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
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm. Mostly sunny, with a high near 87. Southeast wind 5 to 13 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sullivan's Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 5 to 13 mph SE | 26% |
| Tonight | 77°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 to 13 mph S | 54% |
| Wednesday | 87°F | Showers And Thunderstorms then Partly Sunny | 6 to 13 mph S | 75% |
| Wednesday Night | 78°F | Chance Showers And Thunderstorms | 7 to 12 mph S | 53% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 53% |
| Thursday Night | 78°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 9 mph S | 21% |
| Friday | 88°F | Chance Showers And Thunderstorms | 5 to 12 mph SE | 41% |
| Friday Night | 78°F | Chance Showers And Thunderstorms | 6 to 10 mph SE | 32% |
| Saturday | 86°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 57% |
| Saturday Night | 78°F | Chance Showers And Thunderstorms | 5 to 9 mph S | 32% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 3 to 10 mph SW | 44% |
| Sunday Night | 79°F | Chance Showers And Thunderstorms | 6 to 10 mph SW | 29% |
| Monday | 88°F | Chance Showers And Thunderstorms | 5 to 12 mph SW | 34% |
| Monday Night | 79°F | Chance Showers And Thunderstorms | 7 to 12 mph SW | 30% |
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
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Mount Pleasant
North Charleston
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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 Aug 4, 2026.