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Onset, MA Weather Forecast
Onset, MA Weather Forecast Date: 102 AM EDT Tue Sep 08 2026
The area/counties/county of: Southern Plymouth County Ma, including the city of Mattapoisett.or toggle through each period.
Rest of Tonight... Partly cloudy. Near steady temperature in the mid 50s. Light and variable winds.
Tuesday... Mostly sunny. Highs in the upper 70s. Northwest winds 5 to 10 mph.
Tuesday Night... Mostly cloudy. Lows in the upper 50s. Southeast winds around 5 mph.
Wednesday... Partly sunny. Highs in the upper 70s. South winds 10 to 15 mph. Gusts up to 25 mph in the afternoon.
Wednesday Night... Partly cloudy. Humid. Near steady temperature in the lower 70s. Southwest winds 15 to 20 mph. Gusts up to 30 mph, increasing to 40 mph after midnight.
Thursday... Partly sunny with a 30% chance of showers. Highs in the mid 80s.
Thursday Night... Mostly cloudy. Lows in the lower 60s.
Friday... Mostly clear. Highs in the mid 70s. Lows in the upper 50s.
Saturday... Mostly clear. Highs in the mid 70s. Lows in the upper 50s.
Saturday Night... Partly cloudy. Lows around 60. Highs in the upper 70s.
Sunday... Partly cloudy. Lows around 60. Highs in the upper 70s.
POP = Probability of Precipitation
Onset Radar Loop
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