Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Issued: 1 am 20 Jun 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
15.7° C

Slightly warmer than usual

Plum Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Plum Island today (20 Jun):

  • Morning surf: Morning surf (20 Jun, local time) - 1ft (0.3m), 8s period with SSE swell.
  • Afternoon surf: Afternoon surf (20 Jun, local time) - 0.5ft (0.2m), 8s period with SSE swell.
  • Evening surf: Evening surf (20 Jun, local time) - 0.5ft (0.2m), 9s period with SSE swell.

The current surf forecast for Plum Island at 8AM is: 0.3m 8s primary swell from a South-southeast direction and 0.1m 13s secondary swell from a Southeast direction (forecast issued at 01:00am June 20). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (EDT) & DateWave HeightWave Period
Morning (20 Jun)1ft (0.3m)8s
Afternoon (20 Jun)0.5ft (0.2m)8s
Evening (20 Jun)0.5ft (0.2m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 33mm), heaviest during Mon night. Warm (max 23°C on Sat afternoon, min 14°C on Sat night). Wind will be generally light.

Saturday
20
Sunday
21
Monday
22
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
11 AM
2 PM
5 PM
8 PM
11 PM
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 Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
8
0.3
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
10
0.3
SE
10
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
5
0.1
SE
12
0.1
SE
12
0.2
SSE
7
0.2
SSE
7
0.2
SSE
7
0.1
SE
11
0.1
SE
11
0.7
SE
4
Wave Graph
Metric surfscale
Energy kJ
19
18
14
7
7
7
6
10
15
8
8
7
7
6
6
3
6
5
5
5
5
5
5
18
Wind (km/h)
25
W
30
W
25
W
20
WNW
25
NW
20
NW
15
W
15
W
10
W
10
W
15
WNW
10
WNW
10
ESE
10
ESE
5
SSE
10
WNW
10
WNW
10
WNW
5
NW
5
SE
15
S
10
SSW
10
SSE
15
ESE
Wind State
off
off
off
off
cross-off
cross-off
off
off
off
off
off
off
cross-on
on
glassy
off
off
off
glassy
glassy
cross-off
cross-off
cross
on
High Tide
4:21AM2.69m
5:04PM2.46m
5:20AM2.51m
6:01PM2.42m
6:22AM2.34m
7:00PM2.39m
Low Tide
11:20AM-0.09m
11:45PM0.18m
12:16PM0.02m
00:47AM0.20m
1:13PM0.11m
clear
part cloud
clear
clear
cloud
part cloud
thunderstorm
clear
cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
mod rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:03
5:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:23
8:24
8:24
 mm
1
1
5
8
9
Temp °C
18
17
18
21
23
23
19
17
15
14
17
22
21
20
21
19
18
16
17
21
21
16
15
14
Feels °C
13
12
14
17
18
20
18
16
14
13
15
21
20
19
21
18
17
15
17
21
19
16
15
13
Swell 1
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
8
0.3
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
10
0.3
SE
10
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
SSE
5
0.2
SSE
5
0.2
SSE
5
0.2
SSE
7
0.2
SSE
7
0.2
SSE
7
0.1
SE
6
0.1
SE
6
0.1
SE
11
Energy kJ
19
18
14
7
7
7
6
10
15
8
8
7
7
6
6
3
3
3
5
5
4
2
2
5
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SW
4
0.1
SE
13
0.1
SE
13
0.1
SE
12
0.1
SE
12
0.2
SSE
10
0.1
SE
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
SE
12
0.2
S
3
0.1
SE
7
0.1
SE
7
0.1
SE
7
0.1
SE
12
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
9
Energy kJ
7
7
7
1
7
6
6
6
9
6
3
3
3
6
1
2
2
2
5
5
5
5
5
3
Swell 3
Height (m)
Direction
Period (s)
0.1
E
7
0.1
E
6
0.1
E
6
0.1
SE
13
0.1
SE
13
0.1
SW
4
0.1
SE
10
0.1
SE
12
0.1
E
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
S
9
Energy kJ
1
1
1
7
7
1
4
6
3
6
6
6
5
2
Wind waves
Height (m)
Direction
Period (s)
0.7
WSW
4
0.8
WSW
4
0.8
W
4
0.6
W
4
0.5
W
3
0.6
NW
4
0.5
NW
3
0.3
WNW
3
0.3
W
3
0.3
W
3
0.3
WSW
3
0.3
SSE
3
0.3
SSE
3
0.7
SE
4
Energy kJ
14
19
18
9
6
10
5
2
1
1
1
2
2
18
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
Distance (km)
155
155
427
391
163
163
145
118
118
152
166
166
406
351
339
152
211
231
231
231
3519
1999
1891
2563
Best forecast wave conditions in Massachusetts
Rating
(10 max)
2
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
2
2
4
3
2
3
3
3
3
3
3
2
1
1
3
3
3
2
2
2
2
2
Header Global
Rating
(10 max)
5
5
5
5
5
8
9
9
9
8
7
7
8
7
7
6
6
8
6
5
5
5
5
5
  • 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
How to use the Wavefinder 

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