Southport, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Southport, a community in Fairfield County, Connecticut.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southeast wind around 5 mph.
7-day forecast for Southport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 64°F | Mostly Cloudy | 3 mph S | 3% |
| Wednesday | 83°F | Partly Sunny | 2 to 6 mph SE | 12% |
| Wednesday Night | 71°F | Slight Chance Rain Showers | 6 mph S | 24% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 3 to 10 mph SW | 32% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 9 mph SW | 30% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph SW | 34% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 6 mph SW | 34% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph SW | 32% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 32% |
| Sunday | 88°F | Mostly Sunny | 3 to 8 mph W | 13% |
| Sunday Night | 72°F | Mostly Clear | 6 mph SW | 10% |
| Monday | 89°F | Sunny | 3 to 10 mph W | 13% |
| Monday Night | 70°F | Slight Chance Rain Showers | 5 to 9 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Southport (41.135, -73.287). Updated through the day.
Growing snapshot for Southport
Last spring frost
Apr 5
First fall frost
Nov 6
Growing season
216 days
Hardiness zone
7a
More local growing data for Southport: nearby ZIP 06890 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
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Bigelow Corners
Bogus Hill
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Candlewood Isle
Candlewood Knolls
Candlewood Lake Club
Candlewood Orchards
Candlewood Shores
Cannondale
Chimney Point
Coleytown
Compo
Cos Cob
Danbury
Daniels Farm
Darien Downtown
Dodgingtown
East Village
Fairfield University
Georgetown
Greens Farms
Greenwich
Hawleyville
Indian Field
Inglenook
Climate data from the nearest NOAA station, Bridgeport Sikorsky Mem Ap, Ct (8.3 mi from Southport). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.