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.
Tonight
73°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 73. Northeast wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Sullivan's Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Chance Showers And Thunderstorms | 6 mph NE | 39% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 3 to 8 mph NE | 42% |
| Sunday Night | 73°F | Partly Cloudy | 1 to 7 mph SE | 13% |
| Monday | 86°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph NE | 15% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph E | 37% |
| Tuesday | 85°F | Showers And Thunderstorms Likely | 3 to 10 mph NE | 67% |
| Tuesday Night | 72°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 7 to 10 mph NE | 67% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 12 to 17 mph NE | 48% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 15 mph NE | 48% |
| Thursday | 81°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 14 to 17 mph N | 23% |
| Thursday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 14 mph N | 23% |
| Friday | 80°F | Sunny | 10 to 14 mph N | 10% |
| Friday Night | 67°F | Partly Cloudy | 7 to 10 mph N | 10% |
| Saturday | 79°F | Mostly Sunny | 12 mph NE | 14% |
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
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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 Sep 20, 2026.