Water Temperature of Nantucket Sound in West Yarmouth, MA

Current Water Temperature

56.3°F

Measurement Time: Tuesday, May 19, 2026, 7:10 AM EDT

Temperature Locations

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Local Points of Interest

Atlantic Ocean

Nantucket Sound

Station Name: NANTUCKET SOUND
Station Type: Other
Data Source: National Data Buoy Center

Elevation Above Sea Level: 0 feet

Nearest Address:
973–1019 Great Island Rd
West Yarmouth, MA 02673
Barnstable County

GPS Coordinates: 41.493, -70.279

Nearby Water Temperatures

Childs River, Waquoit Village, MA (14.3 mi)
Nantucket Sound, Nantucket, MA (17.2 mi)
Woods Hole, Woods Hole, MA (20.4 mi)
Pleasant Bay, Chatham, MA (21.7 mi)
Herring River, Wellfleet, MA (32.2 mi)
Taunton River, Bridgewater, MA (46.4 mi)
Taunton River, Fall River, MA (48 mi)
Atlantic Ocean, Provincetown, MA (49.5 mi)
Mill River, Taunton, MA (50.4 mi)
Narragansett Bay, Newport, RI (54.2 mi)
Atlantic Ocean, New Shoreham, RI (57.1 mi)
Providence River, Barrington, RI (57.1 mi)
Great Harbor, North Kingstown, RI (58.8 mi)
Providence River, Providence, RI (61.9 mi)
Atlantic Ocean, Scituate, MA (62 mi)

Weather for West Yarmouth, Massachusetts

Current Weather

70°F
Cloudy
Cloudy
70°F
65.2°F
73%
SW 16.1 mph
29.1 mph
65.2°F
63.2°F
0 in
0%
9 mi
1018 mbar
5.2

Five Day Weather Forecast

Partly Cloudy
Tue
H: 72°F
L: 59°F
Moderate rain
Wed
H: 73°F
L: 61°F
Partly Cloudy
Thu
H: 56°F
L: 51°F
Sunny
Fri
H: 59°F
L: 50°F
Partly Cloudy
Sat
H: 59°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 13.05 μg/m3
PM10: 17.95 μg/m3
Carbon Monoxide: 143.85 μg/m3
Nitrogen Dioxide: 2.35 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 111 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:37 AM
Sunset: 7:58 PM
Daylight: 14 hrs 39 mins
Moonrise: 7:30 AM
Moon Transit: 3:40 PM
Moonset: 11:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

5:23 AM - 7:53 AM
3:10 PM - 5:40 PM

Minor Periods

12:00 AM - 12:00 AM
7:00 AM - 8:30 AM

Action Rating: 3 out of 5

Heat Advisory issued May 19 at 1:59AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Tue May 19, 2026, 1:59 AM
Expires: Tue May 19, 2026, 5:00 PM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM this morning to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Air Quality Alert issued May 18 at 11:21PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 11:21 PM
Expires: Tue May 19, 2026, 11:15 PM

The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups. Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity. For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/dep/massair/forecast


Tuesday, May 19, 2026

Weather Forecast

Partly Cloudy
71.6°F
59.2°F
64°F
91%
0 in
0%
0%
19.7 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 12.79 μg/m3
PM10: 17.27 μg/m3
Carbon Monoxide: 146.33 μg/m3
Nitrogen Dioxide: 3.51 μg/m3
Sulphur Dioxide: 1.64 μg/m3
Ozone: 105.2 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:37 AM
Sunset: 7:58 PM
Daylight: 14 hrs 39 mins
Moonrise: 7:30 AM
Moon Transit: 3:40 PM
Moonset: 11:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

5:23 AM - 7:53 AM
3:10 PM - 5:40 PM

Minor Periods

12:00 AM - 12:00 AM
7:00 AM - 8:30 AM

Action Rating: 3 out of 5

Wednesday, May 20, 2026

Weather Forecast

Moderate rain
72.7°F
60.8°F
65.7°F
82%
0.74 in
84%
0%
20.6 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 12.53 μg/m3
PM10: 16.53 μg/m3
Carbon Monoxide: 139.97 μg/m3
Nitrogen Dioxide: 4.38 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 117.6 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:37 AM
Sunset: 7:58 PM
Daylight: 14 hrs 41 mins
Moonrise: 8:47 AM
Moon Transit: 4:42 PM
Moonset: 12:44 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

6:27 AM - 8:57 AM
4:12 PM - 6:42 PM

Minor Periods

8:17 AM - 9:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Partly Cloudy
56.2°F
51°F
54.8°F
64%
0 in
0%
0%
16.1 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 4.27 μg/m3
PM10: 5.25 μg/m3
Carbon Monoxide: 137.09 μg/m3
Nitrogen Dioxide: 4.46 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 81.84 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:37 AM
Sunset: 7:59 PM
Daylight: 14 hrs 43 mins
Moonrise: 10:05 AM
Moon Transit: 5:39 PM
Moonset: 12:27 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

7:25 AM - 9:55 AM
5:09 PM - 7:39 PM

Minor Periods

9:35 AM - 11:05 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Sunny
58.7°F
50.4°F
54.6°F
63%
0 in
0%
0%
10.5 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 7.09 μg/m3
PM10: 9.99 μg/m3
Carbon Monoxide: 138.95 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 84.2 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:37 AM
Sunset: 8:00 PM
Daylight: 14 hrs 45 mins
Moonrise: 11:20 AM
Moon Transit: 6:30 PM
Moonset: 1:00 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

8:18 AM - 10:48 AM
6:00 PM - 8:30 PM

Minor Periods

10:50 AM - 12:20 AM
12:30 AM - 2:00 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Partly Cloudy
59.1°F
51.2°F
55.3°F
67%
0 in
0%
0%
11.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 7.62 μg/m3
PM10: 10.7 μg/m3
Carbon Monoxide: 132.39 μg/m3
Nitrogen Dioxide: 3.71 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 79.69 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:37 AM
Sunset: 8:01 PM
Daylight: 14 hrs 46 mins
Moonrise: 12:31 AM
Moon Transit: 7:16 PM
Moonset: 1:27 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

9:06 AM - 11:36 AM
6:46 PM - 9:16 PM

Minor Periods

12:01 AM - 1:31 PM
12:57 AM - 2:27 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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