Marine Weather Net

Harwich, MA Weather Forecast


Marine Forecast: Nantucket Sound


Harwich, Massachusetts

 Lat: 41.69N, Lon: 70.08W

Current Conditions Updated: 552 AM EDT WED SEP 16 2026

Overcast
Temp: 54°F
  • Humidity:
  • 96%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.36 in.
  • Dewpoint:
  • 53°F
  • Heat index:
  • 54°F

  • Sunrise:
  • 6:19 AM EDT
  • Sunset:
  • 6:48 PM EDT
  • Moonrise:
  • 12:23 PM EDT
  • Moonset:
  • 9:17 PM EDT

TODAY

MOSTLY SUNNY
Hi: 69°F
Lo: 61°F

THURSDAY

MOSTLY SUNNY
Hi: 71°F
Lo: 65°F

FRIDAY

PARTLY SUNNY
Hi: 71°F
Lo: 55°F
Precip: 50%

MONDAY

CHANCE OF SHOWERS
Hi: 69°F
Lo: 59°F
Precip: 30%
Weather Forecast In Detail:
Forecast Issued: 404 AM EDT Wed Sep 16 2026

Today...Mostly sunny. Highs in the upper 60s. Southwest winds 5 to 10 mph.
Tonight...Partly cloudy. Lows in the lower 60s. Southwest winds 5 to 10 mph.
Thursday...Mostly sunny. Humid with highs in the lower 70s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.
Thursday Night...Mostly cloudy with a 50 percent chance of showers. Humid with lows in the mid 60s. Southwest winds 5 to 10 mph with gusts up to 20 mph.
Friday...Partly sunny with a 50 percent chance of showers. Highs in the lower 70s. West winds around 10 mph, becoming north in the afternoon. Gusts up to 20 mph.
Friday Night And Saturday...Partly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Saturday Night...Mostly cloudy. Lows in the mid 50s.
Sunday And Sunday Night...Mostly cloudy with a 50 percent chance of showers. Highs in the upper 60s. Lows in the mid 50s.
Monday...Mostly cloudy with a 30 percent chance of showers. Highs in the upper 60s. Lows in the upper 50s.
Tuesday...Mostly cloudy with a 30 percent chance of showers. Highs in the upper 60s. Lows in the upper 50s.
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