Marine Weather Net

Harwich, MA Weather Forecast


Marine Forecast: Nantucket Sound


Harwich, Massachusetts

 Lat: 41.69N, Lon: 70.08W

Current Conditions Updated: 652 PM EST FRI JAN 9 2026

Mostly Clear
Temp: 43°F
  • Humidity:
  • 92%
  • Winds:
  • 8 MPH S
  • Gusts:
  • 18 MPH
  • Barometer:
  • 30.11 in.
  • Dewpoint:
  • 41°F
  • Heat index:
  • 43°F

  • Sunrise:
  • 7:06 AM EST
  • Sunset:
  • 4:26 PM EST
  • Moonrise:
  • 11:43 PM EST
  • Moonset:
  • 10:29 AM EST

TONIGHT

CHANCE OF RAIN
Lo: 39°F
Precip: 50%

SATURDAY

CHANCE OF RAIN
Lo: 40°F
Precip: 40%

SUNDAY

RAIN
Lo: 29°F
Precip: 90%

MONDAY

SUNNY

Hi: 39°F
Lo: 31°F
Weather Forecast In Detail:
Forecast Issued: 705 PM EST Fri Jan 09 2026

Tonight...Cloudy. A chance of rain, mainly this evening. Patchy fog. Lows in the upper 30s. South winds 15 to 20 mph, becoming west after midnight. Gusts up to 30 mph. Chance of rain 50 percent.
Saturday...Mostly cloudy. A chance of rain in the afternoon. Near steady temperature in the lower 40s. Northwest winds 5 to 10 mph, becoming northeast in the afternoon. Chance of rain 40 percent.
Saturday Night...Rain. Near steady temperature around 40. East winds 5 to 10 mph, becoming southeast after midnight. Gusts up to 20 mph. Chance of rain near 100 percent.
Sunday...Rain. Near steady temperature in the lower 40s. West winds 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of rain 90 percent.
Sunday Night...Partly cloudy and blustery, cooler with lows in the upper 20s. West winds 15 to 25 mph with gusts up to 45 mph.
Monday...Sunny, blustery with highs in the upper 30s.
Monday Night And Tuesday...Partly cloudy. Lows in the lower 30s. Highs in the lower 40s.
Tuesday Night And Wednesday...Mostly cloudy. Lows in the mid 30s. Highs in the mid 40s.
Wednesday Night...Cloudy with a 30 percent chance of rain showers. Lows in the lower 30s.
Thursday...Mostly cloudy with a chance of rain, snow and freezing rain. Near steady temperature in the mid 30s. Chance of precipitation 30 percent.
Thursday Night...Mostly cloudy with a chance of snow and freezing rain. Lows in the mid 20s. Chance of precipitation 40 percent.
Friday...Mostly cloudy with a 40 percent chance of snow. Near steady temperature in the upper 20s.
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