Swansea, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swansea, a town in Lexington County, South Carolina.
Today
90°F
Patchy Fog then Chance Showers And Thunderstorms
Patchy fog before 9am, then a chance of showers and thunderstorms. Partly sunny, with a high near 90. Heat index values as high as 100. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Swansea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Patchy Fog then Chance Showers And Thunderstorms | 0 to 5 mph SE | 50% |
| Tonight | 70°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 56% |
| Wednesday | 91°F | Patchy Fog then Chance Showers And Thunderstorms | 1 to 8 mph SE | 49% |
| Wednesday Night | 71°F | Showers And Thunderstorms Likely | 2 to 7 mph S | 58% |
| Thursday | 92°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 6 mph S | 67% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 67% |
| Friday | 93°F | Chance Showers And Thunderstorms | 0 to 7 mph S | 36% |
| Friday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 6 mph S | 36% |
| Saturday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph SE | 30% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph S | 30% |
| Sunday | 93°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 5 mph SW | 38% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 38% |
| Monday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph SW | 33% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 33% |
Forecast source: National Weather Service (api.weather.gov) for Swansea (33.740, -81.105). Updated through the day.
Growing snapshot for Swansea
Last spring frost
Mar 26
First fall frost
Nov 6
Growing season
227 days
Hardiness zone
8b
More local growing data for Swansea: nearby ZIP 29160 weather · frost dates · planting calendar · South Carolina frost dates
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All South Carolina locations ›
Climate data from the nearest NOAA station, N 5Ne, Sc (5.8 mi from Swansea). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.