Weather for Old Mystic, Connecticut
Current Weather
Humidity: 78%
Feels Like: 64.9°F
Wind: NE 14.5 mph
Wind Gusts: 19.2 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.4
Five Day Weather Forecast
Wed
H: 69°F
L: 62°F
Thu
H: 79°F
L: 60°F
Fri
H: 69°F
L: 64°F
Sat
H: 69°F
L: 60°F
Sun
H: 73°F
L: 62°F
Air Quality
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 90 μg/m3
Astronomical
Sun Transit: 12:44 AM
Sunset: 7:05 PM
Daylight: 12 hrs 41 mins
Moon Transit: 2:46 AM
Moonset: 9:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%
Best Times for Fishing or Hunting
Major Periods
2:16 AM - 4:46 AM5:11 PM - 7:41 PM
Minor Periods
7:56 PM - 9:26 PM9:17 AM - 10:47 AM
Action Rating: 2 out of 5
Coastal Flood Statement issued September 10 at 4:03AM EDT until September 10 at 1:00PM EDT by NWS Upton NY
Effective: Wed September 10, 2025, 4:03 AM
Expires: Wed September 10, 2025, 1:00 PM
* WHAT...For the High Rip Current Risk, dangerous rip currents expected. For the Coastal Flood Statement, up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southwest Suffolk County. * WHEN...For the High Rip Current Risk, through this evening. For the Coastal Flood Statement, from 7 AM this morning to 1 PM EDT this afternoon. * COASTAL FLOOD IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. * RIP CURRENT IMPACTS...Life threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.
Do not drive through flooded roadways. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.
Coastal Flood Statement issued September 10 at 4:03AM EDT until September 10 at 4:00PM EDT by NWS Upton NY
Effective: Wed September 10, 2025, 4:03 AM
Expires: Wed September 10, 2025, 1:00 PM
* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Northwest Suffolk and Northern Nassau Counties. * WHEN...From 10 AM EDT this morning through this afternoon. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline.
Do not drive through flooded roadways.
Rip Current Statement issued September 10 at 4:03AM EDT until September 10 at 9:00PM EDT by NWS Upton NY
Effective: Wed September 10, 2025, 4:03 AM
Expires: Wed September 10, 2025, 1:00 PM
* WHAT...Dangerous rip currents expected. * WHERE...Kings (Brooklyn) and Southeast Suffolk Counties. * WHEN...Through this evening. * IMPACTS...Life threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.
If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.
Rip Current Statement issued September 10 at 4:03AM EDT until September 10 at 9:00PM EDT by NWS Upton NY
Effective: Wed September 10, 2025, 4:03 AM
Expires: Wed September 10, 2025, 1:00 PM
* WHAT...For the High Rip Current Risk, dangerous rip currents expected. For the Coastal Flood Statement, up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southwest Suffolk County. * WHEN...For the High Rip Current Risk, through this evening. For the Coastal Flood Statement, from 7 AM this morning to 1 PM EDT this afternoon. * COASTAL FLOOD IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. * RIP CURRENT IMPACTS...Life threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.
Do not drive through flooded roadways. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.
Weather Forecast
Average Temperature: 65.1°F
Average Humidity: 87%
Wind: 14.8 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 7.53 μg/m3
Sulphur Dioxide: 1.89 μg/m3
Ozone: 78.8 μg/m3
Astronomical
Sun Transit: 12:44 AM
Sunset: 7:05 PM
Daylight: 12 hrs 41 mins
Moon Transit: 2:46 AM
Moonset: 9:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%
Best Times for Fishing or Hunting
Major Periods
2:16 AM - 4:46 AM5:11 PM - 7:41 PM
Minor Periods
7:56 PM - 9:26 PM9:17 AM - 10:47 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 69.4°F
Average Humidity: 69%
Wind: 9.4 mph
UV Index: 1.5
Air Quality
Nitrogen Dioxide: 16.04 μg/m3
Sulphur Dioxide: 2.46 μg/m3
Ozone: 98.36 μg/m3
Astronomical
Sun Transit: 12:44 AM
Sunset: 7:03 PM
Daylight: 12 hrs 39 mins
Moon Transit: 3:38 AM
Moonset: 11:07 AM
Moon Phase: Waning Gibbous
Moon Illumination: 77.5%
Best Times for Fishing or Hunting
Major Periods
3:08 AM - 5:38 AM6:06 PM - 8:36 PM
Minor Periods
8:28 PM - 9:58 PM10:37 AM - 12:07 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 66.5°F
Average Humidity: 63%
Wind: 11.6 mph
UV Index: 1.5
Air Quality
Nitrogen Dioxide: 19.02 μg/m3
Sulphur Dioxide: 2.23 μg/m3
Ozone: 85.52 μg/m3
Astronomical
Sun Transit: 12:43 AM
Sunset: 7:02 PM
Daylight: 12 hrs 36 mins
Moon Transit: 4:35 AM
Moonset: 12:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 67.4%
Best Times for Fishing or Hunting
Major Periods
4:05 AM - 6:35 AM7:04 PM - 9:34 PM
Minor Periods
9:06 PM - 10:36 PM11:56 AM - 1:26 PM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 63.8°F
Average Humidity: 64%
Wind: 10.3 mph
UV Index: 1.4
Air Quality
Nitrogen Dioxide: 5.85 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 80.4 μg/m3
Astronomical
Sun Transit: 12:43 AM
Sunset: 7:00 PM
Daylight: 12 hrs 33 mins
Moon Transit: 5:34 AM
Moonset: 1:42 PM
Moon Phase: Waning Gibbous
Moon Illumination: 56.4%
Best Times for Fishing or Hunting
Major Periods
5:04 AM - 7:34 AM8:05 PM - 10:35 PM
Minor Periods
9:55 PM - 11:25 PM1:12 PM - 2:42 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 66.8°F
Average Humidity: 83%
Wind: 12.1 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 7.4 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 69.62 μg/m3
Astronomical
Sun Transit: 12:43 AM
Sunset: 6:58 PM
Daylight: 12 hrs 31 mins
Moon Transit: 6:36 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 45.1%
Best Times for Fishing or Hunting
Major Periods
6:06 AM - 8:36 AM9:07 PM - 11:37 PM
Minor Periods
12:00 AM - 12:00 AM2:21 PM - 3:51 PM
Action Rating: 3 out of 5