South Haven, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Haven, a community in Porter County, Indiana.
This Afternoon
72°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy, with a high near 72. West northwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for South Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Showers And Thunderstorms | 5 mph WNW | 27% |
| Tonight | 66°F | Showers And Thunderstorms | 0 to 5 mph ESE | 90% |
| Sunday | 70°F | Showers And Thunderstorms | 5 to 15 mph NNE | 81% |
| Sunday Night | 53°F | Chance Rain Showers | 10 mph NE | 49% |
| Monday | 65°F | Chance Rain Showers | 10 to 15 mph ENE | 33% |
| Monday Night | 51°F | Chance Rain Showers | 10 mph ENE | 33% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 26% |
| Tuesday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 26% |
| Wednesday | 64°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NE | 10% |
| Thursday | 67°F | Partly Sunny | 5 mph NE | 2% |
| Thursday Night | 53°F | Mostly Cloudy | 0 to 5 mph NE | 8% |
| Friday | 71°F | Partly Sunny | 0 to 5 mph NE | 8% |
| Friday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for South Haven (41.539, -87.140). Updated through the day.
Growing snapshot for South Haven
Last spring frost
Apr 22
First fall frost
Oct 25
Growing season
185 days
Hardiness zone
6a
More local growing data for South Haven: nearby ZIP 46393 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Aberdeen
Beverly Shores
Boone Grove
Burns Harbor
Chesterton
Dune Acres
Hebron
Kouts
Lake Eliza
Lakes of the Four Seasons
Malden
Ogden Dunes
Portage
Porter
Salt Creek Commons
Shorewood Forest
Town of Pines
Valparaiso
Wheeler
Climate data from the nearest NOAA station, Valparaiso Wtr Wks, In (6.7 mi from South Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.