Water Temperature of Nantucket Sound in Nantucket, MA

Current Water Temperature

73.4°F

Measurement Time: Saturday, July 18, 2026, 8:24 PM EDT

Today's Tides

 High: July 18, 3:48 AM, 3.9 ft
Low: July 18, 9:42 AM, -0.1 ft
 High: July 18, 4:25 PM, 3.5 ft
Low: July 18, 10:03 PM, 0.2 ft

Temperature Locations

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Local Points of Interest

Nantucket Island; Nantucket Terminal; Head of the Harbor; Atlantic Ocean

Nantucket Sound

Station Name: Nantucket Island
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 0 feet

Sensor Depth: -2 feet

Nearest Address:
20 Old N Wharf
Nantucket, MA 02554
Nantucket County

GPS Coordinates: 41.285278, -70.096390

Nearby Water Temperatures

Nantucket Sound, West Yarmouth, MA (17.2 mi)
Pleasant Bay, Chatham, MA (28.9 mi)
Childs River, Waquoit Village, MA (30.5 mi)
Woods Hole, Woods Hole, MA (34 mi)
Herring River, Wellfleet, MA (44.7 mi)
Atlantic Ocean, New Shoreham, RI (57.9 mi)
Taunton River, Fall River, MA (62.4 mi)
Taunton River, Bridgewater, MA (63.1 mi)
Atlantic Ocean, Provincetown, MA (63.5 mi)
Narragansett Bay, Newport, RI (65.5 mi)
Mill River, Taunton, MA (66.6 mi)
Atlantic Ocean, Nantucket, MA (70.2 mi)
Providence River, Barrington, RI (71.1 mi)
Great Harbor, North Kingstown, RI (71.2 mi)
Providence River, Providence, RI (76.5 mi)

Weather for Nantucket, Massachusetts

Current Weather

70°F
Mist
Mist
70°F
76.2°F
97%
SSW 26.4 mph
44.4 mph
71.6°F
69.5°F
0.08 in
100%
2 mi
1008 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 77°F
L: 66°F
Sunny
Sun
H: 73°F
L: 71°F
Sunny
Mon
H: 73°F
L: 70°F
Sunny
Tue
H: 73°F
L: 71°F
Patchy rain nearby
Wed
H: 74°F
L: 71°F

Air Quality

AQI: 1 - Good
PM2.5: 50.5 μg/m3
PM10: 58.9 μg/m3
Carbon Monoxide: 145 μg/m3
Nitrogen Dioxide: 0.4 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 112 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:46 AM
Sunset: 8:10 PM
Daylight: 14 hrs 48 mins
Moonrise: 10:18 AM
Moon Transit: 4:33 PM
Moonset: 10:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
4:03 PM - 6:33 PM

Minor Periods

10:07 PM - 11:37 PM
9:48 AM - 11:18 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 18 at 1:36AM EDT until July 19 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Sat July 18, 2026, 1:36 AM
Expires: Sat July 18, 2026, 8:00 PM

* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 6 feet expected. * WHERE...In Massachusetts coastal waters, Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM and Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket. In Rhode Island coastal waters, Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island. * WHEN...From 11 AM this morning to 8 PM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 18 at 12:41PM EDT until July 19 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Sat July 18, 2026, 12:41 PM
Expires: Sun July 19, 2026, 11:00 AM

* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 6 feet. * WHERE...In Massachusetts coastal waters, Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM and Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket. In Rhode Island coastal waters, Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island. * WHEN...Until 8 PM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, July 18, 2026

Weather Forecast

Sunny
77°F
66.2°F
71.6°F
84%
0.19 in
72%
0%
28.2 mph
5.9


Air Quality

AQI: 2 - Moderate
PM2.5: 24.7 μg/m3
PM10: 31.79 μg/m3
Carbon Monoxide: 127.13 μg/m3
Nitrogen Dioxide: 0.68 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 103.67 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:46 AM
Sunset: 8:10 PM
Daylight: 14 hrs 48 mins
Moonrise: 10:18 AM
Moon Transit: 4:33 PM
Moonset: 10:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
4:03 PM - 6:33 PM

Minor Periods

10:07 PM - 11:37 PM
9:48 AM - 11:18 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
72.8°F
70.5°F
71.8°F
77%
0.03 in
43%
0%
26.8 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 10.68 μg/m3
PM10: 13.93 μg/m3
Carbon Monoxide: 164.92 μg/m3
Nitrogen Dioxide: 1.76 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 114.17 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:46 AM
Sunset: 8:09 PM
Daylight: 14 hrs 46 mins
Moonrise: 11:25 AM
Moon Transit: 5:16 PM
Moonset: 10:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

7:09 AM - 9:39 AM
4:46 PM - 7:16 PM

Minor Periods

10:28 PM - 11:58 PM
10:55 AM - 12:25 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
72.5°F
70.1°F
71.1°F
63%
0 in
5%
0%
15.2 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 6.49 μg/m3
PM10: 8.72 μg/m3
Carbon Monoxide: 115.04 μg/m3
Nitrogen Dioxide: 2.29 μg/m3
Sulphur Dioxide: 0.52 μg/m3
Ozone: 85.08 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 12:46 AM
Sunset: 8:09 PM
Daylight: 14 hrs 44 mins
Moonrise: 12:31 AM
Moon Transit: 6:00 PM
Moonset: 11:20 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:52 AM - 10:22 AM
5:30 PM - 8:00 PM

Minor Periods

12:00 AM - 12:00 AM
12:01 AM - 1:31 PM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
72.8°F
70.8°F
71.3°F
83%
0.02 in
41%
0%
22.1 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 11.48 μg/m3
PM10: 17.8 μg/m3
Carbon Monoxide: 124.5 μg/m3
Nitrogen Dioxide: 0.68 μg/m3
Sulphur Dioxide: 0.43 μg/m3
Ozone: 90.46 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 12:46 AM
Sunset: 8:08 PM
Daylight: 14 hrs 43 mins
Moonrise: 1:36 PM
Moon Transit: 6:44 PM
Moonset: 12:20 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:36 AM - 11:06 AM
6:14 PM - 8:44 PM

Minor Periods

1:06 PM - 2:36 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Patchy rain nearby
73.8°F
71.1°F
72.5°F
92%
0.26 in
83%
0%
31.8 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 8.53 μg/m3
PM10: 14.32 μg/m3
Carbon Monoxide: 115.89 μg/m3
Nitrogen Dioxide: 0.4 μg/m3
Sulphur Dioxide: 0.18 μg/m3
Ozone: 76.44 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 12:46 AM
Sunset: 8:07 PM
Daylight: 14 hrs 41 mins
Moonrise: 2:41 PM
Moon Transit: 7:30 PM
Moonset: 12:44 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

9:21 AM - 11:51 AM
7:00 PM - 9:30 PM

Minor Periods

2:11 PM - 3:41 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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