5-day weather forecast Boston Sep 25, 2026
15°Weather forecast Boston tomorrow Sep 25, 2026: overcast, temperature from 13 °C to 15 °C.
Precipitation probability 55%. Wind up to 9.19 m/s (gusts 17.14 m/s). Air humidity 67–90%, atmospheric pressure 763–770 mm Hg, UV index up to 2.4.
Weather Alerts
Small Craft Advisory issued September 23 at 3:58PM EDT until September 25 at 8:00AM EDT by NWS Boston/Norton MA
Small Craft Advisory
* WHAT...For the Small Craft Advisory, northeast winds 15 to 25
kt with gusts up to 30 kt and waves 2 to 3 feet. For the Gale
Warning, north winds 20 to 30 kt with gusts up to 45 kt and
waves 2 to 4 feet expected.
* WHERE...Boston Harbor.
* WHEN...For the Small Craft Advisory, until 8 AM EDT Friday.
For the Gale Warning, from 8 AM Friday to 8 PM EDT Saturday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
Gale Warning issued September 23 at 3:58PM EDT until September 26 at 8:00PM EDT by NWS Boston/Norton MA
Gale Warning
* WHAT...For the Small Craft Advisory, northeast winds 15 to 25
kt with gusts up to 30 kt and waves 2 to 3 feet. For the Gale
Warning, north winds 20 to 30 kt with gusts up to 45 kt and
waves 2 to 4 feet expected.
* WHERE...Boston Harbor.
* WHEN...For the Small Craft Advisory, until 8 AM EDT Friday.
For the Gale Warning, from 8 AM Friday to 8 PM EDT Saturday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
5 days at a glance — tap a day to open it
Sunrise 06:34
Sunset 18:36
Sunset 18:36
Full Moon100% illuminated
Moonrise 18:03 · Moonset 05:30
Moonrise 18:03 · Moonset 05:30
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 13 °C | 17% | 100% | 67% | 770 mm Hg | NNE 24° 5 (10.22) m/s | 0 |
| 01:00 | Overcast | 13 °C | 18% | 100% | 68% | 769 mm Hg | NNE 24° 5.39 (11.61) m/s | 0 |
| 02:00 |  Cloudy | 14 °C | 13% | 77% | 67% | 768 mm Hg | NNE 28° 5.61 (11.53) m/s | 0 |
| 03:00 | Overcast | 13 °C | 17% | 100% | 68% | 767 mm Hg | NNE 24° 6.61 (12.72) m/s | 0 |
| 04:00 | Overcast | 13 °C | 18% | 100% | 69% | 767 mm Hg | NNE 21° 6.69 (12.61) m/s | 0 |
| 05:00 | Overcast | 13 °C | 18% | 100% | 68% | 767 mm Hg | NNE 23° 6.19 (12) m/s | 0 |
| 06:00 | Overcast | 14 °C | 17% | 100% | 67% | 767 mm Hg | NNE 30° 6.61 (13.11) m/s | 0 |
| 07:00 | Overcast | 14 °C | 17% | 100% | 67% | 767 mm Hg | NNE 29° 6.89 (12.92) m/s | 0 |
| 08:00 | Overcast | 14 °C | 18% | 100% | 68% | 767 mm Hg | NNE 24° 6.89 (12.61) m/s | 0.3 |
| 09:00 | Overcast | 14 °C | 18% | 100% | 69% | 767 mm Hg | NNE 25° 7.5 (13.64) m/s | 0.9 |
| 10:00 | Overcast | 15 °C | 18% | 100% | 68% | 767 mm Hg | NNE 29° 7.31 (13.31) m/s | 1.6 |
| 11:00 | Overcast | 14 °C | 18% | 100% | 69% | 767 mm Hg | NNE 32° 7.81 (13.92) m/s | 2 |
| 12:00 | Overcast | 15 °C | 18% | 100% | 68% | 766 mm Hg | NNE 33° 8.11 (14.31) m/s | 2.3 |
| 13:00 | Overcast | 15 °C | 17% | 100% | 67% | 765 mm Hg | NNE 31° 8.19 (14.31) m/s | 2.4 |
| 14:00 | Overcast | 15 °C | 17% | 100% | 68% | 765 mm Hg | NE 40° 7.5 (13.81) m/s | 2.4 |
| 15:00 | Overcast | 15 °C | 19% | 100% | 71% | 765 mm Hg | NE 48° 8 (14.11) m/s | 1.5 |
| 16:00 | Overcast | 14 °C | 22% | 100% | 76% | 764 mm Hg | NE 50° 7.81 (13.22) m/s | 0.9 |
| 17:00 | Overcast | 14 °C | 21% | 100% | 75% | 764 mm Hg | NE 45° 7.61 (13.42) m/s | 0.2 |
| 18:00 |  Patchy rain possible | 14 °C | 22% (0.01 mm/hr) | 100% | 75% | 764 mm Hg | ENE 59° 6.89 (11.61) m/s | 0.1 |
| 19:00 |  Patchy rain possible | 13 °C | 22% (0.02 mm/hr) | 100% | 74% | 764 mm Hg | ENE 59° 7.19 (12.5) m/s | 0 |
| 20:00 | Patchy rain possible | 13 °C | 22% (0.02 mm/hr) | 100% | 74% | 764 mm Hg | NE 53° 8.31 (15.53) m/s | 0 |
| 21:00 | Overcast | 13 °C | 21% | 100% | 74% | 764 mm Hg | NE 50° 8 (15.5) m/s | 0 |
| 22:00 |  Light drizzle | 13 °C | 55% (0.37 mm/hr) | 100% | 82% | 764 mm Hg | NE 42° 8.81 (16.11) m/s | 0 |
| 23:00 | Light drizzle | 13 °C | 51% (0.19 mm/hr) | 100% | 90% | 763 mm Hg | NE 36° 9.19 (17.14) m/s | 0 |
Boston on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.