Hilton Head Island Weather in May
Thinking of visiting Hilton Head Island in May? Expect high temperatures reaching 27°C (81°F) during the day, dropping to 19°C (66°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Hilton Head Island in May
Past climate data indicates that roughly 9 days will see rain, totalling around 76 mm (3 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Hilton Head Island in May
May is a good time to be in Hilton Head Island. Days are perfect, reaching 27°C (81°F), with nights around 19°C (66°F). Overall, the month follows a fairly predictable daily temperature pattern. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Hilton Head Island in May
With approximately 280 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Average water temperature in May
At 23°C (73°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Hilton Head Island's climate page.
Hilton Head Island Temperature in May
Min Temperature
19°C (66°F)
Max Temperature
27°C (81°F)
Water Temperature
23°C (73°F)
Chance of Rain
30%
Precipitation
76 mm (3 in)
Rainy days
9 days
Sunshine
280 hours
Percentage Sunshine
64%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hilton Head Island typically stay consistent throughout May, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows typically ranging from 16°C (61°F) to 20°C (68°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Hilton Head Island in May
Browse day-by-day weather records for Hilton Head Island spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hilton Head Island historical weather extremes in May
The extremes listed below come from historical weather data collected in Hilton Head Island from 1976 through 2026.
- The warmest day in May was on May 27, 2019, with a maximum of 38°C (100°F).
- The lowest daytime temperature in May was 12°C (54°F), recorded on May 7, 1992.
- The lowest overnight temperature recorded in May was 6°C (43°F) (May 8, 1989).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Hilton Head Island in May
Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 23°C (73°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Hilton Head Island in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Hilton Head Island's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Hilton Head Island climate overview or explore weather in the United States of America.
