St Helena Island, SC Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for St Helena Island, SC.

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Current conditions are temporarily unavailable for ST HELENA ISLAND, SOUTH CAROLINA. No nearby METAR station found.

5-Day Forecast — St Helena Island, SC

Wednesday

High 78 °F
Mostly Cloudy

Wednesday
Night
Low 62 °F
Smoke

Thursday

High 82 °F
Smoke

Thursday
Night
Low 64 °F
Mostly Clear

Friday

High 80 °F
Mostly Sunny

Friday
Night
Low 66 °F
Mostly Clear

Saturday

High 82 °F
Isolated T-storm

Saturday
Night
Low 66 °F
Isolated T-storm

Sunday

High 80 °F
Chance of T-storms

Detailed Forecast — St Helena Island, SC

Wednesday
Mostly Cloudy. High near 78°F. Wind 7 to 8 mph, with gusts as high as 14 mph.
Wednesday Night
Smoke. Low around 62°F. Wind 5 to 7 mph, with gusts as high as 10 mph.
Thursday
Smoke. High near 82°F. Wind 5 to 9 mph, with gusts as high as 16 mph.
Thursday Night
Mostly Clear. Low around 64°F. Wind 5 to 7 mph, with gusts as high as 15 mph.
Friday
Mostly Sunny. High near 80°F. Wind 5 to 10 mph, with gusts as high as 17 mph.
Friday Night
Mostly Clear. Low around 66°F. Wind 6 to 7 mph, with gusts as high as 15 mph.
Saturday
Isolated T-storm. High near 82°F. Wind 6 to 9 mph, with gusts as high as 16 mph.
Saturday Night
Isolated T-storm. Low around 66°F. Wind 5 to 7 mph, with gusts as high as 16 mph.
Sunday
Chance of Thunderstorms. High near 80°F. Wind 5 to 7 mph, with gusts as high as 12 mph.
Sunday Night
Chance of Showers. Low around 64°F. Wind 3 to 5 mph, with gusts as high as 12 mph.
Monday
Isolated T-storm. High near 78°F. Wind around 9 mph, with gusts as high as 18 mph.
Monday Night
Slight Chance of Rain. Low around 66°F. Wind 5 to 6 mph, with gusts as high as 15 mph.
Tuesday
Chance of Thunderstorms. High near 82°F. Wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday Night
Chance of Showers. Low around 68°F. Wind 5 to 6 mph, with gusts as high as 15 mph.
SC Radar
Current Radar • SC
Day 1 Outlook • April 23, 2026

Observation History — St Helena Island, SC

Time Wind
(mph)
Vis
(mi)
Weather Precip (in) Temperature (F) Relative
Humidity
Wind
Chill
(F)
Heat
Index
(F)
Pressure
Air Dwpt altimeter
(in)
sea level
(mb)

Regional Weather Observation

(KARW)


F

BEAUFORT MCAS (KNBC)

Clear
66.0 F

HILTON HEAD (KHXD)

Clear
68.0 F

WALTERBORO (KRBW)

Clear
64.4 F

CHARLESTON/EXEC (KJZI)

Cloudy
66.2 F

ALLENDALE CNTY (KAQX)

Haze
69.8 F
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