Marine Weather Net

Winthrop, MA Weather Forecast


Marine Forecast: Boston Harbor


Winthrop, Massachusetts

 Lat: 42.38N, Lon: 70.98W

Current Conditions Updated: 954 AM EDT MON MAY 4 2026

Mostly Clear
Temp: 63°F
  • Humidity:
  • 33%
  • Winds:
  • 13 MPH WSW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.83 in.
  • Dewpoint:
  • 34°F
  • Heat index:
  • 63°F

  • Sunrise:
  • 5:33 AM EDT
  • Sunset:
  • 7:45 PM EDT
  • Moonrise:
  • 11:14 PM EDT
  • Moonset:
  • 6:49 AM EDT

THIS AFTERNOON

SUNNY

Hi: 71°F
Lo: 51°F

TUESDAY

SUNNY

Hi: 80°F
Lo: 59°F

WEDNESDAY

SHOWERS
Hi: 69°F
Lo: 45°F
Precip: 70%

FRIDAY

MOSTLY SUNNY
Hi: 61°F
Lo: 45°F
Weather Forecast In Detail:
Forecast Issued: 1002 AM EDT Mon May 04 2026

This Afternoon...Sunny. Not as cool with highs in the lower 70s. Southwest winds 15 to 20 mph with gusts up to 35 mph.
Tonight...Mostly clear. Lows in the lower 50s. Southwest winds 15 to 20 mph. Gusts up to 30 mph in the evening.
Tuesday...Sunny, breezy with highs around 80. Southwest winds 15 to 25 mph. Gusts up to 45 mph in the afternoon.
Tuesday Night...Mostly cloudy and breezy. Lows in the upper 50s. Southwest winds 15 to 25 mph. Gusts up to 40 mph, Decreasing to 30 mph after midnight.
Wednesday...Showers likely. Cooler with highs in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent.
Wednesday Night...Showers. Lows in the lower 50s. Chance of rain 80 percent.
Thursday And Thursday Night...Mostly cloudy. A 50 percent chance of showers. Highs in the lower 60s. Lows in the mid 40s.
Friday...Mostly sunny. Highs in the lower 60s.
Friday Night...Mostly clear. Lows in the mid 40s.
Saturday...Mostly sunny. Highs in the lower 60s.
Saturday Night...Mostly cloudy with a 30 percent chance of showers. Lows in the mid 40s.
Sunday...Partly sunny with a 30 percent chance of showers. Highs in the mid 60s.
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