Deer Island, MA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sat
Jul 4 		PM Showers
Close Hourly 		90º / 70º 35% WNW 12 mph 56%
4am Clear 81º 1% W 9 mph 65%
5am Clear 79º 1% W 8 mph 68%
6am Sunny 79º 1% W 8 mph 69%
7am Sunny 79º 1% W 8 mph 68%
8am Mostly Sunny 82º 1% WNW 9 mph 64%
9am Mostly Sunny 84º 1% WNW 9 mph 59%
10am Partly Cloudy 85º 0% WNW 9 mph 55%
11am Partly Cloudy 87º 0% WNW 10 mph 51%
12pm Partly Cloudy 89º 15% WNW 11 mph 48%
1pm Partly Cloudy 90º 15% WNW 12 mph 46%
2pm Mostly Cloudy 90º 15% WNW 12 mph 45%
3pm Mostly Cloudy 89º 15% WNW 11 mph 46%
4pm Showers 88º 35% WNW 10 mph 46%
5pm Few Showers 85º 31% NW 11 mph 55%
6pm Mostly Cloudy 85º 18% NW 8 mph 52%
7pm Mostly Cloudy 83º 22% WNW 8 mph 58%
8pm Cloudy 81º 17% NW 6 mph 62%
9pm Cloudy 80º 15% NNW 5 mph 65%
10pm Cloudy 79º 24% NW 6 mph 68%
11pm Showers 77º 37% NW 7 mph 68%
Sun
Jul 5 		Partly Cloudy
View Hourly 		77º / 67º 2% ENE 11 mph 57%
12am Cloudy 77º 15% NNW 7 mph 64%
1am Cloudy 76º 15% NNW 7 mph 63%
2am Cloudy 75º 2% N 7 mph 65%
3am Mostly Cloudy 74º 2% N 6 mph 65%
4am Partly Cloudy 73º 3% N 5 mph 68%
5am Partly Cloudy 72º 3% N 5 mph 69%
6am Mostly Cloudy 71º 3% N 5 mph 69%
7am Mostly Cloudy 73º 3% NNE 5 mph 65%
8am Partly Cloudy 74º 2% NNE 4 mph 63%
9am Partly Cloudy 74º 2% NE 5 mph 59%
10am Partly Cloudy 76º 2% ENE 6 mph 55%
11am Partly Cloudy 77º 2% ENE 8 mph 54%
12pm Partly Cloudy 77º 2% E 9 mph 54%
1pm Partly Cloudy 77º 2% E 10 mph 53%
2pm Partly Cloudy 76º 2% E 10 mph 56%
3pm Partly Cloudy 76º 2% E 11 mph 56%
4pm Partly Cloudy 76º 2% ESE 11 mph 55%
5pm Partly Cloudy 75º 2% ESE 10 mph 55%
6pm Partly Cloudy 74º 3% ESE 9 mph 58%
7pm Partly Cloudy 73º 3% ESE 9 mph 61%
8pm Partly Cloudy 72º 4% ESE 7 mph 62%
9pm Mostly Cloudy 72º 6% SE 7 mph 64%
10pm Mostly Cloudy 72º 6% SE 7 mph 67%
11pm Mostly Cloudy 71º 7% SSE 6 mph 70%
Mon
Jul 6 		PM Light Rain
View Hourly 		71º / 65º 60% E 12 mph 72%
12am Mostly Cloudy 71º 7% S 6 mph 72%
1am Mostly Cloudy 71º 8% S 5 mph 73%
2am Cloudy 70º 8% S 4 mph 75%
3am Cloudy 70º 9% SSE 4 mph 76%
Tue
Jul 7 		Rain 69º / 63º 86% ENE 15 mph 85%
Wed
Jul 8 		Partly Cloudy 76º / 67º 24% NE 9 mph 74%
Thu
Jul 9 		Partly Cloudy 87º / 72º 7% SW 11 mph 61%
Fri
Jul 10 		Scattered Thunderstorms 83º / 70º 54% WSW 10 mph 67%
Sat
Jul 11 		Partly Cloudy 79º / 67º 24% NE 10 mph 64%

Weather Radar for Deer Island, MA See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Deer Island, MA

Independence Day
High : 93ºF
W wind 7 to 9 kt. A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Saturday Night
Low : 70ºF
NW wind 6 to 8 kt. A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 10pm. Seas 1 ft or less.
Sunday
High : 75ºF
NNE wind 6 to 9 kt becoming E in the afternoon. Mostly sunny. Seas 1 ft or less.
Sunday Night
Low : 65ºF
SE wind 5 to 7 kt becoming variable and less than 5 kt. Mostly cloudy. Seas 1 ft or less.
Monday
High : 77ºF
Variable winds less than 5 kt becoming SE 5 to 9 kt in the morning. A chance of showers, mainly after 10am. Seas 1 ft or less.
Monday Night
Low : 63ºF
ESE wind around 9 kt. Showers likely, with thunderstorms also possible after 2am. Seas 1 ft or less.
Tuesday
High : 68ºF
E wind 10 to 12 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Tuesday Night
Low : 64ºF
E wind 7 to 10 kt becoming NNE after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 1am. Seas 1 ft or less.
Wednesday
High : 72ºF
N wind around 7 kt becoming E in the afternoon. Partly sunny. Seas 1 ft or less.

NOAA Buoy Data Near Deer Island, MA See Map

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    Featured Local Businesses

    Constitution Marina with downtown Boston in the background.

    Constitution Marina
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    Wind Speed Forecast for Deer Island, MA

    SaturdaySundayMonday
    Wind Speed (MPH) 991110675491176
    8am12pm4pm8pm12am4am8am12pm4pm8pm12am4am
    MPH 991110675491176
    DIR WWNWWNWWNWNWNNWNNNEEESEESES

    Current Weather Conditions In Deer Island, MA

    As Of: 2 minutes ago

    • 81ºF
    • 84ºF
    • 9mph
    • 0º (W)
    • 9mph
    • Clear
    • 10mi
    • 29.82"
    • 65%
    • 0ºF

    The weather right now in Deer Island, MA is Clear. The current temperature is 81°F, and the expected high and low for today, Saturday, July 4, 2026, are 90° high temperature and 70°F low temperature. The wind is currently blowing at 9 miles per hour, and coming from the West. The wind is gusting to 9 mph. With the wind and the atmosphere the temperature feels like 84° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 65 percent, and air pressure at 29.82 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Heat Advisory - 2:22am Sat Jul 4 2026

    ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...EXTREME HEAT WARNING IS CANCELLED...

    WHAT: Heat index values 95 to 102 degrees.

    WHERE: All of southern New England except Nantucket.

    WHEN: Until 8 PM EDT this evening.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    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.

    &&