Marine Weather Net

Chatham, MA Weather Forecast


Marine Forecast: Nantucket Sound


Chatham, Massachusetts

 Lat: 41.68N, Lon: 69.96W

Current Conditions Updated: 652 PM EDT WED AUG 5 2026

Clear


Temp: 75°F
  • Humidity:
  • 66%
  • Winds:
  • 7 MPH VRB
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.14 in.
  • Dewpoint:
  • 63°F
  • Heat index:
  • 77°F

  • Sunrise:
  • 5:36 AM EDT
  • Sunset:
  • 7:51 PM EDT
  • Moonrise:
  • 11:02 PM EDT
  • Moonset:
  • 1:10 PM EDT

TONIGHT

PARTLY CLOUDY
Lo: 70°F

THURSDAY

MOSTLY SUNNY
Hi: 81°F
Lo: 75°F

FRIDAY

MOSTLY SUNNY
Hi: 85°F
Lo: 75°F

SATURDAY

PARTLY CLOUDY
Hi: 81°F
Lo: 71°F
Weather Forecast In Detail:
Forecast Issued: 403 PM EDT Wed Aug 05 2026

Tonight...Partly cloudy this evening, then becoming mostly cloudy. Lows around 70. Southwest winds 5 to 10 mph.
Thursday...Mostly cloudy in the morning, then becoming mostly sunny. Patchy fog in the morning. Humid with highs in the lower 80s. Southwest winds 10 to 15 mph.
Thursday Night...Partly cloudy in the evening, then becoming mostly cloudy. Patchy fog after midnight. Humid with lows in the lower 70s. Southwest winds 10 to 15 mph.
Friday...Mostly sunny. Humid with highs in the mid 80s. Southwest winds 10 to 15 mph.
Friday Night...Partly cloudy. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the evening.
Saturday...Partly cloudy. Highs in the lower 80s. Lows in the lower 70s.
Sunday...Partly cloudy. Highs in the lower 80s. Lows in the lower 70s.
Sunday Night And Monday...Mostly clear. Lows around 70. Highs in the mid 80s.
Monday Night...Partly cloudy. Lows around 70.
Tuesday...Partly sunny with a chance of showers. Highs in the lower 80s. Chance of rain 40 percent.
Tuesday Night...Mostly cloudy with a 40 percent chance of showers. Lows in the upper 60s.
Wednesday...Mostly sunny. Highs around 80.
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