Thames River - Harvard Boathouse Weather Forecast
- 42
- 47
Rain
- 26
- 57
Rain
- 32
- 42
Mostly Cloudy
- 22
- 46
Mostly Sunny
- 21
- 33
Partly Sunny
- 29
- 39
Chance Rain/Snow
- 24
- 42
Partly Sunny
Today 18 Dec Northern New London
Sunny. Highs in the upper 40s. South Winds 5 to 10 Mph.
Tonight 18 Dec Northern New London
Mostly cloudy. Rain after midnight. Not as cool with Lows around 40. Temperature rising into the lower 50s after midnight. Southeast Winds 5 to 10 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph after midnight. Chance of rain 90 percent.
Thames River - Harvard Boathouse Temperature Statistics
December Temperature
Groton / New London, Groton / New London Airport (6.2 miles)
Lowest 5 December, 2025
12.9 °FAverage December
31 °FHighest 10 December, 2025
48.9 °F
Climate (2020–Present)
Groton / New London, Groton / New London Airport (6.2 miles)
Average Low 2020–2025
45.5 °FAverage 2020–2025
53.4 °FAverage High 2020–2025
61 °F