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 OCT 8 2025

Mostly Clear
Temp: 67°F
  • Humidity:
  • 87%
  • Winds:
  • 10 MPH SSW
  • Gusts:
  • 23 MPH
  • Barometer:
  • 29.97 in.
  • Dewpoint:
  • 63°F
  • Heat index:
  • 67°F

  • Sunrise:
  • 6:42 AM EDT
  • Sunset:
  • 6:10 PM EDT
  • Moonrise:
  • 6:47 PM EDT
  • Moonset:
  • 8:35 AM EDT

TONIGHT

CLOUDY
Lo: 65°F

WEDNESDAY

THUNDER STORMS
Hi: 71°F
Lo: 47°F
Precip: 100%

THURSDAY

SUNNY

Hi: 59°F
Lo: 39°F

FRIDAY

SUNNY

Hi: 61°F
Lo: 51°F
Weather Forecast In Detail:
Forecast Issued: 102 AM EDT Wed Oct 08 2025

Rest Of Tonight...Cloudy. Near steady temperature in the mid 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph.
Wednesday...Rain with isolated thunderstorms. Patchy fog. Humid with highs in the lower 70s. Temperature falling into the lower 60s in the afternoon. Southwest winds 15 to 20 mph, becoming northwest in the afternoon. Gusts up to 30 mph. Chance of rain near 100 percent.
Wednesday Night...Mostly cloudy in the evening, then clearing. Patchy fog in the evening. Much cooler. Less humid with lows in the upper 40s. North winds 15 to 20 mph with gusts up to 30 mph.
Thursday...Sunny, cooler with highs in the upper 50s. North winds 15 to 20 mph with gusts up to 30 mph.
Thursday Night...Mostly clear. Lows in the upper 30s. North winds 10 to 15 mph. Gusts up to 25 mph in the evening.
Friday...Sunny. Highs in the lower 60s.
Friday Night...Mostly clear. Not as cool with lows in the lower 50s.
Saturday...Mostly sunny. Highs in the mid 60s.
Saturday Night...Mostly cloudy. Lows in the lower 50s.
Sunday...Partly sunny with a 40 percent chance of showers. Breezy with highs in the lower 60s.
Sunday Night...Mostly cloudy with a chance of showers. Breezy. Near steady temperature in the mid 50s. Chance of rain 50 percent.
Columbus Day Through Tuesday...Mostly cloudy with a 40 percent chance of showers. Breezy. Highs in the mid 60s. Lows in the mid 50s.
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