Weather Forecast for Nantucket
Massachusetts, United States of America
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Current Weather - Nantucket: 19°C
Current Weather - Nantucket: 19°C
Massachusetts, United States of America
Sunny
Feels like 19°C
Wind
21 km/h SSE
Humidity
81%
Pressure
1016 mb
UV Index
1
Visibility
16 km
Sunny
Tuesday, July 21, 2026
High
25°C
Low
18°C
Rain Chance
72%
Hourly Forecast
25°C
25°C
25°C
25°C
24°C
25°C
22°C
22°C
23°C
23°C
23°C
Day Statistics
Maximum Wind
52 km/h
Humidity
81%
Precipitation
8 mm
UV Index
7
Visibility
10 km
Rain Chance
72%
Snow Chance
0%
Sun & Moon
Sunrise
05:25 AM
Sunset
08:08 PM
Moonrise
01:44 PM
Moonset
11:49 PM
Moon Phase
First Quarter
Moon Illumination
53%
Air Quality
PM2.5
17.2
μg/m³
PM10
24.3
μg/m³
NO₂
0.7
μg/m³
O₃
92.2
μg/m³
SO₂
0.6
μg/m³
CO
124.8
μg/m³
Light rain shower
Wednesday, July 22, 2026
High
23°C
Low
22°C
Rain Chance
89%
Hourly Forecast
22°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
23°C
22°C
22°C
22°C
23°C
22°C
23°C
23°C
22°C
22°C
22°C
22°C
22°C
22°C
Day Statistics
Maximum Wind
48 km/h
Humidity
93%
Precipitation
13 mm
UV Index
7
Visibility
10 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
05:26 AM
Sunset
08:07 PM
Moonrise
02:53 PM
Moonset
Does not set today
Moon Phase
First Quarter
Moon Illumination
64%
Air Quality
PM2.5
9.3
μg/m³
PM10
14.8
μg/m³
NO₂
0.5
μg/m³
O₃
79.9
μg/m³
SO₂
0.2
μg/m³
CO
102.5
μg/m³
Sunny
Thursday, July 23, 2026
High
22°C
Low
20°C
Rain Chance
73%
Hourly Forecast
22°C
22°C
22°C
21°C
22°C
22°C
21°C
21°C
21°C
21°C
20°C
20°C
21°C
21°C
22°C
22°C
22°C
21°C
21°C
22°C
22°C
22°C
22°C
22°C
Day Statistics
Maximum Wind
41 km/h
Humidity
75%
Precipitation
10 mm
UV Index
7
Visibility
10 km
Rain Chance
73%
Snow Chance
0%
Sun & Moon
Sunrise
05:27 AM
Sunset
08:06 PM
Moonrise
04:00 PM
Moonset
12:19 AM
Moon Phase
Waxing Gibbous
Moon Illumination
74%
Air Quality
PM2.5
6.6
μg/m³
PM10
9.4
μg/m³
NO₂
2.2
μg/m³
O₃
95.4
μg/m³
SO₂
0.4
μg/m³
CO
130
μg/m³
Sunny
Friday, July 24, 2026
High
22°C
Low
20°C
Rain Chance
4%
Hourly Forecast
22°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
20°C
20°C
20°C
Day Statistics
Maximum Wind
24 km/h
Humidity
61%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
4%
Snow Chance
0%
Sun & Moon
Sunrise
05:28 AM
Sunset
08:05 PM
Moonrise
05:03 PM
Moonset
12:56 AM
Moon Phase
Waxing Gibbous
Moon Illumination
82%
Air Quality
PM2.5
7.4
μg/m³
PM10
10.7
μg/m³
NO₂
2.4
μg/m³
O₃
75.3
μg/m³
SO₂
0.6
μg/m³
CO
106.8
μg/m³
Sunny
Saturday, July 25, 2026
High
21°C
Low
19°C
Rain Chance
5%
Hourly Forecast
19°C
19°C
20°C
19°C
19°C
20°C
20°C
20°C
21°C
20°C
20°C
20°C
20°C
20°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
21°C
20°C
20°C
Day Statistics
Maximum Wind
26 km/h
Humidity
62%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
5%
Snow Chance
0%
Sun & Moon
Sunrise
05:29 AM
Sunset
08:04 PM
Moonrise
05:59 PM
Moonset
01:40 AM
Moon Phase
Waxing Gibbous
Moon Illumination
90%
Air Quality
PM2.5
8.9
μg/m³
PM10
12.8
μg/m³
NO₂
0.7
μg/m³
O₃
84.9
μg/m³
SO₂
0.6
μg/m³
CO
157.9
μg/m³
Sunny
Sunday, July 26, 2026
High
21°C
Low
20°C
Rain Chance
3%
Hourly Forecast
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
21°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
20°C
Day Statistics
Maximum Wind
17 km/h
Humidity
58%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
3%
Snow Chance
0%
Sun & Moon
Sunrise
05:30 AM
Sunset
08:03 PM
Moonrise
06:46 PM
Moonset
02:32 AM
Moon Phase
Waxing Gibbous
Moon Illumination
95%
Sunny
Monday, July 27, 2026
High
23°C
Low
20°C
Rain Chance
9%
Hourly Forecast
20°C
20°C
20°C
20°C
21°C
21°C
21°C
21°C
21°C
21°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
23°C
23°C
22°C
22°C
22°C
Day Statistics
Maximum Wind
42 km/h
Humidity
76%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
9%
Snow Chance
0%
Sun & Moon
Sunrise
05:31 AM
Sunset
08:02 PM
Moonrise
07:26 PM
Moonset
03:30 AM
Moon Phase
Full Moon
Moon Illumination
99%
Solar Radiation Data
Shortwave Radiation
22.14
Diffuse Radiation
10.66
DNI
0
GTI
0
Weather Alerts
Gale Watch issued July 20 at 2:50PM EDT until July 22 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 5 to 8 feet possible. * WHERE...In Massachusetts coastal waters, Nantucket Sound, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility.
Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas.
Small Craft Advisory issued July 21 at 3:45AM EDT until July 22 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Southwest winds 20 to 30 kt with gusts up 30-34 kt and seas 4 to 6 feet expected. * WHERE...In Massachusetts coastal waters, Nantucket Sound, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound. * WHEN...From 8 PM this evening to 8 PM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
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