Marine Weather Net

Cambridge, MA Weather Forecast


Marine Forecast: Boston Harbor


Cambridge, Massachusetts

 Lat: 42.38N, Lon: 71.11W

Current Conditions Updated: 1254 AM EDT TUE MAY 19 2026

Mostly Clear
Temp: 70°F
  • Humidity:
  • 70%
  • Winds:
  • 8 MPH SSW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.07 in.
  • Dewpoint:
  • 60°F
  • Heat index:
  • 74°F

  • Sunrise:
  • 5:17 AM EDT
  • Sunset:
  • 8:01 PM EDT
  • Moonrise:
  • 7:30 AM EDT
  • Moonset:
  • 11:51 PM EDT

TONIGHT

MOSTLY CLEAR
Lo: 69°F

TUESDAY

SUNNY

Hi: 95°F
Lo: 71°F
Precip: 20%

WEDNESDAY

SHOWERS
Hi: 90°F
Lo: 55°F
Precip: 70%

THURSDAY

MOSTLY SUNNY
Hi: 69°F
Lo: 49°F
Weather Forecast In Detail:
Forecast Issued: 104 AM EDT Tue May 19 2026

HEAT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 8 PM EDT WEDNESDAY
Rest Of Tonight...Mostly clear. Near steady temperature in the upper 60s. Southwest winds 5 to 10 mph.
Tuesday...Sunny. A slight chance of showers in the afternoon. Much warmer with highs in the mid 90s. Southwest winds 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of rain 20 percent.
Tuesday Night...Partly cloudy with a chance of showers in the evening, then mostly clear after midnight. Lows in the lower 70s. Southwest winds around 10 mph. Gusts up to 20 mph in the evening. Chance of rain 30 percent.
Wednesday...Showers likely. Hot with highs around 90. Temperature falling into the lower 80s in the afternoon. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent.
Wednesday Night...Mostly cloudy with a 50 percent chance of showers. Much cooler. Less humid with lows in the mid 50s. Northwest winds 5 to 10 mph. Gusts up to 20 mph in the evening.
Thursday...Mostly sunny. Much cooler with highs in the upper 60s.
Thursday Night...Mostly clear. Lows in the upper 40s.
Friday...Mostly sunny. Highs in the upper 60s.
Friday Night...Mostly cloudy with a 30 percent chance of showers. Lows in the upper 40s.
Saturday...Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.
Saturday Night...Showers likely. Lows in the upper 40s. Chance of rain 60 percent.
Sunday...Showers likely. Highs in the lower 60s. Chance of rain 60 percent.
Sunday Night And Memorial Day...Mostly cloudy with a 30 percent chance of showers. Lows in the upper 40s. Highs in the mid 60s.
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