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South Boston, MA Weather Forecast

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South Boston, MA Weather Forecast

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South Boston MA weather - Light Rain - 66°F
Light Rain
66°F
Updated 12:42 am
Feels Like 64°F
Humidity 83%
Wind NNE 8 mph
Barometer  30.03 in
Dew Point 61°F
South Boston MA weather - Light Rain - 19°C
Light Rain
19°C
Updated 12:42 am
Feels Like 18°C
Humidity 83%
Wind NNE 13 km/h
Barometer  101.7 kPa
Dew Point 16°C
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South Boston Weather Forecast

OVERNIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY WEDNESDAY WEDNESDAY NIGHT
South Boston, MA Weather - Overnight Rain South Boston, MA Weather - Friday Chance Of Rain South Boston, MA Weather - Friday Night Rain South Boston, MA Weather - Saturday Rain South Boston, MA Weather - Saturday Night Showers South Boston, MA Weather - Sunday Chance Of Showers South Boston, MA Weather - Sunday Night Chance Of Showers South Boston, MA Weather - Monday Mostly Sunny South Boston, MA Weather - Monday Night Mostly Clear South Boston, MA Weather - Tuesday Mostly Clear South Boston, MA Weather - Wednesday Mostly Clear South Boston, MA Weather - Wednesday Night Partly Cloudy
Rain Chance of Rain Rain Rain Showers Chance of Showers Chance of Showers Mostly Sunny Mostly Clear Mostly Clear Mostly Clear Partly Cloudy
Lo: 65°FLo: 18°C Hi: 71°FHi: 22°C
 Lo: 65°FLo: 18°C Hi: 71°FHi: 22°C
 Lo: 69°FLo: 21°C Hi: 79°FHi: 26°C
 Lo: 65°FLo: 18°C Hi: 81°FHi: 27°C
 Hi: 81°FHi: 27°C
Lo: 61°FLo: 16°C		 Hi: 81°FHi: 27°C
Lo: 61°FLo: 16°C		 Hi: 81°FHi: 27°C
Lo: 61°FLo: 16°C		 Lo: 65°FLo: 18°C
POP: 80% POP: 40% POP: 70% POP: 70% POP: 70% POP: 50% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1002 PM EDT Thu Aug 20 2026 South Boston, MA Weather - WeatherWorld.com

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South Boston Forecast Discussion

Issued: 711 PM EDT Thu Aug 20 2026

Key Messages

  • Rainy conditions develop tonight, tapering off to drizzle or intermittent light rain and onshore flow overnight. Cooler than normal temps Friday with best chances for steady rain in eastern MA.
  • A wet and unusually cool weekend on tap.
  • Drier and warmer next week.

Discussion

... KEY MESSAGE 1...Rainy conditions develop tonight, tapering off to drizzle or intermittent light rain and onshore flow overnight. Cooler than normal temps Friday with best chances for...