Nantucket, MA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Nantucket, MA.

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Current Conditions — Nantucket, MA

NANTUCKET (KACK)

Cloudy

44.6 F
Humidity:70%
Wind Speed:S 17.3 mph
Barometer:30.08 in
Dewpoint:35.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:37.2 F
Apr 22 2026, 06:25 PM EDT
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5-Day Forecast — Nantucket, MA

Wednesday

High 48 °F
Chance of Rain Showers
Wednesday
Night
Low 44 °F
Chance of Rain
Thursday

High 53 °F
Slight Chance of Rain Showers
Thursday
Night
Low 41 °F
Slight Chance of Showers
Friday

High 50 °F
Mostly Sunny
Friday
Night
Low 41 °F
Partly Cloudy
Saturday

High 48 °F
Partly Sunny
Saturday
Night
Low 41 °F
Mostly Cloudy
Sunday

High 51 °F
Mostly Cloudy

Detailed Forecast — Nantucket, MA

Wednesday
Chance of Rain Showers. High near 48°F. Wind 12 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
Chance of Rain. Low around 44°F. Wind 5 to 12 mph, with gusts as high as 17 mph.
Thursday
Slight Chance of Rain Showers. High near 53°F. Wind 5 to 10 mph, with gusts as high as 13 mph.
Thursday Night
Slight Chance of Showers. Low around 41°F. Wind 6 to 8 mph, with gusts as high as 12 mph.
Friday
Mostly Sunny. High near 50°F. Wind 6 to 9 mph, with gusts as high as 13 mph.
Friday Night
Partly Cloudy. Low around 41°F. Wind 5 to 6 mph, with gusts as high as 8 mph.
Saturday
Partly Sunny. High near 48°F. Wind 8 to 10 mph, with gusts as high as 13 mph.
Saturday Night
Mostly Cloudy. Low around 41°F. Wind 3 to 5 mph, with gusts as high as 7 mph.
Sunday
Mostly Cloudy. High near 51°F. Wind 6 to 9 mph, with gusts as high as 10 mph.
Sunday Night
Mostly Cloudy. Low around 44°F. Wind around 7 mph, with gusts as high as 9 mph.
Monday
Slight Chance of Rain Showers. High near 51°F. Wind 9 to 13 mph, with gusts as high as 16 mph.
Monday Night
Slight Chance of Showers. Low around 44°F. Wind around 9 mph, with gusts as high as 14 mph.
Tuesday
Chance of Showers. High near 55°F. Wind 12 to 14 mph, with gusts as high as 18 mph.
MA Radar
Current Radar • MA
Day 1 Outlook • April 22, 2026

Observation History — Nantucket, MA

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
06:25 PM EDT S 17.3 10.00 Cloudy -- 44.6 35.6 70% 37.2 NA 30.08 1018.6
06:05 PM EDT S 18.4 10.00 Cloudy -- 44.6 35.6 70% 36.9 NA 30.09 1019.0
05:50 PM EDT S 17.3 G 24.2 10.00 Cloudy -- 44.6 35.6 70% 37.2 NA 30.09 1019.0
05:45 PM EDT S 17.3 10.00 Cloudy -- 44.6 35.6 70% 37.2 NA 30.10 1019.3
05:30 PM EDT S 18.4 10.00 Cloudy -- 44.6 35.6 70% 36.9 NA 30.10 1019.3
05:20 PM EDT S 17.3 G 24.2 10.00 Cloudy -- 44.6 35.6 70% 37.2 NA 30.10 1019.3
05:00 PM EDT S 16.1 10.00 Cloudy -- 44.6 35.6 70% 37.4 NA 30.10 1019.3
04:50 PM EDT S 18.4 10.00 Cloudy -- 44.6 35.6 70% 36.9 NA 30.11 1019.6
04:30 PM EDT S 16.1 10.00 Cloudy -- 44.6 35.6 70% 37.4 NA 30.11 1019.6
04:15 PM EDT 15.0 10.00 Cloudy -- 44.6 35.6 70% 37.8 NA 30.12 1020.0
04:00 PM EDT S 18.4 10.00 Cloudy -- 44.6 35.6 70% 36.9 NA 30.12 1020.0
03:50 PM EDT S 18.4 10.00 Cloudy -- 44.6 33.8 66% 36.9 NA 30.13 1020.3
03:35 PM EDT S 17.3 10.00 Cloudy -- 44.6 33.8 66% 37.2 NA 30.14 1020.7
03:20 PM EDT S 17.3 10.00 Cloudy -- 44.6 35.6 70% 37.2 NA 30.15 1021.0
03:15 PM EDT S 17.3 10.00 Cloudy -- 44.6 33.8 66% 37.2 NA 30.15 1021.0
03:00 PM EDT S 16.1 10.00 Cloudy -- 44.6 33.8 66% 37.4 NA 30.16 1021.3
02:35 PM EDT S 18.4 10.00 Cloudy -- 44.6 33.8 66% 36.9 NA 30.17 1021.7
02:25 PM EDT S 17.3 10.00 Cloudy -- 44.6 33.8 66% 37.2 NA 30.17 1021.7
02:15 PM EDT S 17.3 10.00 Cloudy -- 44.6 33.8 66% 37.2 NA 30.17 1021.7
02:00 PM EDT S 18.4 10.00 Cloudy -- 44.6 33.8 66% 36.9 NA 30.18 1022.0
01:40 PM EDT S 16.1 G 21.9 10.00 Cloudy -- 44.6 33.8 66% 37.4 NA 30.19 1022.4
01:25 PM EDT S 16.1 10.00 Cloudy -- 44.6 33.8 66% 37.4 NA 30.19 1022.4
01:20 PM EDT S 17.3 10.00 Cloudy -- 44.6 33.8 66% 37.2 NA 30.19 1022.4
01:15 PM EDT S 18.4 10.00 Cloudy -- 44.6 33.8 66% 36.9 NA 30.19 1022.4

Regional Weather Observation

NANTUCKET (KACK)

Cloudy
44.6 F

CHATHAM (KCQX)

Cloudy
42.8 F

FALMOUTH/OTIS AB (KFMH)

Cloudy
44.6 F

PLYMOUTH (KPYM)

Cloudy
44.6 F

MARTHAS VINEYARD (KMVY)

Cloudy
44.6 F

HYANNIS (KHYA)

Cloudy
44.6 F
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