Sullivan's Island, SC Weather & Growing Conditions
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. East wind 6 to 9 mph.
7-day forecast
| 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). Updated through the day.
Growing snapshot for Sullivan's Island, SC
Last spring frost
Mar 13
First fall frost
Nov 30
Growing season
262 days
Hardiness zone
9a
Explore more for Sullivan's Island, SC: full frost dates · planting calendar · South Carolina frost dates
Climate data from the nearest NOAA station, Sullivans Is, Sc (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.