South Haven, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Haven, a community in Porter County, Indiana.
Today
77°F
Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers and thunderstorms before noon, then showers and thunderstorms likely. Cloudy, with a high near 77. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for South Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 99% |
| Tonight | 64°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 mph SSE | 89% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 5 to 15 mph NNE | 61% |
| Sunday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 37% |
| Monday | 65°F | Chance Rain Showers | 10 to 15 mph ENE | 36% |
| Monday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 19% |
| Tuesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 21% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NE | 9% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NNE | 7% |
| Thursday | 67°F | Partly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Friday Night | 52°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.