5-day weather forecast Boston Sep 26, 2026
13°Weather forecast Boston Saturday Sep 26, 2026: light rain shower, temperature from 12 °C to 13 °C.
Precipitation probability 89%. Wind up to 11.61 m/s (gusts 20.61 m/s). Air humidity 91–95%, atmospheric pressure 755–761 mm Hg, UV index up to 0.6.
Weather Alerts
Small Craft Advisory issued September 23 at 2:24AM 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 40 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 2:24AM 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 40 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 06:36
Sunset 18:35
Sunset 18:35
Full Moon99% illuminated
Moonrise 18:22 · Moonset 06:33
Moonrise 18:22 · Moonset 06:33
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain | 13 °C | 76% (1.14 mm/hr) | 100% | 92% | 761 mm Hg | NNE 29° 10.39 (19.11) m/s | 0 |
| 01:00 |  Moderate rain | 13 °C | 87% (3.63 mm/hr) | 100% | 92% | 761 mm Hg | NNE 27° 10.89 (19.81) m/s | 0 |
| 02:00 | Moderate rain | 13 °C | 89% (4.44 mm/hr) | 100% | 94% | 761 mm Hg | NNE 25° 11 (20.11) m/s | 0 |
| 03:00 | Light rain | 13 °C | 84% (2.35 mm/hr) | 100% | 94% | 760 mm Hg | NNE 25° 11.5 (20.42) m/s | 0 |
| 04:00 | Light rain | 13 °C | 84% (2.4 mm/hr) | 100% | 93% | 759 mm Hg | NNE 24° 11.61 (20.61) m/s | 0 |
| 05:00 |  Light drizzle | 13 °C | 73% (0.68 mm/hr) | 100% | 93% | 759 mm Hg | NNE 20° 10.69 (20.31) m/s | 0 |
| 06:00 | Light rain | 13 °C | 78% (1.48 mm/hr) | 100% | 93% | 758 mm Hg | NNE 16° 10.61 (20.53) m/s | 0 |
| 07:00 |  Light rain | 12 °C | 77% (1.27 mm/hr) | 100% | 93% | 758 mm Hg | NNE 15° 11 (20.53) m/s | 0 |
| 08:00 | Light rain | 12 °C | 72% (0.82 mm/hr) | 100% | 93% | 758 mm Hg | NNE 15° 10.5 (19.92) m/s | 0 |
| 09:00 | Light rain | 12 °C | 71% (0.79 mm/hr) | 100% | 93% | 758 mm Hg | N 9° 10.31 (19.92) m/s | 0.1 |
| 10:00 |  Light drizzle | 12 °C | 71% (0.6 mm/hr) | 100% | 93% | 758 mm Hg | N 5° 10.31 (19.72) m/s | 0.2 |
| 11:00 | Light drizzle | 12 °C | 71% (0.61 mm/hr) | 100% | 92% | 758 mm Hg | N 7° 9.5 (18.19) m/s | 0.4 |
| 12:00 | Light rain shower | 12 °C | 45% (0.17 mm/hr) | 100% | 92% | 758 mm Hg | N 0° 9.39 (17.53) m/s | 0.4 |
| 13:00 | Light rain shower | 12 °C | 47% (0.21 mm/hr) | 100% | 92% | 758 mm Hg | N 354° 9.31 (17.42) m/s | 0.6 |
| 14:00 | Light drizzle | 12 °C | 63% (0.41 mm/hr) | 100% | 91% | 757 mm Hg | N 354° 9.5 (17.69) m/s | 0.5 |
| 15:00 | Light rain shower | 12 °C | 52% (0.3 mm/hr) | 100% | 91% | 756 mm Hg | N 354° 9.69 (17.61) m/s | 0.4 |
| 16:00 | Light rain shower | 12 °C | 53% (0.33 mm/hr) | 100% | 91% | 756 mm Hg | N 351° 9.19 (17.5) m/s | 0.3 |
| 17:00 | Light rain shower | 12 °C | 48% (0.22 mm/hr) | 100% | 92% | 756 mm Hg | NNW 348° 8.89 (17) m/s | 0.1 |
| 18:00 | Light rain shower | 12 °C | 49% (0.24 mm/hr) | 100% | 91% | 755 mm Hg | NNW 343° 9 (17.72) m/s | 0 |
| 19:00 |  Light rain shower | 12 °C | 52% (0.3 mm/hr) | 100% | 91% | 755 mm Hg | NNW 339° 8.81 (17.61) m/s | 0 |
| 20:00 | Light rain shower | 12 °C | 61% (0.47 mm/hr) | 100% | 92% | 755 mm Hg | NNW 334° 8.11 (16.22) m/s | 0 |
| 21:00 | Light rain shower | 12 °C | 63% (0.47 mm/hr) | 100% | 94% | 755 mm Hg | NNW 329° 7.81 (16.11) m/s | 0 |
| 22:00 | Light rain shower | 12 °C | 67% (0.57 mm/hr) | 100% | 95% | 755 mm Hg | NNW 333° 7.39 (15.72) m/s | 0 |
| 23:00 | Light rain | 12 °C | 74% (0.91 mm/hr) | 100% | 94% | 755 mm Hg | NNW 341° 7.81 (15.03) 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.