Marine Weather Net

South Yarmouth, MA Weather Forecast


Marine Forecast: Nantucket Sound


South Yarmouth, Massachusetts

 Lat: 41.67N, Lon: 70.19W

Current Conditions Updated: 956 AM EDT MON SEP 7 2026

Clear


Temp: 67°F
  • Humidity:
  • 65%
  • Winds:
  • 15 MPH N
  • Gusts:
  • 22 MPH
  • Barometer:
  • 30.04 in.
  • Dewpoint:
  • 55°F
  • Heat index:
  • 67°F

  • Sunrise:
  • 6:10 AM EDT
  • Sunset:
  • 7:04 PM EDT
  • Moonrise:
  • 1:44 AM EDT
  • Moonset:
  • 5:18 PM EDT

THIS AFTERNOON

SUNNY

Hi: 75°F
Lo: 61°F

TUESDAY

SUNNY

Hi: 75°F
Lo: 61°F

WEDNESDAY

PARTLY SUNNY
Hi: 75°F
Lo: 61°F

FRIDAY

MOSTLY CLEAR
Hi: 71°F
Lo: 61°F
Weather Forecast In Detail:
Forecast Issued: 1004 AM EDT Mon Sep 07 2026

HIGH RIP CURRENT RISK IN EFFECT UNTIL 8 PM EDT THIS EVENING
This Afternoon...Sunny. Highs in the mid 70s. Northwest winds 10 to 15 mph.
Tonight...Mostly clear. Lows in the lower 60s. Southwest winds 5 to 10 mph, becoming northwest after midnight.
Tuesday...Sunny. Highs in the mid 70s. Northwest winds 5 to 10 mph.
Tuesday Night...Mostly cloudy. Lows in the lower 60s. South winds around 5 mph.
Wednesday...Partly sunny. Highs in the mid 70s. South winds 10 to 15 mph. Gusts up to 25 mph in the afternoon.
Wednesday Night And Thursday...Mostly cloudy. Lows in the upper 60s. Highs in the upper 70s.
Thursday Night...Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 40 percent.
Friday...Mostly clear. Highs in the lower 70s. Lows in the lower 60s.
Saturday...Mostly clear. Highs in the lower 70s. Lows in the lower 60s.
Saturday Night And Sunday...Partly cloudy. Lows in the lower 60s. Highs in the mid 70s.
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