Forecast Details for Nantucket, MA

Recent Locations: Nantucket, MA  
This Afternoon: Mostly sunny, with a high near 55. Southwest wind around 11 mph.
Tonight: Mostly cloudy, with a low around 44. West wind around 10 mph.
Sunday: A slight chance of showers before 11am. Mostly cloudy, with a high near 54. Southwest wind 11 to 13 mph. Chance of precipitation is 20%.
Sunday Night: A slight chance of rain between 9pm and midnight. Mostly cloudy, with a low around 45. Southwest wind 7 to 10 mph. Chance of precipitation is 20%.
Monday: Partly sunny, with a high near 56. Northwest wind 9 to 11 mph becoming northeast in the afternoon.
Monday Night: Partly cloudy, with a low around 44. Northeast wind 5 to 7 mph becoming northwest after midnight.
Tuesday: Mostly cloudy, with a high near 53. Northeast wind around 11 mph.
Tuesday Night: A chance of rain after 7pm. Mostly cloudy, with a low around 43. Southeast wind around 14 mph. Chance of precipitation is 40%.
Wednesday: Mostly cloudy, with a high near 52. East wind 13 to 15 mph.
Wednesday Night: Mostly cloudy, with a low around 44. Northeast wind around 11 mph.
Thursday: Mostly sunny, with a high near 54. Northwest wind around 11 mph becoming southwest in the afternoon.
Thursday Night: Partly cloudy, with a low around 46. Southwest wind around 11 mph.
Friday: Partly sunny, with a high near 57. South wind 11 to 15 mph.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

North American Water Vapor Map

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow