit: 1:13 PM
Moonset: 7:55 PM
Moon Phase: New
Moon Illumination: 1.4%
Best Times for Fishing or Hunting
Major Periods
2:49 AM - 5:19 AM12:43 AM - 3:13 PM
Minor Periods
7:25 PM - 8:55 PM5:49 AM - 7:19 AM
Action Rating: 5 out of 5
Sunday, August 24, 2025
Weather Forecast
Conditions: Patchy rain nearby
Average Temperature: 70.2°F
Average Humidity: 79%
Average Temperature: 70.2°F
Average Humidity: 79%
Chance of Rain: 88%
Wind: 13.4 mph
UV Index: 0.1
Wind: 13.4 mph
UV Index: 0.1
Air Quality
AQI:
0 -
PM2.5:
0 μg/m3
PM10:
0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sunrise: 6:06 AM
Sun Transit: 12:50 AM
Sunset: 7:33 PM
Daylight: 13 hrs 26 mins
Sun Transit: 12:50 AM
Sunset: 7:33 PM
Daylight: 13 hrs 26 mins
Moonrise: 7:25 AM
Moon Transit: 1:55 PM
Moonset: 8:15 PM
Moon Phase: New
Moon Illumination: 0.1%
Moon Transit: 1:55 PM
Moonset: 8:15 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
3:33 AM - 6:03 AM1:25 PM - 3:55 PM
Minor Periods
7:45 PM - 9:15 PM6:55 AM - 8:25 AM
Action Rating: 5 out of 5
The times presented here are based upon the solunar theory, which is the idea that the movements of
fish and other animals are affected by the location of the sun and moon. The major periods are
believed to be the times of the greatest animal activity and occur when the moon is directly
overhead or underfoot (lunar transits). The minor periods also see increased activity and
occur when the moon is rising or setting. The strongest activity occurs during full or new moons,
and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.