Southport, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Southport, a city in Marion County, Indiana.
This Afternoon
69°F
Slight Chance Light Rain
A slight chance of rain before 4pm. Cloudy. High near 69, with temperatures falling to around 63 in the afternoon. Southwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Southport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Slight Chance Light Rain | 14 mph SW | 18% |
| Tonight | 48°F | Mostly Cloudy | 6 to 12 mph WSW | 5% |
| Thursday | 62°F | Partly Sunny | 7 to 14 mph SW | 0% |
| Thursday Night | 45°F | Slight Chance Light Rain then Mostly Cloudy | 3 to 8 mph W | 15% |
| Friday | 54°F | Mostly Cloudy | 6 to 12 mph NNW | 13% |
| Friday Night | 36°F | Partly Cloudy | 6 to 10 mph NW | 13% |
| Saturday | 53°F | Mostly Sunny | 5 to 8 mph NW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph NW | 0% |
| Sunday | 57°F | Sunny | 2 to 9 mph W | 0% |
| Sunday Night | 34°F | Mostly Clear | 2 to 7 mph W | 0% |
| Monday | 61°F | Sunny | 1 to 8 mph W | 0% |
| Monday Night | 39°F | Clear | 6 mph SW | 0% |
| Tuesday | 63°F | Sunny | 7 mph W | 2% |
| Tuesday Night | 38°F | Mostly Clear | 2 to 6 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Southport (39.660, -86.117). Updated through the day.
Growing snapshot for Southport
Last spring frost
Apr 20
First fall frost
Oct 21
Growing season
183 days
Hardiness zone
6b
More local growing data for Southport: nearby ZIP 46227 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Beech Grove
Crows Nest
Cumberland
Homecroft
Indianapolis city
Lawrence
Meridian Hills
North Crows Nest
Pleasant View
Rocky Ripple
Speedway
Spring Hill
Warren Park
Williams Creek
Wynnedale
Climate data from the nearest NOAA station, Indianapolis Se Side, In (4.5 mi from Southport). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.