Plum Island Sound, South End, MA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Fri
Jul 3 		Mostly Clear -º / 73º 2% W 6 mph 71%
Sat
Jul 4 		PM Thunderstorms
View Hourly 		90º / 66º 42% WNW 9 mph 59%
12am Partly Cloudy 82º 1% WNW 6 mph 64%
1am Partly Cloudy 81º 1% WNW 5 mph 66%
2am Partly Cloudy 80º 1% WNW 5 mph 69%
3am Partly Cloudy 77º 1% WNW 6 mph 75%
4am Mostly Clear 76º 2% W 5 mph 77%
5am Clear 75º 2% W 5 mph 79%
6am Sunny 75º 2% W 5 mph 80%
7am Sunny 78º 4% W 5 mph 78%
8am Sunny 80º 4% WNW 7 mph 72%
9am Sunny 83º 2% WNW 7 mph 64%
10am Sunny 86º 2% WNW 8 mph 58%
11am Partly Cloudy 87º 4% WNW 8 mph 56%
12pm Partly Cloudy 89º 15% WNW 9 mph 52%
1pm Mostly Cloudy 88º 15% WNW 9 mph 52%
2pm Mostly Cloudy 89º 15% WNW 8 mph 51%
3pm Mostly Cloudy 89º 15% WNW 8 mph 52%
4pm Scattered Thunderstorms 88º 43% WNW 8 mph 53%
5pm Showers 87º 40% NW 8 mph 55%
6pm Mostly Cloudy 84º 15% NW 7 mph 60%
7pm Mostly Cloudy 82º 16% NW 6 mph 64%
8pm Mostly Cloudy 80º 15% NNW 5 mph 68%
9pm Mostly Cloudy 77º 15% NNW 4 mph 73%
10pm Mostly Cloudy 75º 15% NNW 4 mph 76%
11pm Mostly Cloudy 74º 15% NNW 4 mph 77%
Sun
Jul 5 		Partly Cloudy
View Hourly 		80º / 63º 23% E 8 mph 57%
12am Mostly Cloudy 73º 15% NNW 5 mph 77%
1am Mostly Cloudy 72º 15% N 4 mph 77%
2am Partly Cloudy 71º 3% N 4 mph 75%
3am Partly Cloudy 69º 4% N 3 mph 76%
4am Partly Cloudy 68º 4% N 3 mph 77%
5am Partly Cloudy 67º 19% NNW 3 mph 78%
6am Mostly Cloudy 67º 24% NNW 3 mph 79%
7am Mostly Cloudy 70º 24% N 2 mph 75%
8am Partly Cloudy 73º 12% N 3 mph 68%
9am Mostly Cloudy 75º 4% NNE 4 mph 61%
10am Partly Cloudy 77º 2% NE 6 mph 54%
11am Mostly Cloudy 78º 2% ENE 6 mph 53%
12pm Mostly Cloudy 78º 6% ENE 6 mph 52%
1pm Mostly Cloudy 79º 1% ESE 7 mph 51%
2pm Partly Cloudy 79º 0% ESE 7 mph 50%
3pm Partly Cloudy 79º 0% SE 7 mph 52%
4pm Mostly Cloudy 78º 0% SE 8 mph 54%
5pm Partly Cloudy 77º 1% SE 8 mph 57%
6pm Mostly Cloudy 75º 1% SE 7 mph 61%
7pm Mostly Cloudy 73º 2% SE 6 mph 67%
8pm Cloudy 71º 4% SE 5 mph 72%
9pm Cloudy 70º 4% SE 3 mph 76%
10pm Cloudy 69º 5% SSE 3 mph 77%
11pm Cloudy 68º 7% SSE 2 mph 80%
Mon
Jul 6 		Cloudy 74º / 62º 11% ESE 9 mph 69%
Tue
Jul 7 		AM Showers 70º / 62º 54% E 12 mph 82%
Wed
Jul 8 		AM Showers 75º / 64º 35% NE 8 mph 77%
Thu
Jul 9 		Partly Cloudy 87º / 70º 16% SW 9 mph 64%
Fri
Jul 10 		Scattered Thunderstorms 85º / 68º 41% SW 9 mph 67%

Weather Radar for Plum Island Sound, South End, MA See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Plum Island Sound, South End, MA

Overnight
Low : 73ºF
W wind around 6 kt. Isolated showers and thunderstorms between 1am and 3am. Seas around 1 ft.
Independence Day
High : 91ºF
W wind around 7 kt. Scattered showers and thunderstorms, mainly after 2pm. Seas 1 to 2 ft.
Saturday Night
Low : 67ºF
NW wind around 6 kt becoming N after midnight. Isolated showers before 7pm. Seas around 1 ft.
Sunday
High : 81ºF
Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.
Sunday Night
Low : 65ºF
Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.
Monday
High : 77ºF
Variable winds less than 5 kt becoming SE 5 to 7 kt in the morning. A chance of showers after 2pm. Seas around 1 ft.
Monday Night
Low : 63ºF
Variable winds 5 kt or less. Showers likely, mainly after 4am. Seas around 1 ft.
Tuesday
High : 73ºF
E wind 6 to 9 kt. Showers likely. Seas 1 to 2 ft.
Tuesday Night
Low : 63ºF
Variable winds 5 kt or less. A chance of showers. Seas around 2 ft.

NOAA Buoy Data Near Plum Island Sound, South End, MA See Map

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    Wind Speed Forecast for Plum Island Sound, South End, MA

    SaturdaySundayMonday
    Wind Speed (MPH) 657985533685
    4am8am12pm4pm8pm12am4am8am12pm4pm8pm12am
    MPH 657985533685
    DIR WNWWWNWWNWWNWNNWNNWNNENESESE

    Current Weather Conditions In Plum Island Sound, South End, MA

    As Of: 14 minutes ago

    • 82ºF
    • 86ºF
    • 6mph
    • 0º (WNW)
    • 6mph
    • Partly Cloudy
    • 10mi
    • 29.82"
    • 64%
    • 0ºF

    The weather right now in Plum Island Sound, South End, MA is Partly Cloudy. The current temperature is 82°F, and the expected high and low for today, Saturday, July 4, 2026, are -° high temperature and 73°F low temperature. The wind is currently blowing at 6 miles per hour, and coming from the West Northwest. The wind is gusting to 6 mph. With the wind and the atmosphere the temperature feels like 86° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 64 percent, and air pressure at 29.82 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Extreme Heat Warning - 2:59pm Fri Jul 3 2026

    ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...

    WHAT: Dangerously hot conditions with heat index values of 100 to
    110 degrees expected today. Heat indices of 95-100+ degrees
    expected on Independence Day.

    WHERE: Portions of northern Connecticut, central, eastern,
    northeastern, southeastern, and western Massachusetts, and
    northern and southern Rhode Island.

    WHEN: Until 8 PM EDT Saturday.

    IMPACTS: Heat related illnesses increase significantly during
    extreme heat and high humidity events.

    ADDITIONAL DETAILS: This is a prolonged and dangerous heatwave
    with little relief at night.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    &&