Boston Harbor at Boston (IN MLLW)
3.1 mi- Level
- 4.2 ft
Forecast peak 11.0 ft Mon 12 PM
Reading from Sat 2:06 AM · NWS gauge page
Observed 3:10 AM EDT at KBOS
Chelsea, MA weather
Clear and 43°6°.
Today: low 40°4° (likely 32°0° to 40°4°), high 58°14° (likely 56°13° to 61°16°).
Now 43°6°
Clear · Feels like 39°4°
- Wind
- 7 mph11 km/h
- From the west-northwest. Up to 7 mph11 km/h through 3 PM
- Dew point
- 34°1°
- Dry, static shocks likely
- UV index
- 0Low
- Moderate 11 AM–4 PM · peak 4
- Air quality
- 51Moderate
- Main pollutant: PM2.5 (fine particles)
- Pressure
- 30.49 inHg1033 hPa
- Rising slowly · +0.02 inHg+0.6 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
6°3° cooler than this time yesterday (48°9° then, 42°6° now)
Good hours for
TonightNear 46°8° · Clear
This morningUp to 53°12° by 11 AM · Clear
This afternoonNear 56°13° · Clear
TonightDown to 46°8° by 4 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonUp to 63°17° by 3 PM · Clear
Tomorrow nightDown to 47°8° by 2 AM · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 3a | Clear | 46°8° (likely 34°1° to 46°8°) | 45°7° | 0% | 3 mph5 km/h from NW, gusts 8 mph12 km/h | 53% | 1% | 0 |
| Sat 4a | Clear | 46°8° (likely 33°1° to 46°8°) | 45°7° | 0% | 3 mph5 km/h from NW, gusts 8 mph12 km/h | 51% | 2% | 0 |
| Sat 5a | Clear | 45°7° (likely 33°1° to 45°7°) | 44°7° | 0% | 3 mph5 km/h from NW, gusts 7 mph12 km/h | 53% | 7% | 0 |
| Sat 6a | Clear | 44°7° (likely 32°0° to 44°7°) | 42°6° | 0% | 3 mph5 km/h from NW, gusts 7 mph11 km/h | 55% | 11% | 0 |
| Sat 7a | Sunny | 43°6° (likely 32°0° to 43°6°) | 41°5° | 0% | 3 mph5 km/h from NW, gusts 6 mph10 km/h | 55% | 7% | 0 |
| Sat 8a | Sunny | 43°6° (likely 33°1° to 43°6°) | 41°5° | 0% | 3 mph5 km/h from NW, gusts 6 mph9 km/h | 55% | 4% | 0 |
| Sat 9a | Sunny | 46°8° (likely 38°3° to 46°8°) | 45°7° | 0% | 3 mph5 km/h from NW, gusts 5 mph9 km/h | 51% | 4% | 1 |
| Sat 10a | Sunny | 49°9° (likely 43°6° to 49°9°) | 48°9° | 0% | 3 mph5 km/h from NW, gusts 5 mph8 km/h | 50% | 6% | 2 |
| Sat 11a | Sunny | 53°12° (likely 48°9° to 53°12°) | 53°12° | 0% | 3 mph5 km/h from NW, gusts 5 mph9 km/h | 44% | 4% | 3 |
| Sat 12p | Sunny | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 40% | 5% | 4 |
| Sat 1p | Sunny | 57°14° (likely 54°12° to 58°14°) | 57°14° | 0% | 3 mph5 km/h from W, gusts 8 mph13 km/h | 40% | 3% | 4 |
| Sat 2p | Sunny | 58°14° (likely 55°13° to 60°16°) | 58°14° | 0% | 3 mph5 km/h from W, gusts 7 mph11 km/h | 39% | 1% | 4 |
| Sat 3p | Sunny | 58°14° (likely 55°13° to 61°16°) | 58°14° | 0% | 3 mph5 km/h from W, gusts 6 mph10 km/h | 37% | 0% | 3 |
| Sat 4p | Sunny | 57°14° (likely 55°13° to 61°16°) | 57°14° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 38% | 0% | 2 |
| Sat 5p | Sunny | 56°13° (likely 53°12° to 59°15°) | 56°13° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 38% | 0% | 1 |
| Sat 6p | Clear | 54°12° (likely 50°10° to 54°12°) | 54°12° | 0% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 43% | 0% | 0 |
| Sat 7p | Clear | 52°11° (likely 47°8° to 52°11°) | 52°11° | 0% | 2 mph3 km/h from SE, gusts 7 mph12 km/h | 50% | 0% | 0 |
| Sat 8p | Clear | 50°10° (likely 45°7° to 50°10°) | 50°10° | 0% | 2 mph3 km/h from S, gusts 7 mph11 km/h | 56% | 1% | 0 |
| Sat 9p | Clear | 49°9° (likely 44°7° to 49°9°) | 49°9° | 0% | 2 mph3 km/h from SW, gusts 6 mph10 km/h | 54% | 0% | 0 |
| Sat 10p | Clear | 48°9° (likely 43°6° to 48°9°) | 48°9° | 0% | 2 mph3 km/h from SW, gusts 4 mph7 km/h | 51% | 0% | 0 |
| Sat 11p | Clear | 48°9° (likely 42°6° to 48°9°) | 48°9° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 47% | 1% | 0 |
| Sun 12a | Clear | 48°9° (likely 40°4° to 48°9°) | 48°9° | 0% | 2 mph3 km/h from W, gusts 6 mph9 km/h | 47% | 4% | 0 |
| Sun 1a | Clear | 47°8° (likely 39°4° to 47°8°) | 47°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 51% | 0% | 0 |
| Sun 2a | Clear | 47°8° (likely 38°3° to 47°8°) | 47°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 51% | 0% | 0 |
| Sun 3a | Clear | 47°8° (likely 37°3° to 47°8°) | 47°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 51% | 0% | 0 |
| Sun 4a | Clear | 46°8° (likely 37°3° to 46°8°) | 46°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 53% | 0% | 0 |
| Sun 5a | Clear | 46°8° (likely 36°2° to 46°8°) | 46°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 53% | 5% | 0 |
| Sun 6a | Clear | 46°8° (likely 36°2° to 46°8°) | 46°8° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 53% | 9% | 0 |
| Sun 7a | Sunny | 46°8° (likely 35°2° to 46°8°) | 46°8° | 0% | 2 mph3 km/h from W, gusts 6 mph9 km/h | 51% | 12% | 0 |
| Sun 8a | Sunny | 47°8° (likely 36°2° to 47°8°) | 47°8° | 0% | 2 mph3 km/h from W, gusts 6 mph9 km/h | 49% | 13% | 0 |
| Sun 9a | Sunny | 49°9° (likely 42°6° to 49°9°) | 49°9° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 46% | 2% | 1 |
| Sun 10a | Sunny | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 41% | 0% | 2 |
| Sun 11a | Sunny | 56°13° (likely 54°12° to 56°13°) | 56°13° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 37% | 0% | 3 |
| Sun 12p | Sunny | 59°15° (likely 58°14° to 60°16°) | 59°15° | 0% | 3 mph5 km/h from SW, gusts 7 mph11 km/h | 34% | 0% | 4 |
| Sun 1p | Sunny | 61°16° (likely 60°16° to 63°17°) | 61°16° | 0% | 3 mph5 km/h from SW, gusts 7 mph11 km/h | 35% | 0% | 4 |
| Sun 2p | Sunny | 62°17° (likely 61°16° to 65°18°) | 62°17° | 0% | 3 mph5 km/h from SW, gusts 7 mph12 km/h | 35% | 0% | 4 |
| Sun 3p | Sunny | 63°17° (likely 61°16° to 66°19°) | 63°17° | 0% | 3 mph5 km/h from SW, gusts 8 mph12 km/h | 34% | 0% | 3 |
| Sun 4p | Sunny | 63°17° (likely 60°16° to 66°19°) | 63°17° | 0% | 3 mph5 km/h from S, gusts 8 mph13 km/h | 35% | 0% | 2 |
| Sun 5p | Sunny | 62°17° (likely 58°14° to 63°17°) | 62°17° | 0% | 3 mph5 km/h from S, gusts 9 mph15 km/h | 36% | 0% | 1 |
| Sun 6p | Clear | 60°16° (likely 55°13° to 60°16°) | 60°16° | 0% | 3 mph5 km/h from S, gusts 8 mph12 km/h | 39% | 0% | 0 |
| Sun 7p | Clear | 57°14° (likely 53°12° to 57°14°) | 57°14° | 0% | 5 mph8 km/h from S, gusts 7 mph12 km/h | 42% | 0% | 0 |
| Sun 8p | Clear | 55°13° (likely 49°9° to 55°13°) | 55°13° | 0% | 5 mph8 km/h from SW, gusts 9 mph14 km/h | 49% | 0% | 0 |
| Sun 9p | Clear | 54°12° (likely 44°7° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from SW, gusts 9 mph14 km/h | 52% | 0% | 0 |
| Sun 10p | Clear | 53°12° (likely 42°6° to 54°12°) | 53°12° | 0% | 5 mph8 km/h from SW, gusts 9 mph15 km/h | 57% | 0% | 0 |
| Sun 11p | Clear | 52°11° (likely 41°5° to 53°12°) | 52°11° | 0% | 5 mph8 km/h from SW, gusts 10 mph16 km/h | 61% | 0% | 0 |
| Mon 12a | Clear | 50°10° (likely 42°6° to 52°11°) | 48°9° | 0% | 5 mph8 km/h from SW, gusts 10 mph16 km/h | 66% | 0% | 0 |
| Mon 1a | Clear | 49°9° (likely 42°6° to 51°11°) | 47°8° | 0% | 5 mph8 km/h from SW, gusts 10 mph16 km/h | 66% | 0% | 0 |
| Mon 2a | Clear | 47°8° (likely 42°6° to 50°10°) | 45°7° | 0% | 5 mph8 km/h from SW, gusts 10 mph16 km/h | 71% | 0% | 0 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Mostly sunny. High 58°14°, low 40°4°. Typical 59°15° / 45°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 43°6°Dry
Afternoon
noon–6 PM
Sunny, 58°14°Dry
Evening
6 PM–midnight
Clear, 50°10°Dry
Overnight
midnight–6 AM
Clear, 46°8°Dry
Official NWS forecast
Today: Sunny, with a high near 58. West wind around 3 mph.
Tonight: Mostly clear, with a low around 40. Northwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 56°13°–61°16°
- Low, likely
- 32°0°–40°4°
- Typical high / low
- 59°15° / 45°7°
- Wind
- 6 mph9 km/h
- UV peak
- 4
Tomorrow, Oct 25. Sunny. High 63°17°, low 44°7°. Typical 59°15° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 47°8°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 55°13°Dry
Overnight
midnight–6 AM
Clear, 45°7°Dry
Official NWS forecast
Day: Sunny, with a high near 63. Southwest wind around 3 mph.
Night: Clear, with a low around 44. Southwest wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 62°17°–66°19°
- Low, likely
- 36°2°–44°7°
- Typical high / low
- 59°15° / 44°7°
- Wind
- 8 mph13 km/h, gusts 14 mph23 km/h
- UV peak
- 4
Monday, Oct 26. Mostly sunny. High 68°20°, low 42°6°. Typical 59°15° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 45°7°Dry
Afternoon
noon–6 PM
Sunny, 68°20°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Mostly clear, 47°8°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68. West wind around 7 mph.
Night: Mostly clear, with a low around 42. Northwest wind 5 to 8 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–70°21°
- Low, likely
- 42°6°–46°8°
- Typical high / low
- 59°15° / 44°7°
- Wind
- 11 mph18 km/h, gusts 24 mph39 km/h
- UV peak
- 4
Tuesday, Oct 27. Mostly sunny. High 52°11°, low 34°1°. Typical 58°14° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Partly sunny, 45°7°Dry
Afternoon
noon–6 PM
Sunny, 51°10°Dry
Evening
6 PM–midnight
Clear, 44°7°Dry
Overnight
midnight–6 AM
Clear, 37°3°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 52. North wind 3 to 9 mph.
Night: Clear, with a low around 34. North wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 52°11°–55°13°
- Low, likely
- 34°1°–44°7°
- Typical high / low
- 58°14° / 44°7°
- Wind
- 15 mph24 km/h, gusts 21 mph34 km/h
- UV peak
- 3
Wednesday, Oct 28. Mostly sunny. High 52°11°, low 38°3°. Typical 58°14° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 36°2°Dry
Afternoon
noon–6 PM
Sunny, 50°10°Dry
Evening
6 PM–midnight
Cloudy, 46°8°Dry
Overnight
midnight–6 AM
Cloudy, 44°6°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 52. Northeast wind around 5 mph.
Night: Mostly clear, with a low around 38. South wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 49°9°–53°12°
- Low, likely
- 32°0°–41°5°
- Typical high / low
- 58°14° / 44°7°
- Wind
- 9 mph15 km/h, gusts 15 mph25 km/h
- UV peak
- 4
Thursday, Oct 29. Partly sunny. High 62°17°, low 48°9°. Typical 58°14° / 43°6°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 45°7°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 54°12°Dry
Overnight
midnight–6 AM
Clear, 50°10°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62. Southwest wind 3 to 10 mph.
Night: Mostly clear, with a low around 48. Southwest wind around 9 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 60°16°–65°18°
- Low, likely
- 42°6°–48°9°
- Typical high / low
- 58°14° / 43°6°
- Wind
- 11 mph18 km/h, gusts 31 mph50 km/h
- UV peak
- 4
Friday, Oct 30. Mostly sunny. High 66°19°, low 49°9°. Typical 57°14° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 50°10°Dry
Afternoon
noon–6 PM
Sunny, 67°19°Dry
Evening
6 PM–midnight
Clear, 57°14°Dry
Overnight
midnight–6 AM
Cloudy, 48°9°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66. West wind around 9 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–70°21°
- Low, likely
- 47°8°–50°10°
- Typical high / low
- 57°14° / 43°6°
- Wind
- 13 mph22 km/h, gusts 25 mph41 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 63°17°, low 48°9°. Typical 57°14° / 43°6°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 47°8°Dry
Afternoon
noon–6 PM
Sunny, 60°16°Dry
Evening
6 PM–midnight
Mostly clear, 53°12°Dry
Overnight
midnight–6 AM
Cloudy, 49°9°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 57°14°–71°22°
- Low, likely
- 45°7°–50°10°
- Typical high / low
- 57°14° / 43°6°
- Wind
- 19 mph30 km/h, gusts 24 mph38 km/h
- UV peak
- 4
Sunday, Nov 1. Cloudy. High 64°18°, low 49°9°. Typical 57°14° / 42°6°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 49°9°Dry
Afternoon
noon–6 PM
Cloudy, 63°17°Dry
Evening
6 PM–midnight
Clear, 56°13°20% chance
Overnight
midnight–6 AM
Drizzle, 54°12°30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 57°14°–70°21°
- Low, likely
- 46°8°–54°12°
- Typical high / low
- 57°14° / 42°6°
- Wind
- 10 mph17 km/h, gusts 23 mph37 km/h
- UV peak
- 3
Monday, Nov 2. Drizzle. High 64°18°, low 54°12°. Typical 56°13° / 42°6°. Rain 0.07 in1.8 mm, 30% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 57°14°30% chance
Afternoon
noon–6 PM
Cloudy, 67°19°30% chance
Evening
6 PM–midnight
Cloudy, 59°15°30% chance · 0.05 in1.3 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 61°16°–68°20°
- Low, likely
- 51°11°–58°14°
- Typical high / low
- 56°13° / 42°6°
- Wind
- 15 mph25 km/h, gusts 39 mph62 km/h
- UV peak
- 2
The outlook
Today
Dry, high 58°, low 40°.
Tomorrow
Dry, high 63°, low 44°, warming up.
Monday
Dry, high 68°, low 42°, warming up.
Rest of week
Mostly dry, highs 52–66°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (BOX) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view
Rivers
NOAA river gauges within 25 mi
Below flood stage
Shawsheen River at Wilmington
15 mi- Level
- 2.2 ft
- Flow
- 15 cfs
Forecast peak 2.2 ft Sat 8 AM
Reading from Sat 1:30 AM · NWS gauge page
Muddy River at Brookline
5.8 mi- Level
- 7.5 ft
Reading from Sat 1:30 AM · NWS gauge page
Aberjona River at Winchester
6.5 mi- Level
- 7.2 ft
- Flow
- 12 cfs
Reading from Sat 1 AM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 74% less heating than a typical week.
This week 26Typical 98
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 15
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at.
Comfort
Dry air outside (dew point 34°F).
Open the windows?
Sun, 1:00 PM–6:00 PM
Good stretch to open the windows (air quality forecast not available for part of this window).
Is this typical?
Boston Area · official normals 1991–2020 · records 1872–2026
Oct 24, today vs a typical year
Today’s expected high is about typical for the date.
- Normal high / low
- 59°15° / 45°7°
- Forecast high / low
- 58°14° / 40°4°
- Record high
- 80°27° in 1900
- Record low
- 30°−1° in 1969
Last 7 days vs normal
On average 3°2° colder than normal (daily mean temperature).
- −9°−5°SunOct 18
- −5°−3°MonOct 19
- ±0°TueOct 20
- −2°−1°WedOct 21
- +3°+2°ThuOct 22
- —FriOct 23
- —SatOct 24
Chelsea weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:07 AM, sunset 5:48 PM.
- Daylight
- 10 h 40 min
- Losing 2 min 39 s a day; shortest Dec 21, 1 h 36 min less
- Golden hour
- 5:09–6:05 PM
- Morning 6:50–7:46 AM
- Blue hour
- 6:05–6:16 PM
- Morning 6:39–6:50 AM; first light 6:39 AM
Stars tonight? Fair
Clear 3:40–6:39 AM, but the moon is 96% lit and up.
Moon
Waxing gibbous
96% lit · growing
- Today
- sets 5:16 AM · rises 4:45 PM
- Full moon
- Oct 26
- New moon
- Nov 9
