Myrtle Beach, South Carolina Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Myrtle Beach weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 12:50 AM EDT · Open-Meteo
- TodaySep 21Clear13%—84°70°—
- TuesdaySep 22Showers56%0.07″81°72°-3°
- WednesdaySep 23Light Showers50%—82°70°+1°
- ThursdaySep 24Light Drizzle35%0.01″76°64°-6°
- FridaySep 25Overcast——76°58°0°
- SaturdaySep 26Mostly Clear——80°52°+4°
- SundaySep 27Overcast——79°55°-1°
Air quality now AQI 41 · Good
AQI 41 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 35. Overcast through the UV peak window (cloud cover ~74%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35. Overcast through the UV peak window (cloud cover ~74%) — afternoon ozone should stay flat.
- Present
- AQI 35
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:31 PM
- Moonset
- 1:54 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Myrtle Beach at a glance
- Today vs. normal: Today averages 77°F (high 84°F, low 70°F), 5°F above the 72°F normal for Sep 21
- Last frost: March 21 (1991–2020 median, NOAA station 8 km away)
- Microseason: Sep 21–25
- Planting calendar: September — harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Myrtle Beach
- Mon84°70°13%
- Tue81°72°56%
- Wed82°70°50%
- Thu76°64°35%
- Fri76°58°8%
- Sat80°52°1%
- Sun79°55°3%
- Mon81°61°4%
- Tue80°64°7%
- Wed83°65°19%
- Thu87°66°19%
- Fri84°68°20%
- Sat77°73°36%
- Sun78°74°42%
- Mon77°71°42%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Myrtle Beach
Interactive wind and temperature map centered on Myrtle Beach — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 13) is about 8 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: harvest tomatoes, peppers, beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Myrtle Beach
SPC includes Myrtle Beach in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Myrtle Beach
Myrtle Beach sits in Horry County, where the year’s longest day runs 14h 24m of daylight and its shortest just 9h 55m — a swing of +4h 29m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Charleston, the state’s largest city, lies about 88 miles to the SW. The nearest town Myrtle Beach tracks is Wisacky, roughly 81 miles to the WNW.
Air quality in Myrtle Beach
Air quality in Myrtle Beach’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 32). See the full air-quality history for Myrtle Beach.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes | radishes |
| April | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | beans, squash | lettuce, peas, beans, summer squash, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| September | — | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
Myrtle Beach peaks at about 80°F in July and bottoms near 45°F in January; September brings the heaviest rain (6.8 inches) and November the least (3.1 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 45° | 3.4″ |
| February | 47° | 3.8″ |
| March | 53° | 3.7″ |
| April | 61° | 3.4″ |
| May | 69° | 3.8″ |
| June | 76° | 4.8″ |
| July | 80° | 6.6″ |
| August | 78° | 6.3″ |
| September | 74° | 6.8″ |
| October | 65° | 4.1″ |
| November | 54° | 3.1″ |
| December | 47° | 3.8″ |
Regional context
Similar climates Carolina Forest, SC, Forestbrook, SC, Socastee, SC
In Myrtle Beach, NOAA NCEI 1991-2020 normals put January near 45°F and July near 80°F — a 35°F seasonal arc — with about 53.6 inches of precipitation.
Myrtle Beach's rain peaks in summer: September brings 6.8 inches, while November sees just 3.1 inches under cooler, drier air. That puts Myrtle Beach in a summer-convective cohort with places like Carolina Forest, SC, Forestbrook, SC and Socastee, SC.
Once Myrtle Beach passes March 21, freezes fade and Myrtle Beach's beds take peas, lettuce, spinach, and radishes. Myrtle Beach's heat-lovers — tomatoes, peppers, squash — hold off until Myrtle Beach's frost risk clears, 10-14 days on. The season ends by November 13 in Myrtle Beach, once hard frosts set back in. Open lawns in Myrtle Beach whiten first when frost returns.
Similar climates: Carolina Forest, SC, Forestbrook, SC, Socastee, SC, Red Hill, SC, Surfside Beach, SC.
Frequently asked
- When does it freeze in Myrtle Beach?
- Myrtle Beach's last spring frost lands near March 21, and in Myrtle Beach the first fall frost follows around November 13.
- What is the rainy season in Myrtle Beach?
- Myrtle Beach sees its heaviest rain in September (around 6.8 inches), part of roughly 54 inches a year.
- What is the warmest month in Myrtle Beach?
- The warmest stretch in Myrtle Beach comes in July, around 80°F on average.
- What is the coldest month in Myrtle Beach?
- On average January is the chilliest month in Myrtle Beach, about 45°F.
- When can I start a vegetable garden in Myrtle Beach?
- Myrtle Beach's last frost (March 21) cues hardy greens; in Myrtle Beach, hold heat-lovers two weeks past.
- What hardiness zone is Myrtle Beach?
- Myrtle Beach's USDA zone comes from its January mean (45°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Myrtle Beach?
- Myrtle Beach's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Myrtle Beach?
- See this week's day-by-day rain chances for Myrtle Beach in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Myrtle Beach?
- Current conditions for Myrtle Beach and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Myrtle Beach forecast updated?
- The Myrtle Beach forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Myrtle Beach?
- Today's sunrise and sunset times for Myrtle Beach are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Myrtle Beach?
- The next few days in Myrtle Beach's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Myrtle Beach sits at 33.7°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Myrtle Beach
- 29572
- 29575
- 29577
- 29578
- 29579
- 29588