Marine Weather Net

Harwich, MA Weather Forecast


Marine Forecast: Nantucket Sound


Harwich, Massachusetts

 Lat: 41.69N, Lon: 70.08W

Current Conditions Updated: 1052 AM EDT SAT APR 4 2026

Overcast
Temp: 48°F
  • Humidity:
  • 73%
  • Winds:
  • 20 MPH NE
  • Gusts:
  • 29 MPH
  • Barometer:
  • 30.28 in.
  • Dewpoint:
  • 40°F
  • Heat index:
  • 48°F

  • Sunrise:
  • 6:17 AM EDT
  • Sunset:
  • 7:07 PM EDT
  • Moonrise:
  • 10:15 PM EDT
  • Moonset:
  • 7:05 AM EDT

THIS AFTERNOON

MOSTLY SUNNY
Hi: 51°F
Lo: 37°F

SUNDAY

CHANCE OF SHOWERS
Hi: 55°F
Lo: 39°F
Precip: 90%

MONDAY

MOSTLY SUNNY
Hi: 49°F
Lo: 35°F

TUESDAY

PARTLY SUNNY
Hi: 45°F
Lo: 31°F
Precip: 50%
Weather Forecast In Detail:
Forecast Issued: 1002 AM EDT Sat Apr 04 2026

This Afternoon...Mostly sunny. Highs in the lower 50s. Temperature falling into the lower 40s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Tonight...Mostly cloudy. A chance of showers after midnight. Patchy fog after midnight. Lows in the upper 30s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent.
Sunday...Cloudy. A chance of showers in the morning, then showers in the afternoon. Patchy fog. Highs in the mid 50s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 90 percent.
Sunday Night...Showers. Patchy fog. Lows in the upper 30s. Southwest winds 10 to 15 mph, becoming west 5 to 10 mph after midnight. Gusts up to 25 mph. Chance of rain 80 percent.
Monday...Mostly sunny. Highs in the upper 40s. West winds 10 to 15 mph.
Monday Night...Partly cloudy. Lows in the mid 30s.
Tuesday...Partly sunny with a 50 percent chance of rain showers. Highs in the mid 40s.
Tuesday Night...Partly cloudy with a 40 percent chance of rain showers. Lows around 30.
Wednesday And Wednesday Night...Mostly clear. Highs in the lower 40s. Lows in the lower 30s.
Thursday...Sunny. Highs in the upper 40s.
Thursday Night And Friday...Partly cloudy. Lows around 40. Highs in the lower 50s.
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