Plum Island surf break

Plum Island surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 am 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 1PM is: 0.4m 9s primary swell from a Southeast direction and 0.3m 5s secondary swell from a South-southeast direction (forecast issued at 07:00am May 20). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be 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 (0.4m)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 29°C on Wed afternoon, min 11°C on Thu night). Wind will be generally light.

Wednesday
20
Thursday
21
Friday
22
Sat
23
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
11 AM
2 PM
5 PM
8 PM
11 PM
2 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
8
0.4
SE
8
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
0.8
NE
5
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
Wave Graph
Metric surfscale
Energy kJ
23
25
27
28
41
29
21
29
29
28
25
12
12
12
13
13
13
13
13
14
15
15
15
15
Wind (km/h)
15
SW
15
WSW
25
W
25
W
20
W
15
W
15
NW
15
NW
15
NNW
5
NE
15
ESE
10
SSE
10
S
10
S
5
WNW
15
NNE
10
N
10
N
10
E
15
SE
20
SSE
20
S
15
SW
5
WSW
cross-off
cross-off
off
off
off
off
cross-off
cross-off
cross-off
cross-on
on
cross-on
cross
cross
glassy
cross
cross
cross
on
cross-on
cross
cross
cross-off
off
High Tide
2:40AM2.98m
3:22PM2.48m
3:37AM2.87m
4:21PM2.42m
4:37AM2.73m
5:24PM2.38m
Low Tide
9:42AM-0.28m
9:54PM0.16m
10:41AM-0.17m
10:58PM0.24m
11:43AM-0.06m
00:05AM0.28m
clear
clear
part cloud
part cloud
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
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
21
23
28
29
28
25
19
17
15
13
12
12
14
14
12
11
11
11
14
15
15
15
14
13
21
23
26
27
25
23
16
13
11
11
9
9
11
10
10
6
7
7
10
9
9
9
9
10
Swell 1
Height (m)
Direction
Period (s)
0.4
SE
8
0.6
S
5
0.4
S
4
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
0.6
NE
4
0.4
NE
4
0.3
SE
9
0.4
SSE
3
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
0.4
SSW
4
Energy kJ
23
15
6
28
41
29
21
29
29
28
12
12
5
12
3
13
13
13
13
14
15
15
15
5
Swell 2
Height (m)
Direction
Period (s)
0.1
E
16
0.4
SE
8
0.4
SE
9
0.3
SSE
5
0.1
SE
12
0.1
E
12
0.2
SSE
6
0.1
E
14
0.1
E
14
0.1
E
14
0.1
SE
6
0.3
SE
9
0.3
SE
9
0.3
NE
4
0.3
SE
9
0.3
SSE
3
0.2
SSE
3
0.1
E
13
0.2
NNE
3
0.2
NNE
3
0.1
SE
13
0.1
SE
13
0.3
SE
10
Energy kJ
5
25
27
5
6
3
3
4
4
4
1
12
12
2
13
2
1
3
1
1
7
7
15
Swell 3
Height (m)
Direction
Period (s)
0.1
E
12
0.1
E
16
0.2
SSE
6
0.1
SE
12
0.1
E
15
0.1
E
14
0.1
E
14
0.1
E
14
0.1
SE
6
0.1
E
14
0.1
E
15
0.2
ENE
4
0.1
S
5
0.1
SE
13
0.1
SE
13
0.1
E
13
0.1
E
13
0.1
SE
13
0.1
SE
13
Energy kJ
3
5
3
6
4
4
4
4
1
4
4
1
1
7
7
3
3
7
7
Wind waves
Height (m)
Direction
Period (s)
0.7
S
5
0.4
WSW
3
0.4
WSW
3
0.5
W
3
0.5
W
3
0.5
W
3
0.4
WNW
3
0.4
NNW
3
0.4
N
4
0.5
NE
4
0.8
NE
5
0.3
SSE
2
0.4
SSE
3
0.3
S
3
0.3
NE
2
0.4
NNE
3
0.4
NE
3
0.4
NNE
3
0.3
S
2
0.6
S
3
0.6
SSW
4
0.3
WSW
4
Energy kJ
21
4
3
5
5
5
4
4
5
9
25
1
2
1
1
4
3
4
1
7
10
2
Nearest Offshore or Glassy
Rating
(10 max)
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
9
182
377
54
54
118
170
182
169
4
170
170
319
626
342
319
307
941
922
895
872
868
633
319
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
3
2
4
1
1
1
3
1
3
1
3
1
1
2
2
2
2
3
2
1
2
3
3
Header Global
Rating
(10 max)
4
4
4
5
5
5
5
5
5
5
5
5
4
5
5
7
7
7
6
5
5
5
5
6
  • 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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