Marine Weather Net

South Yarmouth, MA Weather Forecast


Marine Forecast: Nantucket Sound


South Yarmouth, Massachusetts

 Lat: 41.67N, Lon: 70.19W

Current Conditions Updated: 1256 PM EST THU FEB 12 2026

Clear


Temp: 33°F
  • Humidity:
  • 50%
  • Winds:
  • 14 MPH N
  • Gusts:
  • 21 MPH
  • Barometer:
  • 29.8 in.
  • Dewpoint:
  • 17°F
  • Heat index:
  • 33°F

  • Sunrise:
  • 6:41 AM EST
  • Sunset:
  • 5:06 PM EST
  • Moonrise:
  • 3:42 AM EST
  • Moonset:
  • 12:08 PM EST

TONIGHT

PARTLY CLOUDY
Lo: 21°F

FRIDAY

SUNNY

Hi: 35°F
Lo: 21°F

SATURDAY

MOSTLY SUNNY
Hi: 39°F
Lo: 21°F

SUNDAY

MOSTLY SUNNY
Hi: 35°F
Lo: 30°F
Weather Forecast In Detail:
Forecast Issued: 1004 PM EST Thu Feb 12 2026

Overnight...Mostly clear, then becoming partly cloudy. Lows in the lower 20s. Northwest winds 5 to 10 mph with gusts up to 20 mph.
Friday...Sunny. Highs in the mid 30s. Northwest winds 5 to 10 mph. Gusts up to 20 mph in the morning.
Friday Night...Mostly clear in the evening, then mostly cloudy with a chance of flurries after midnight. Lows in the lower 20s. West winds 5 to 10 mph.
Saturday...Mostly sunny with a chance of flurries. Highs in the upper 30s. West winds 5 to 10 mph with gusts up to 20 mph.
Saturday Night...Partly cloudy. Lows in the lower 20s. Northwest winds 5 to 10 mph with gusts up to 20 mph.
Sunday...Mostly sunny. Highs in the mid 30s.
Sunday Night...Mostly cloudy. Near steady temperature in the upper 20s.
Washingtons Birthday And Monday Night...Partly cloudy. Highs in the upper 30s. Lows around 30.
Tuesday...Partly sunny. Highs around 40.
Tuesday Night...Partly cloudy. Near steady temperature in the lower 30s.
Wednesday...Mostly cloudy with a 50 percent chance of rain. Highs in the lower 40s.
Wednesday Night...Rain likely. Near steady temperature in the mid 30s. Chance of rain 60 percent.
Thursday...Mostly cloudy with a 40 percent chance of rain. Highs around 40.
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