Marine Weather Net

Winthrop, MA Weather Forecast


Marine Forecast: Boston Harbor


Winthrop, Massachusetts

 Lat: 42.38N, Lon: 70.98W

Current Conditions Updated: 822 PM EDT THU MAY 14 2026

Fair
Temp: 51°F
  • Humidity:
  • 96%
  • Winds:
  • 5 MPH E
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.7 in.
  • Dewpoint:
  • 50°F
  • Heat index:
  • 51°F

  • Sunrise:
  • 5:22 AM EDT
  • Sunset:
  • 7:56 PM EDT
  • Moonrise:
  • 3:41 AM EDT
  • Moonset:
  • 5:40 PM EDT

TONIGHT

CHANCE OF SHOWERS
Lo: 50°F
Precip: 100%

FRIDAY

SHOWERS
Lo: 50°F
Precip: 90%

SATURDAY

SUNNY

Hi: 75°F
Lo: 55°F

MONDAY

MOSTLY SUNNY
Hi: 71°F
Lo: 61°F
Weather Forecast In Detail:
Forecast Issued: 702 PM EDT Thu May 14 2026

Tonight...Showers this evening, then a chance of showers with areas of drizzle after midnight. Areas of fog. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain near 100 percent.
Friday...Cloudy. Showers with areas of drizzle, mainly in the morning. Areas of fog. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 90 percent.
Friday Night...Mostly cloudy in the evening, then clearing. Areas of fog in the evening. Near steady temperature around 50. Northwest winds 5 to 10 mph, becoming west after midnight.
Saturday...Sunny. Not as cool with highs in the mid 70s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.
Saturday Night...Partly cloudy. Lows in the upper 50s. Southwest winds 10 to 15 mph.
Sunday And Sunday Night...Mostly clear. Highs in the upper 70s. Lows in the mid 50s.
Monday...Mostly sunny. Highs in the lower 70s.
Monday Night And Tuesday...Mostly clear. Lows in the mid 50s. Highs in the upper 80s.
Tuesday Night...Partly cloudy. Lows in the lower 60s.
Wednesday...Partly sunny with a 30 percent chance of showers. Highs in the upper 80s.
Wednesday Night...Mostly cloudy with a 30 percent chance of showers. Lows in the upper 50s.
Thursday...Partly sunny with a 30 percent chance of showers. Cooler with highs in the mid 70s.
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