‹ Hilton Head Island weather by month
Typical April weather
Hilton Head Island
South Carolina · April
77° days
56° nights
about 4 rainy days · 13 hours of daylight · ocean 68°
What to pack
- Light jacket
- Sunscreen
What April feels like
The RBC Heritage lands at Harbour Town in mid-April and the plaid jackets take over — rentals book out and the bridge onto the island backs up. Around it, this is the loveliest stretch of the year, and at low tide the beach is wide and firm enough to ride a bike straight down.
Expect about 4 days with real rain — enough to notice, not enough to plan around. Humidity stays comfortable; the air never feels heavy.
Can you swim?
The ocean runs about 68° — brisk but swimmable.
The numbers
| Typical high | 77° |
|---|---|
| Typical low | 56° |
| Days with real rain | 4 |
| Total rain | 3.1 in |
| Humidity | comfortable |
| Water temperature | 68° |
| Sunrise / sunset (mid-month) | 6:53 am / 7:52 pm |