Sullivan's Island, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sullivan's Island, a town in Charleston County, South Carolina.
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. East wind 6 to 9 mph.
7-day forecast for Sullivan's Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 6 to 9 mph E | 4% |
| Tonight | 66°F | Mostly Cloudy | 2 to 6 mph SE | 4% |
| Thursday | 79°F | Patchy Fog then Mostly Sunny | 2 to 7 mph S | 5% |
| Thursday Night | 66°F | Partly Cloudy | 3 mph S | 1% |
| Friday | 78°F | Chance Rain Showers | 3 to 9 mph SW | 40% |
| Friday Night | 59°F | Chance Rain Showers then Partly Cloudy | 6 mph W | 40% |
| Saturday | 74°F | Sunny | 7 mph NE | 1% |
| Saturday Night | 53°F | Partly Cloudy | 3 to 9 mph NE | 1% |
| Sunday | 69°F | Mostly Sunny | 5 to 8 mph NE | 1% |
| Sunday Night | 52°F | Partly Cloudy | 6 mph N | 4% |
| Monday | 69°F | Mostly Sunny | 7 mph N | 4% |
| Monday Night | 51°F | Mostly Clear then Slight Chance Rain Showers | 5 mph N | 15% |
| Tuesday | 69°F | Slight Chance Rain Showers then Sunny | 7 mph SE | 15% |
| Tuesday Night | 53°F | Partly Cloudy | 6 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Sullivan's Island (32.771, -79.831). Updated through the day.
Growing snapshot for Sullivan's Island
Last spring frost
Mar 13
First fall frost
Nov 30
Growing season
262 days
Hardiness zone
9a
More local growing data for Sullivan's Island: nearby ZIP 29482 weather · frost dates · planting calendar · South Carolina frost dates
Nearby towns & communities
Adams Run
Awendaw
Charleston
Edisto Beach
Folly Beach
Hollywood
Isle of Palms
James Island
Kiawah Island
Ladson
Lincolnville
McClellanville
Meggett
Mount Pleasant
North Charleston
Ravenel
Rockville
Sangaree
Seabrook Island
All South Carolina locations ›
Climate data from the nearest NOAA station, Sullivans Is, Sc (1.6 mi from Sullivan's Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.