Marine Weather Net

Chatham, MA Weather Forecast


Marine Forecast: Nantucket Sound


Chatham, Massachusetts

 Lat: 41.68N, Lon: 69.96W

Current Conditions Updated: 1152 PM EDT SAT MAR 14 2026

Clear


Temp: 36°F
  • Humidity:
  • 54%
  • Winds:
  • 12 MPH WNW
  • Gusts:
  • 20 MPH
  • Barometer:
  • 30.25 in.
  • Dewpoint:
  • 21°F
  • Heat index:
  • 36°F

  • Sunrise:
  • 6:50 AM EDT
  • Sunset:
  • 6:45 PM EDT
  • Moonrise:
  • 5:17 AM EDT
  • Moonset:
  • 3:07 PM EDT

TONIGHT

MOSTLY CLEAR
Lo: 29°F

SUNDAY

MOSTLY SUNNY
Hi: 41°F
Lo: 35°F

MONDAY

SHOWERS
Hi: 55°F
Lo: 35°F
Precip: 100%

TUESDAY

PARTLY SUNNY
Hi: 45°F
Lo: 31°F
Precip: 50%
Weather Forecast In Detail:
Forecast Issued: 1005 PM EDT Sat Mar 14 2026

HIGH WIND WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY NIGHT
Overnight...Mostly clear. Lows in the upper 20s. West winds 10 to 15 mph with gusts up to 30 mph.
Sunday...Mostly sunny. Highs in the lower 40s. North winds 5 to 10 mph with gusts up to 20 mph, becoming southeast in the afternoon.
Sunday Night...Mostly cloudy. A chance of rain showers after midnight. Lows in the mid 30s. Southeast winds 10 to 15 mph. Gusts up to 20 mph, increasing to 30 mph after midnight. Chance of rain 50 percent.
Monday...Showers. Not as cool with highs in the mid 50s. South winds 15 to 20 mph with gusts up to 40 mph. Chance of rain near 100 percent.
Monday Night...Showers, breezy with lows in the mid 30s. South winds 15 to 25 mph with gusts up to 60 mph. Chance of rain near 100 percent.
Tuesday...Partly sunny with a 50 percent chance of showers. Cooler with highs in the mid 40s.
Tuesday Night And Wednesday...Mostly clear. Cold. Lows in the lower 20s. Highs in the mid 30s.
Wednesday Night And Thursday...Mostly cloudy. Lows in the upper 20s. Highs around 40.
Thursday Night...Mostly cloudy. Lows in the lower 30s.
Friday And Friday Night...Partly cloudy. Highs in the lower 40s. Lows in the lower 30s.
Saturday...Mostly cloudy with a 40 percent chance of rain. Highs in the lower 40s.
SHARE THIS PAGE: