Weather WorldBoston Harbor Island State Park, MA Weather Forecast
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Boston Harbor Island State Park Weather Forecast
| REST OF TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | | | |  | | |  | |
| Mostly Clear | Partly Sunny | Chance of Rain | Mostly Sunny | Mostly Clear | Mostly Cloudy | Chance of Rain | Rain | Rain | Chance of Rain | Partly Cloudy | Sunny |
| Lo: 30°FLo: -1°C | Hi: 41°FHi: 5°C | Lo: 40°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 51°FHi: 11°C | Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C |
| POP: 40% | POP: 50% | POP: 100% | POP: 100% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 105 AM EDT Fri Mar 13 2026 
Boston Harbor Island State Park Radar Loop
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