Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 pm 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
16.6° C
2.2° 

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 (22 Jul):

  • Morning surf: Morning surf (22 Jul, local time) - 4.5ft (1.3m), 6s period with SSE swell.
  • Afternoon surf: Afternoon surf (22 Jul, local time) - 3.5ft (1.1m), 7s period with SSE swell.
  • Evening surf: Evening surf (22 Jul, local time) - 3ft (0.9m), 7s period with SSE swell.

The current surf forecast for Plum Island at 12AM is: 1.6m 6s primary swell from a South-southeast direction and 0.1m 11s secondary swell from a Southeast direction (forecast issued at 07:00pm July 21). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (22 Jul)4.5ft (1.3m)6s
Afternoon (22 Jul)3.5ft (1.1m)7s
Evening (22 Jul)3ft (0.9m)7s

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


Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue night. Warm (max 28°C on Wed afternoon, min 16°C on Wed night). Wind will be generally light.

Tue
21
Wednesday
22
Thursday
23
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
1
1
1
1
1
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
SSE
5
1.4
SSE
5
1.6
SSE
6
1.4
SSE
6
1.3
SSE
6
1.3
SSE
6
1.3
SSE
7
1.1
SSE
7
1.2
SSE
6
1.1
SE
7
0.9
SE
6
0.9
SSE
10
0.8
SE
10
0.8
SE
9
0.8
SE
8
0.7
SE
8
0.7
SE
8
0.7
SE
8
0.8
SE
8
Wave Graph
Metric surfscale
Energy kJ
61
98
162
119
115
125
145
110
113
100
61
161
110
95
80
61
58
57
67
Wind (km/h)
20
SSE
25
SE
20
SSE
20
S
20
SSW
20
SW
20
WSW
20
WSW
20
W
20
WNW
15
W
10
W
15
WNW
15
NW
10
NNE
10
E
15
SSE
15
S
10
SSW
Wind State
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-off
off
off
off
off
off
cross-off
cross-off
cross-on
on
cross-on
cross
cross-off
High Tide
6:16PM2.36m
6:46AM2.08m
7:11PM2.30m
7:48AM1.98m
8:06PM2.27m
Low Tide
1:16AM0.17m
1:32PM0.30m
2:14AM0.19m
2:28PM0.38m
cloud
light rain
light rain
light rain
cloud
cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:14
8:13
 mm
4
5
3
Temp °C
21
19
20
21
21
21
25
28
27
24
20
17
16
17
21
21
21
19
19
Feels °C
19
17
20
21
21
21
24
26
25
21
17
15
13
13
18
18
17
16
17
  • 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 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Plum Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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