Sullivans Island, SC Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivans Island, SC in one place.
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 5pm. Partly sunny, with a high near 82. Northeast wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Sullivans Island, SC is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 19, 2026 5:37 PM EDT.
The active forecast window currently covers Sep 20 to Sep 25, 2026 for Sullivans Island, SC.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 20 to Sep 25, 2026
- Latest sync
- Sep 19, 2026 5:37 PM EDT
- Forecast office
- CHS
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivans Island
Monday looks like the warmest upcoming period in Sullivans Island at 83 degrees F.
Thursday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Wednesday at about 13 to 18 mph NE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 19, 2026 5:37 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- CHS
- Radar station
- KCLX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 77. Southeast wind 2 to 8 mph. New rainfall amounts less than a tenth of an inch possible.
Mostly sunny, with a high near 83. Northeast wind 3 to 9 mph.
A slight chance of showers and thunderstorms between 8pm and 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Chance of precipitation is 40%.
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 70%.
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
Sunny, with a high near 79.
Partly cloudy, with a low around 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
82°F |
5 to 9 mph
NE
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
77°F |
2 to 8 mph
SE
|
|
Monday
Sep 21
|
Mostly Sunny
|
83°F |
3 to 9 mph
NE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms
|
77°F |
3 to 8 mph
E
|
|
Tuesday
Sep 22
|
Showers And Thunderstorms Likely
|
82°F |
6 to 12 mph
NE
|
|
Tuesday Night
Sep 22
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
74°F |
8 to 12 mph
NE
|
|
Wednesday
Sep 23
|
Chance Showers And Thunderstorms
|
82°F |
13 to 18 mph
NE
|
|
Wednesday Night
Sep 23
|
Chance Showers And Thunderstorms
|
71°F |
17 mph
NE
|
|
Thursday
Sep 24
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
80°F |
18 mph
N
|
|
Thursday Night
Sep 24
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
69°F |
16 mph
N
|
|
Friday
Sep 25
|
Sunny
|
79°F |
15 mph
N
|
|
Friday Night
Sep 25
|
Partly Cloudy
|
69°F |
8 to 12 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivans Island.