Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 pm Saturday 18 Apr 2026 EDT
Forecast update in hr  min  s Forecast update imminent
Costellos surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Costellos sea temperature is
6.3° C
(Which is slightly warmer than usual)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 9PM is: 1.1m 6s primary swell from a East-southeast direction and 0.1m 15s secondary swell from a East direction (forecast issued at 01:00pm April 18). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (18 Apr)1ft (0.3m)7s
Afternoon (18 Apr)2.5ft (0.8m)5s
Evening (18 Apr)3.5ft (1.1m)6s

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


Updates in  hr  min  s Forecast update imminent
Saturday
18
Sunday
19
Monday
20
Tuesday
21
11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM
Rating
(10 max)
0
0
0
0
0
1
0
0
2
2
0
1
1
1
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.6
E
0.8
E
0.9
ESE
1
ESE
1.1
ESE
1.2
E
1.3
E
1.3
ESE
1.4
ESE
1.3
ESE
1.2
ESE
0.8
E
0.7
E
0.6
E
0.5
E
0.5
E
0.4
ESE
0.4
ESE
0.3
E
0.6
SSE
0.4
E
0.4
E
0.4
E
0.4
ESE
Period(s) (?)455677888877777777748888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)102749851181501912022101861477052362424151581019191819
Wind
(km/h)
20
E
20
ENE
15
E
10
E
5
E
5
SSE
10
S
15
S
10
SSW
10
W
25
NNW
20
WNW
15
W
15
W
15
W
15
W
15
W
10
W
5
WSW
15
NNW
20
N
15
N
15
NNW
10
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononglasscrosscrosscross-
off
offcross-
off
offoffoffoffoffoffoffglasscross-
off
crosscrosscross-
off
cross
High Tide
/ height (m)
12:30PM
3.46
12:43AM
3.82
1:20PM
3.45
1:33AM
3.83
2:13PM
3.38
2:26AM
3.75
Low Tide
/ height (m)
6:30PM
0.31
7:08AM
-0.04
7:20PM
0.33
8:00AM
-0.03
8:12PM
0.41
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Sunrise-------5:54-------5:54-------5:52
Sunset--7:28-------7:29-------7:30-----
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
rain showers
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
Rain (mm)
--------1541------------
Temp. °C7655556791065433488974322
Feels °C (?)31123333780-1-1-2-2-13351-2-3-4-3
  • 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

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 Costellos 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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