Marine Weather Net

Harwich, MA Weather Forecast


Marine Forecast: Nantucket Sound


Harwich, Massachusetts

 Lat: 41.69N, Lon: 70.08W

Current Conditions Updated: 821 AM EST SUN DEC 14 2025

Light Snow
Temp: 32°F
  • Humidity:
  • 95%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.92 in.
  • Dewpoint:
  • 31°F
  • Heat index:
  • 32°F

  • Sunrise:
  • 6:57 AM EST
  • Sunset:
  • 4:09 PM EST
  • Moonrise:
  • 1:54 AM EST
  • Moonset:
  • 12:46 PM EST

TODAY

SNOW
Lo: 19°F
Precip: 100%

MONDAY

MOSTLY SUNNY
Hi: 30°F
Lo: 25°F

TUESDAY

SUNNY

Hi: 39°F
Lo: 41°F

FRIDAY

SHOWERS
Hi: 51°F
Lo: 25°F
Precip: 60%
Weather Forecast In Detail:
Forecast Issued: 704 AM EST Sun Dec 14 2025

WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING
Today...Snow this morning, then snow with a chance of rain this afternoon. Snow accumulation of 2 to 4 inches. Near steady temperature in the lower 30s. North winds around 5 mph, increasing to 10 to 15 mph with gusts up to 30 mph this afternoon. Chance of precipitation near 100 percent.
Tonight...Mostly cloudy. Snow likely in the evening. Total snow accumulation of 4 to 6 inches. Blustery, cooler with lows 16 to 22. North winds 15 to 25 mph with gusts up to 40 mph. Chance of snow 70 percent.
Monday...Mostly sunny. Highs around 30. Northwest winds 15 to 20 mph with gusts up to 40 mph.
Monday Night...Mostly cloudy. Near steady temperature in the mid 20s. West winds 10 to 15 mph with gusts up to 30 mph.
Tuesday...Sunny. Highs in the upper 30s. West winds 5 to 10 mph with gusts up to 20 mph.
Tuesday Night And Wednesday...Mostly cloudy. Lows in the upper 20s. Highs in the mid 40s.
Wednesday Night And Thursday...Partly cloudy. Lows in the lower 30s. Highs around 50.
Thursday Night...Showers likely. Not as cool with lows in the lower 40s. Temperature rising into the upper 40s after midnight. Chance of rain 70 percent.
Friday...Showers likely. Highs in the lower 50s. Temperature falling into the lower 40s in the afternoon. Chance of rain 60 percent.
Friday Night...Partly cloudy. Much cooler with lows in the mid 20s.
Saturday...Partly sunny. Highs in the mid 40s.
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