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Old Lyme, CT Weather Forecast for 5-Days

Updated: Thu May 21st 2026 12:30 AM EDT

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Old Lyme, CT Weather – 5-21 – Partly Cloudy
63° / 52°
Partly Cloudy
In Old Lyme, it will be cloudy with highs near 63°F and lows around 52°F. Winds will be light at 10mph and gusts of 15.5mph at 4 AM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 81% at 11 PM and 44% being its lowest at 1 PM. Barometric pressure is its highest of 30.29inHg at 10 PM, a lowest point of 30.1inHg at 1 AM with an avg 30.21inHg.
Old Lyme, CT Weather – 5-22 – Sunny
61° / 46°

Weather Tomorrow

Sunny
Daytime highs will reach 61°F with lows dropping to 46°F in Old Lyme, where it will be sunny. Wind will be moderate, blowing around 11mph on average and gusts of 15.2mph at 6 AM. The humidity will be on the higher side, averaging about 65%, the maximum being 88% at 3 AM and 41% being its lowest at 10 AM. Barometric pressure is its highest of 30.38inHg at 8 AM, a lowest point of 30.3inHg at 5 PM with an avg 30.33inHg.
Old Lyme, CT Weather – 5-23 – Scattered Showers
56° / 52°
Scattered Showers
Daytime highs will reach 56°F with lows dropping to 52°F in Old Lyme, where showers likely at times. Rainfall predicted to have a 75% chance with an estimated 0.02in. Winds will be light at 8mph and gusts of 9.4mph at 1 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 88% at 5 AM and 73% being its lowest at 5 PM. Barometric pressure is its highest of 30.44inHg at 11 PM, a lowest point of 30.29inHg at 5 AM with an avg 30.37inHg.
Old Lyme, CT Weather – 5-24 – Overcast
57° / 50°
Overcast
Old Lyme could see cloud-filled skies with daytime highs of 57°F and nighttime lows near 50°F. Wind will be moderate, blowing around 14mph on average and gusts of 17.5mph at 11 PM. The humidity will be on the higher side, averaging about 65%, the maximum being 85% at 2 AM and 50% being its lowest at 5 PM. Barometric pressure is its highest of 30.51inHg at 11 AM, a lowest point of 30.43inHg at 2 AM with an avg 30.48inHg.
Old Lyme, CT Weather – 5-25 – Scattered Showers
61° / 50°
Scattered Showers
Old Lyme could see scattered showers with daytime highs of 61°F and nighttime lows near 50°F. The chance of rain is 86% with an estimated 0.02in. Wind will be moderate, blowing around 14mph on average and gusts of 17.2mph at 12 AM. The humidity will be on the higher side, averaging about 79%, the maximum being 95% at 11 PM and 70% being its lowest at 12 AM. Barometric pressure is its highest of 30.49inHg at 12 AM, a lowest point of 30.32inHg at 11 PM with an avg 30.41inHg.
Old Lyme, CT Weather – 5-26 – Scattered Showers
59° / 56°
Scattered Showers
On and off showers are set to occur in Old Lyme, with a high of 59°F and a low of 56°F. The chance of rain is 82% with an estimated 0.14in. Wind will be moderate, blowing around 13mph on average and gusts of 20.6mph at 2 AM. High humidity with average of 99% is anticipated, the maximum being 100% at 11 AM and 96% being its lowest at 12 AM. Barometric pressure is its highest of 30.29inHg at 12 AM, a lowest point of 30.1inHg at 5 PM with an avg 30.16inHg.

Currently

Partly Cloudy 57°F
30.1 inHg.
Barometer
57%
Humidity
WNW 12.6 mph
Wind
Partly Cloudy

5 Day Forecast Nearby

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