Plum Island surf break

Plum Island surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 pm Wednesday 20 May 2026 EDT
Forecast update in hr  min  s Forecast update imminent
Plum Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Plum Island sea temperature is
10.0° C
(Which is normal for this time of year)

How big are the waves at Plum Island today?

The current surf forecast for Plum Island at 9PM is: 0.5m 9s primary swell from a Southeast direction and 0.1m 12s secondary swell from a East direction (forecast issued at 01:00pm May 20). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (20 May)1.5ft (0.4m)8s
Afternoon (20 May)1.5ft (0.4m)9s
Evening (20 May)1.5ft (0.5m)9s

Table - waves today at Plum Island. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 30°C on Wed afternoon, min 11°C on Thu night). Wind will be generally light.

Wed
20
Thursday
21
Friday
22
Sat
23
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.5
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
27
28
29
41
21
29
29
28
28
12
12
12
13
13
13
13
13
14
15
15
15
15
15
15
Wind (km/h)
25
W
25
WNW
20
W
15
WNW
15
NW
15
NW
15
NNW
5
NNE
10
E
5
SE
10
SSE
10
SSW
5
W
15
NNE
10
N
10
N
10
E
15
SE
20
SSE
20
S
15
SW
5
WSW
5
WSW
5
N
off
off
off
off
cross-off
cross-off
cross-off
cross-on
on
cross-on
cross
cross-off
glassy
cross
cross
cross
on
cross-on
cross
cross
cross-off
cross-off
off
glassy
High Tide
3:22PM2.48m
3:37AM2.87m
4:21PM2.42m
4:37AM2.73m
5:24PM2.38m
5:40AM2.57m
Low Tide
9:42AM-0.28m
9:54PM0.16m
10:41AM-0.17m
10:58PM0.24m
11:43AM-0.06m
00:05AM0.28m
clear
part cloud
clear
clear
cloud
cloud
part cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:02
8:04
8:05
8:06
Temp °C
29
30
29
25
20
16
14
13
12
13
15
14
13
11
11
11
13
15
15
15
14
13
13
13
27
28
27
23
17
12
10
10
9
11
11
10
11
6
7
7
9
10
9
9
9
10
11
11
Swell 1
Height (m)
Direction
Period (s)
0.5
S
5
0.4
SE
9
0.4
SE
9
0.5
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.6
NE
4
0.4
NE
4
0.3
SE
9
0.3
SE
9
0.3
SSE
3
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SSW
3
0.3
SE
10
0.3
SE
10
Energy kJ
11
28
29
41
21
29
29
28
28
12
4
12
13
2
13
13
13
14
15
15
15
4
15
15
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SSE
5
0.3
SSE
5
0.1
E
12
0.3
SSE
6
0.1
E
14
0.3
NNE
4
0.1
E
14
0.1
E
14
0.3
SE
9
0.3
SE
9
0.3
NE
4
0.3
SE
9
0.2
SSE
3
0.1
SE
5
0.3
NE
3
0.2
NNE
3
0.1
SE
13
0.1
SE
13
0.3
SE
10
0.3
S
3
0.2
S
3
Energy kJ
27
10
5
3
6
4
4
4
4
12
12
2
13
1
1
2
1
7
7
15
2
1
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
12
0.1
SE
12
0.1
E
12
0.1
E
14
0.2
WSW
4
0.1
E
15
0.1
E
14
0.1
E
14
0.1
NE
5
0.1
S
6
0.1
S
5
0.1
SE
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
SE
13
0.1
SE
13
0.1
E
13
0.1
E
13
Energy kJ
6
6
3
4
1
4
4
4
1
1
1
7
3
3
3
7
7
4
4
Wind waves
Height (m)
Direction
Period (s)
0.4
WSW
3
0.4
WSW
3
0.5
W
3
0.5
W
3
0.5
NW
3
0.4
NNW
3
0.6
N
4
0.5
NE
5
0.7
NE
5
0.1
SE
6
0.4
SSE
3
0.4
SSE
3
0.4
SSE
3
0.4
NE
3
0.4
NE
3
0.3
NNE
3
0.4
S
3
0.5
SSW
3
0.4
SSW
3
Energy kJ
3
3
5
5
5
4
15
10
21
1
2
3
3
2
3
2
2
6
5
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
377
54
351
118
120
146
169
169
170
272
319
626
231
319
260
895
863
863
854
868
855
635
772
772
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
3
1
2
1
1
1
3
1
3
1
1
1
2
2
2
2
1
1
1
1
2
2
2
Header Global
Rating
(10 max)
4
5
5
5
5
5
5
5
5
5
4
4
5
7
8
7
6
5
5
5
5
6
8
9
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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