Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Issued: 1 am 18 Jun 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
16.3° C

1.6°C warmer than normal for this time of year

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 (18 Jun):

  • Morning surf: Morning surf (18 Jun, local time) - 1.5ft (0.5m), 4s period with S swell.
  • Afternoon surf: Afternoon surf (18 Jun, local time) - 6ft (1.8m), 6s period with SSE swell.
  • Evening surf: Evening surf (18 Jun, local time) - 5ft (1.5m), 6s period with SSE swell.

The current surf forecast for Plum Island at 7AM is: 0.5m 4s primary swell from a South direction and 0.2m 8s secondary swell from a East direction, 0.2m 7s secondary swell from a South-southeast direction (forecast issued at 01:00am June 18). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (18 Jun)1.5ft (0.5m)4s
Afternoon (18 Jun)6ft (1.8m)6s
Evening (18 Jun)5ft (1.5m)6s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 4mm), mostly falling on Thu night. Warm (max 26°C on Thu afternoon, min 14°C on Sat night). Mainly fresh winds.

Thursday
18
Friday
19
Saturday
20
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
1
1
1
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)
0.6
S
4
0.5
S
4
0.5
S
4
0.9
SSE
4
1.7
SSE
6
2
SSE
6
1.5
SSE
6
1.3
SSE
7
1.1
SE
7
0.9
SSE
7
0.7
SE
8
0.6
SE
8
0.5
SE
8
0.5
SE
8
0.5
SE
8
0.4
SSE
8
0.4
SSE
8
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
8
Wave Graph
Metric surfscale
Energy kJ
12
7
6
25
173
309
186
163
106
88
57
49
29
28
28
28
27
18
14
7
7
6
6
6
Wind (km/h)
10
SSW
15
S
15
SSE
25
SSE
35
SSE
35
SSW
5
SW
15
W
20
W
30
W
25
W
25
W
25
W
25
W
25
W
20
W
25
W
25
W
25
W
25
W
25
WNW
25
WNW
15
WNW
15
WNW
Wind State
cross-off
cross
cross
cross
cross
cross-off
glassy
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
off
High Tide
2:27AM2.98m
3:10PM2.52m
3:23AM2.85m
4:06PM2.50m
4:21AM2.69m
5:04PM2.46m
Low Tide
9:28AM-0.29m
9:43PM0.11m
10:24AM-0.20m
10:43PM0.15m
11:20AM-0.09m
cloud
cloud
cloud
cloud
clear
part cloud
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:03
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:23
8:23
8:23
 mm
3
1
Temp °C
18
16
16
18
21
26
22
19
18
18
18
22
25
26
22
19
18
17
18
18
23
22
19
16
Feels °C
16
14
14
14
16
22
24
18
15
13
13
18
20
21
17
15
14
12
13
13
18
17
17
14
Swell 1
Height (m)
Direction
Period (s)
0.2
E
7
0.2
E
8
0.2
E
8
0.2
E
7
0.2
E
7
0.2
E
8
0.2
E
7
1.3
SSE
7
1.1
SE
7
0.9
SSE
7
0.7
SE
8
0.6
SE
8
0.5
SE
8
0.5
SE
8
0.5
SE
8
0.4
SSE
8
0.4
SSE
8
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
8
Energy kJ
4
5
4
4
4
4
4
163
106
88
57
49
29
28
28
28
27
18
14
7
7
6
6
6
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
7
0.1
SE
7
0.2
SSE
7
0.1
E
14
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.2
E
7
0.1
E
7
0.1
E
7
0.1
SE
14
0.1
SE
13
0.1
SE
13
0.1
SW
4
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SW
4
0.1
SE
12
Energy kJ
2
2
5
4
8
8
8
4
1
1
7
7
7
1
7
7
7
7
7
7
7
1
6
Swell 3
Height (m)
Direction
Period (s)
0.1
E
15
0.1
E
15
0.1
E
15
0.1
S
14
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.1
E
7
0.1
E
7
0.1
E
7
0.1
SE
13
0.1
E
7
0.1
E
7
0.1
E
7
0.1
E
6
0.1
E
6
0.1
SE
13
0.1
SE
13
0.1
SE
10
Energy kJ
4
4
4
4
8
8
8
8
1
1
1
7
1
1
1
1
1
7
6
4
Wind waves
Height (m)
Direction
Period (s)
0.6
S
4
0.5
S
4
0.5
S
4
0.9
SSE
4
1.7
SSE
6
2
SSE
6
1.5
SSE
6
0.4
WSW
3
0.8
WSW
4
0.7
WSW
4
0.6
W
4
0.4
WSW
3
0.5
W
3
0.5
W
3
0.7
WSW
4
0.7
WSW
4
0.7
WSW
4
0.7
WSW
4
0.8
W
4
0.7
W
4
0.6
WNW
4
0.4
NW
3
0.3
WNW
2
Energy kJ
12
7
6
25
173
309
186
3
14
14
9
4
5
5
14
14
14
15
18
13
8
3
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
2
1
Distance (km)
532
507
182
805
1727
574
0
0
0
129
162
4
9
377
54
118
14
155
391
166
390
391
154
154
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
4
4
4
4
1
3
2
3
3
4
3
2
4
1
2
2
3
4
4
1
3
2
3
Header Global
Rating
(10 max)
9
9
9
5
5
5
5
6
6
6
6
7
4
4
4
4
4
5
5
9
9
4
9
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
How to use the Wavefinder

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