10-Day Weather Forecast - Saint Helena Island, SC

Patchy fog in the morning. Mostly sunny. Highs around 90. Heat index values up to 105. Northeast winds 5 to 10 mph, becoming east 10 to 15 mph in the afternoon.

Mostly clear. Lows in the upper 70s. Southeast winds 5 to 10 mph.

Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Southeast winds 5 to 10 mph. Chance of rain 20 percent.

Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. South winds 5 to 10 mph.

Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 110.

Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent.

Showers and thunderstorms likely. Highs around 90. Chance of rain 70 percent. Heat index values up to 105.

Showers likely with a chance of thunderstorms. Lows in the mid 70s. Chance of rain 70 percent.

Showers likely with a chance of thunderstorms. Highs in the mid 80s. Chance of rain 70 percent.

Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 50 percent.

Mostly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the mid 80s. Chance of rain 40 percent.

Partly cloudy. Lows in the mid 70s.

Mostly sunny with a 20 percent chance of showers. Highs in the upper 80s.

Clear with widely scattered thunderstorms. Chance of storms 30%. Low temperature around 78F. Dew point will be around 74F with an average humidity of 82%. Winds will be 2 mph from the E.

Mostly sunny with widely scattered thunderstorms. Chance of storms 25%. High temperature around 83F. Dew point will be around 74F with an average humidity of 83%. Winds will be 3 mph from the SE.

Mostly clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 78F. Dew point will be around 74F with an average humidity of 82%. Winds will be 2 mph from the SE.

Sunny with widely scattered thunderstorms. Chance of storms 25%. High temperature around 84F. Dew point will be around 74F with an average humidity of 82%. Winds will be 2 mph from the SE.

Clear with a 25% chance for rain and thunderstorms. Low temperature around 79F. Dew point will be around 74F with an average humidity of 80%. Winds will be 2 mph from the SE.