Old Lyme, CT Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Old Lyme, CT in one place.
A chance of rain showers between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny. High near 73, with temperatures falling to around 70 in the afternoon. Southwest wind 2 to 8 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Old Lyme, CT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 14, 2026 3:37 AM EDT.
The active forecast window currently covers Apr 15 to Apr 20, 2026 for Old Lyme, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 20, 2026
- Latest sync
- Apr 14, 2026 3:37 AM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Old Lyme
Wednesday looks like the warmest upcoming period in Old Lyme at 73 degrees F.
Sunday Night is the coolest period ahead with temperatures near 40 degrees F.
The strongest winds are forecast for Monday at about 8 to 12 mph W.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 3:37 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- OKX
- Radar station
- KOKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. Southwest wind 2 to 6 mph. Chance of precipitation is 40%.
A chance of rain showers before 8am. Mostly cloudy. High near 72, with temperatures falling to around 67 in the afternoon. Chance of precipitation is 30%.
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 53.
A chance of rain showers. Partly sunny, with a high near 71. Chance of precipitation is 30%.
A chance of rain showers before 8pm. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Partly sunny, with a high near 64.
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 48.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.
A chance of rain showers before 8am. Mostly sunny, with a high near 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Mostly Sunny then Chance Showers And Thunderstorms
|
73°F |
2 to 8 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
54°F |
2 to 6 mph
SW
|
|
Thursday
Apr 16
|
Chance Rain Showers then Mostly Cloudy
|
72°F |
2 to 7 mph
S
|
|
Thursday Night
Apr 16
|
Mostly Cloudy then Slight Chance Rain Showers
|
53°F |
2 to 6 mph
S
|
|
Friday
Apr 17
|
Chance Rain Showers
|
71°F |
2 to 6 mph
SW
|
|
Friday Night
Apr 17
|
Chance Rain Showers then Partly Cloudy
|
51°F |
3 mph
N
|
|
Saturday
Apr 18
|
Partly Sunny
|
64°F |
2 to 7 mph
E
|
|
Saturday Night
Apr 18
|
Mostly Cloudy then Slight Chance Rain Showers
|
48°F |
2 to 6 mph
SE
|
|
Sunday
Apr 19
|
Chance Rain Showers
|
63°F |
3 to 9 mph
S
|
|
Sunday Night
Apr 19
|
Chance Showers And Thunderstorms
|
40°F |
8 mph
W
|
|
Monday
Apr 20
|
Chance Rain Showers then Mostly Sunny
|
54°F |
8 to 12 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Old Lyme.
