Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 am Wednesday 13 May 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
8.9° C
(Which is normal for this time of year)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 9AM is: 0.5m 7s primary swell from a East-southeast direction and 0.3m 10s secondary swell from a East-southeast direction, 0.5m 4s secondary swell from a Southeast direction (forecast issued at 01:00am May 13). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (13 May)1.5ft (0.5m)7s
Afternoon (13 May)1.5ft (0.4m)7s
Evening (13 May)5ft (1.6m)6s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 38mm), heaviest during Thu night. Very mild (max 16°C on Wed afternoon, min 8°C on Fri morning). Wind will be generally light.

Wednesday
13
Thursday
14
Friday
15
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
1
0
0
0
0
2
3
3
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
ESE
7
0.4
ESE
7
0.9
SSE
5
1.6
SSE
6
1.5
SSE
6
1.3
SSE
6
1.1
SSE
6
1.3
SSE
5
1.6
SE
6
1.5
SE
6
1.6
SE
6
2.2
SE
7
2.3
ESE
7
2.2
ESE
7
2.2
ESE
8
2.3
ESE
8
2.5
ESE
9
2.4
ESE
9
2
E
10
2
ESE
10
1.8
ESE
10
Wave Graph
Metric surfscale
Energy kJ
28
27
27
19
19
37
172
161
106
74
83
167
156
182
434
486
503
531
672
947
919
818
763
612
Wind (km/h)
10
NE
10
E
10
E
10
SSE
10
SSE
15
S
20
S
20
S
15
S
15
SSE
15
SSE
20
SE
15
ESE
10
ENE
15
ESE
15
ESE
15
E
15
NE
20
NE
25
NE
25
NE
15
NNE
15
NNW
10
WNW
cross-on
on
on
cross-on
cross-on
cross
cross-off
cross
cross
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
High Tide
8:39AM2.99m
9:02PM3.29m
9:32AM3.12m
9:51PM3.51m
10:25AM3.25m
10:40PM3.71m
Low Tide
2:30AM0.74m
2:45PM0.68m
3:23AM0.50m
3:35PM0.56m
4:14AM0.27m
4:25PM0.45m
cloud
cloud
cloud
cloud
light rain
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
heavy rain
heavy rain
light rain
cloud
light rain
light rain
light rain
light rain
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:20
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:55
7:58
7:59
1
1
1
3
12
14
1
1
1
2
1
Temp °C
10
9
9
9
10
16
16
14
13
12
12
12
10
10
10
10
9
9
9
8
8
9
10
11
6
5
6
6
7
12
11
10
9
9
9
8
7
8
7
7
6
5
4
2
3
6
7
9
Swell 1
Height (m)
Direction
Period (s)
0.5
ESE
7
0.5
ESE
7
0.5
ESE
7
0.4
ESE
7
0.4
ESE
7
0.4
ESE
7
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.6
SE
12
2.4
ESE
9
2
E
10
2
ESE
10
1.8
ESE
10
Energy kJ
27
26
27
19
19
15
10
10
10
10
10
10
10
116
919
818
763
612
Swell 2
Height (m)
Direction
Period (s)
0.4
SSE
4
0.3
SSE
4
0.4
SE
10
0.2
ESE
10
0.2
ESE
10
0.3
ESE
10
0.1
E
12
0.1
E
7
0.8
SE
11
0.9
SE
9
0.9
SE
10
1
SE
9
Energy kJ
6
4
26
10
10
20
3
1
134
144
145
173
Swell 3
Height (m)
Direction
Period (s)
0.4
SE
10
0.4
SE
10
0.2
E
7
0.2
E
3
0.2
E
3
0.1
E
13
0.3
ESE
12
Energy kJ
28
27
4
1
1
3
29
Wind waves
Height (m)
Direction
Period (s)
0.1
NE
4
0.3
ENE
2
0.5
SE
4
0.3
SSE
4
0.3
SSE
3
0.9
SSE
5
1.6
SSE
6
1.5
SSE
6
1.3
SSE
6
1.1
SSE
6
1.3
SSE
5
1.6
SE
6
1.5
SE
6
1.6
SE
6
2.2
SE
7
2.3
ESE
7
2.2
ESE
7
2.2
ESE
8
2.3
ESE
8
2.5
ESE
9
0.7
NNE
5
0.5
NNE
5
Energy kJ
1
1
8
3
1
37
172
161
106
74
83
167
156
182
434
486
503
531
672
947
22
14
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
2
2
2
3
3
3
Distance (km)
126
126
14
1608
1383
1293
916
537
609
501
198
186
301
182
182
92
44
98
39
98
98
5
0
0
Best forecast wave conditions in New Hampshire
Rating
(10 max)
3
3
3
Best forecast wave conditions in United States
Rating
(10 max)
2
2
3
2
1
1
2
1
2
3
3
3
2
2
2
2
3
3
3
3
3
3
3
3
Header Global
Rating
(10 max)
9
8
8
7
8
9
9
9
9
5
5
5
5
5
5
5
5
5
5
6
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

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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