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Weather Conditions for Onset, Massachusetts : Plymouth County
Issued: 2:30 am EDT Aug 29, 2026 Latitude: 41.7417714 Longitude: -70.6578104 View on Google Maps

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Today Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Mostly Sunny on Today Increasing Clouds on Tonight Mostly Sunny on Sunday Mostly Sunny on Monday Partly Sunny on Tuesday 50% chance of rain on Wednesday 50% chance of  on Thursday Partly Sunny on Friday
High: 74°F Low: 63°F High: 78°F High: 74°F High: 73°F High: 73°F High: 76°F High: 73°F
Low: 67°F Low: 63°F Low: 64°F Low: 67°F Low: 65°F  
Mostly Sunny Increasing Clouds Mostly Sunny Mostly Sunny Partly Sunny Rain Partly Sunny Partly Sunny
Current Conditions at
COAST GUARD AIR STA - (KFMH)
64°
Clear
as of 8:56 PM EDST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
PLYMOUTH - (KPYM)
64°
Clear
as of 8:52 PM EDST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
NEW BEDFORD - (KEWB)
64°
Clear
as of 8:53 PM EDST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
3 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
HYANNIS - (KHYA)
66°
Clear
as of 8:56 PM EDST
Rel. Humidity: 88%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
9 MPH
240° Southwest
Cloud Level(s): Clear
Mostly Sunny on Today Today... Mostly sunny, with a high near 74. East wind 6 to 8 mph.

Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 63. South wind around 6 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 78. Southwest wind 7 to 16 mph.

30% chance of rain Sunday Night Sunday Night... A chance of showers, mainly after 9pm. Partly cloudy during the early evening, then becoming cloudy, with a low around 67. Southwest wind 6 to 13 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 74. Northwest wind 6 to 8 mph becoming northeast in the afternoon.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 63. Light southeast wind.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 73. Light southeast wind increasing to 5 to 9 mph in the morning.

40% chance of rain Tuesday Night Tuesday Night... A chance of showers. Mostly cloudy, with a low around 64. Southeast wind around 6 mph. Chance of precipitation is 40%.

50% chance of rain Wednesday Wednesday... A chance of showers. Mostly cloudy, with a high near 73. South wind 8 to 13 mph. Chance of precipitation is 50%.

60% chance of rain Wednesday Night Wednesday Night... Showers likely, mainly between 9pm and 3am. Mostly cloudy, with a low around 67. South wind around 8 mph. Chance of precipitation is 60%.

50% chance of  Thursday Thursday... A chance of showers. Partly sunny, with a high near 76. Southwest wind 7 to 11 mph. Chance of precipitation is 50%.

30% chance of rain Thursday Night Thursday Night... A chance of showers. Mostly cloudy, with a low around 65. Southwest wind around 8 mph becoming northwest after midnight. Chance of precipitation is 30%.

Partly Sunny on Friday Friday... Partly sunny, with a high near 73. North wind around 10 mph.

Massachusetts' Warnings, Watches, and AdvisoriesMassachusetts' Watches, Warnings, and Advisories

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Sun Almanac for Onset, Massachusetts
Astronomical Sunrise 04:50 AM?Astronomical sunrise occurs when the Sun is 18° below the horizon and the sky begins to brighten from a completly darkened state.
Nautical Sunrise 05:23 AM?Nautical sunrise (or nautical dawn) is the precise moment when the sun's center is 12° below the horizon in the morning. It marks the beginning of nautical twilight, allowing pilots/mariners to see the horizon.
Civil Sunrise 05:56 AM?Civil sunrise is the moment in the morning when the sun's center is 6° below the horizon. It marks the start of morning civil twilight, providing enough natural light for most, outdoor activities without artificial lighting. It typically occurs roughly 20-30 minutes before actual sunrise.
Sunrise 06:24 AM?Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning. It marks the end of the twilight phase, often accompanied by distinct atmospheric colors.

Daylight: 12 Hours 27 Minutes?Daylight hours are the period of time between local sunrise and sunset, representing the daily portion of sunlight. These hours change in length based on season, Earth's tilt, and latitude.

Sunset 6:51 PM?The sunset is defined in astronomy as the moment the upper limb of the Sun disappears below the horizon. It marks the end of daylight and is often accompanied by distinct atmospheric colors. It also signals the beginning of twilight.
Civil Sunset 7:19 PM?Civil sunset (or evening civil twilight) occurs when the center of the sun is 6° below the horizon, marking the end of the brightest twilight phase. It typically occurs roughly 20-30 minutes after sunset, providing enough light for most outdoor activities to continue without artificial light.
Nautical Sunset 7:51 PM?Nautical sunset occurs when the sun's center is 12° below the horizon, marking the end of nautical twilight. This phase, following civil twilight, allows the horizon to remain visible, enabling mariners to take accurate star sights for navigation. The sky is dark, but some ambient light remains
Astronomical Sunset 8:25 PM?Astronomical sunrise occurs when the Sun drops to 18° below the horizon. This causes the sky to enter a completly darkened state.

Civil Rise to Set: 13 Hours 23 Minutes
Nautical Rise to Set: 14 Hours 28 Minutes
Astro Rise to Set: 15 Hours 35 Minutes

Click for yearly Sun Almanac for Onset
Moon Almanac for Onset, Massachusetts
Moon Phase: Waxing Crescent
Moon Illumination: 33%
Moon Age: 5.79 Days
Moon is currently below the horizon
Distance from Moon to Earth: 250,590 miles
Upcoming Lunar Events for
Onset:
Next EventEvent TimeIllum

Moonrise:01:27 pm Thu39.3%
High Moon:05:46 pm Thu40.9%
Moonset:10:02 pm Thu42.6%
New Moon: Thu Sep 10
First Quarter: Fri Sep 18
Full Moon: Sat Sep 26
Last Quarter: Sat Oct 3
New Moon: Sat Oct 10
Click for Monthly Moon Almanac