Click on a day for an hourly weather forecast
The weather in Hilton Head Island in August is very hot. The average temperatures are between 26°C and 31°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of August in Hilton Head Island. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Hilton Head Island in August 2025.
If you’re planning to visit Hilton Head Island in the near future, we highly recommend that you review the 14 day weather forecast for Hilton Head Island before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 9° | 5 | 26 | 0 | 91 mm | Good | Hilton Head Island in January |
| February | 16° / 10° | 5 | 23 | 0 | 105 mm | Good | Hilton Head Island in February |
| March | 19° / 13° | 5 | 26 | 0 | 114 mm | Good | Hilton Head Island in March |
| April | 23° / 17° | 6 | 24 | 0 | 138 mm | Perfect | Hilton Head Island in April |
| May | 26° / 21° | 8 | 23 | 0 | 151 mm | Good | Hilton Head Island in May |
| June | 30° / 24° | 11 | 19 | 0 | 225 mm | Ok | Hilton Head Island in June |
| July | 31° / 26° | 13 | 18 | 0 | 246 mm | Ok | Hilton Head Island in July |
| August | 31° / 26° | 14 | 17 | 0 | 309 mm | Ok | Hilton Head Island in August |
| September | 29° / 24° | 8 | 22 | 0 | 201 mm | Ok | Hilton Head Island in September |
| October | 25° / 19° | 3 | 28 | 0 | 121 mm | Perfect | Hilton Head Island in October |
| November | 20° / 14° | 4 | 26 | 0 | 75 mm | Good | Hilton Head Island in November |
| December | 17° / 12° | 6 | 25 | 0 | 119 mm | Good | Hilton Head Island in December |