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

66°F

Slight Chance Rain Showers

A slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 66, with temperatures falling to around 58 in the afternoon. West southwest wind around 15 mph, with gusts as high as 25 mph.

7-day forecast for South Haven

When	Temp	Forecast	Wind	Precip
This Afternoon	66°F	Slight Chance Rain Showers	15 mph WSW	1%
Tonight	47°F	Slight Chance Rain Showers then Slight Chance Rain	10 to 15 mph SW	17%
Thursday	55°F	Mostly Cloudy then Chance Rain	10 to 15 mph SW	43%
Thursday Night	40°F	Rain	10 mph NW	88%
Friday	50°F	Chance Rain	10 to 15 mph NNW	41%
Friday Night	37°F	Mostly Cloudy	5 to 10 mph NNW	12%
Saturday	50°F	Mostly Sunny	5 to 10 mph NW	4%
Saturday Night	34°F	Mostly Clear	0 to 5 mph W	0%
Sunday	56°F	Sunny	5 to 10 mph W	1%
Sunday Night	36°F	Mostly Clear	5 mph W	0%
Monday	60°F	Sunny	5 to 10 mph SW	0%
Monday Night	40°F	Mostly Clear	5 mph SW	0%
Tuesday	60°F	Sunny	5 mph W	1%
Tuesday Night	39°F	Partly Cloudy	0 mph	2%

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

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

All Indiana locations ›

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 Nov 4, 2026.