South Boston, MA Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for South Boston, MA in one place.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. South wind 5 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for South Boston, MA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 17, 2026 3:00 AM EDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for South Boston, MA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 3:00 AM EDT
- Forecast office
- BOX
- Source
- NOAA / NWS
Daily Outlook
This Week in South Boston
Sunday looks like the warmest upcoming period in South Boston at 86 degrees F.
Sunday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph S.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 3:00 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- BOX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
A chance of rain showers before 8am. Mostly sunny, with a high near 86. West wind around 10 mph. Chance of precipitation is 40%.
Mostly clear, with a low around 61. Northwest wind 2 to 7 mph.
Sunny, with a high near 82. West wind 1 to 9 mph.
Partly cloudy, with a low around 64. South wind 2 to 8 mph.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. South wind 2 to 12 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 68. Southwest wind 6 to 10 mph. Chance of precipitation is 70%.
Rain showers likely before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 81. Southwest wind 8 to 12 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Southwest wind 3 to 8 mph. Chance of precipitation is 60%.
A chance of rain showers. Mostly sunny, with a high near 81. West wind 3 to 7 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Mostly Sunny then Chance Showers And Thunderstorms
|
84°F |
5 to 15 mph
S
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms
|
69°F |
9 to 14 mph
SW
|
|
Sunday
Jul 19
|
Chance Rain Showers then Mostly Sunny
|
86°F |
10 mph
W
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
61°F |
2 to 7 mph
NW
|
|
Monday
Jul 20
|
Sunny
|
82°F |
1 to 9 mph
W
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
64°F |
2 to 8 mph
S
|
|
Tuesday
Jul 21
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
82°F |
2 to 12 mph
S
|
|
Tuesday Night
Jul 21
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
68°F |
6 to 10 mph
SW
|
|
Wednesday
Jul 22
|
Rain Showers Likely
|
81°F |
8 to 12 mph
SW
|
|
Wednesday Night
Jul 22
|
Showers And Thunderstorms Likely
|
64°F |
3 to 8 mph
SW
|
|
Thursday
Jul 23
|
Chance Rain Showers
|
81°F |
3 to 7 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around South Boston.
