Marine Weather Net

Harwich, MA Weather Forecast


Marine Forecast: Nantucket Sound


Harwich, Massachusetts

 Lat: 41.69N, Lon: 70.08W

Current Conditions Updated: 152 PM EDT SUN JUL 19 2026

Clear


Temp: 74°F
  • Humidity:
  • 48%
  • Winds:
  • 10 MPH NNW
  • Gusts:
  • 22 MPH
  • Barometer:
  • 29.75 in.
  • Dewpoint:
  • 53°F
  • Heat index:
  • 77°F

  • Sunrise:
  • 5:21 AM EDT
  • Sunset:
  • 8:09 PM EDT
  • Moonrise:
  • 11:26 AM EDT
  • Moonset:
  • 10:58 PM EDT

THIS AFTERNOON

SUNNY

Lo: 61°F

MONDAY

SUNNY

Hi: 79°F
Lo: 69°F

TUESDAY

MOSTLY CLOUDY
Hi: 79°F
Lo: 70°F

WEDNESDAY

CHANCE OF T-STORM
Hi: 81°F
Lo: 69°F
Precip: 90%
Weather Forecast In Detail:
Forecast Issued: 103 PM EDT Sun Jul 19 2026

HIGH RIP CURRENT RISK IN EFFECT UNTIL 8 PM EDT THIS EVENING
This Afternoon...Sunny. Near steady temperature in the mid 70s. Northwest winds 5 to 10 mph with gusts up to 20 mph.
Tonight...Mostly clear. Lows in the lower 60s. Northwest winds around 5 mph.
Monday...Sunny. Highs in the upper 70s. Northwest winds around 5 mph, becoming southwest in the afternoon.
Monday Night...Partly cloudy. Lows in the upper 60s. South winds 5 to 10 mph.
Tuesday...Mostly cloudy. Humid with highs in the upper 70s. South winds 10 to 15 mph with gusts up to 25 mph.
Tuesday Night...Showers with a chance of thunderstorms. Lows around 70. Chance of rain near 100 percent.
Wednesday...Showers with a chance of thunderstorms. Highs in the lower 80s. Chance of rain 90 percent.
Wednesday Night...Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.
Thursday And Thursday Night...Partly cloudy. Highs in the upper 70s. Lows in the upper 60s.
Friday...Sunny. Highs around 80.
Friday Night...Partly cloudy. Lows in the upper 60s.
Saturday...Sunny. Highs in the lower 80s.
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