Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 pm 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
17.9° C
1.5° 

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 (31 Jul):

  • Morning surf: Morning surf (31 Jul, local time) - 1.5ft (0.5m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (31 Jul, local time) - 1.5ft (0.5m), 9s period with SE swell.
  • Evening surf: Evening surf (31 Jul, local time) - 1.5ft (0.4m), 9s period with SE swell.

The current surf forecast for Plum Island at 1AM is: 1.0m 6s primary swell from a East direction and 0.5m 9s secondary swell from a Southeast direction (forecast issued at 07:00pm July 30). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (31 Jul)1.5ft (0.5m)10s
Afternoon (31 Jul)1.5ft (0.5m)9s
Evening (31 Jul)1.5ft (0.4m)9s

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


Short Range Forecast

Mostly dry. Warm (max 28°C on Sun afternoon, min 18°C on Thu night). Wind will be generally light.

Thu
30
Friday
31
Saturday
1
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
1
1
1
1
1
1
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
Wave
Height (m)
Direction
Period (s)
1.5
ENE
6
1.4
ENE
6
1.1
ENE
6
1
E
6
0.5
SE
10
0.5
SE
10
0.5
SE
10
0.5
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
0.4
SE
9
0.4
SE
8
0.3
SE
9
0.4
SE
8
0.8
S
4
Wave Graph
Metric surfscale
Energy kJ
183
145
98
78
50
46
46
41
40
28
28
28
29
29
27
16
12
15
22
Wind (km/h)
15
ENE
10
NNE
10
NW
10
NNW
10
NW
5
NNW
5
ENE
10
ESE
20
S
15
SSW
10
SW
10
WSW
5
W
5
N
10
E
15
E
15
SE
15
S
15
SSW
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross-off
glassy
cross-on
cross
cross-off
cross-off
cross-off
glassy
glassy
on
on
cross-on
cross
cross-off
High Tide
1:15AM2.59m
1:43PM2.36m
1:52AM2.60m
2:20PM2.44m
Low Tide
7:44PM0.32m
8:14AM0.07m
8:20PM0.28m
8:47AM0.06m
8:57PM0.23m
part cloud
cloud
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:06
8:05
8:04
 mm
Temp °C
18
19
19
18
18
18
20
21
22
21
21
21
20
19
21
24
23
25
24
Feels °C
17
20
20
18
18
19
21
21
20
20
22
22
22
20
22
24
22
25
24
  • 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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