Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 7 am Thursday 14 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 3PM is: 1.1m 5s primary swell from a Southeast direction and 0.2m 10s secondary swell from a East-southeast direction, 0.1m 12s secondary swell from a East direction (forecast issued at 07:00am May 14). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (14 May)4ft (1.2m)5s
Afternoon (14 May)3.5ft (1.1m)5s
Evening (14 May)5ft (1.5m)6s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 17mm), heaviest on Thu night. Warm (max 23°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light.

Thursday
14
Friday
15
Saturday
16
Sun
17
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
2 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
0
0
0
2
3
3
2
2
2
1
2
1
1
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1
SSE
5
1.2
SSE
5
1.1
SE
5
1.1
SE
5
1.4
SE
6
1.5
ESE
6
1.6
ESE
6
1.8
ESE
6
1.8
ESE
7
1.9
ESE
9
2.1
ESE
10
1.9
ESE
10
2.1
ESE
10
1.8
ESE
10
1.6
ESE
10
1.6
ESE
10
1.4
ESE
10
1.3
ESE
10
1.2
ESE
9
1.1
ESE
9
1
ESE
9
0.9
ESE
9
0.8
ESE
9
1.1
S
6
Wave Graph
Metric surfscale
Energy kJ
61
69
66
58
147
164
190
252
276
554
815
692
817
603
533
463
348
312
248
188
154
124
101
85
Wind (km/h)
15
SSE
20
SSE
20
SE
20
ESE
20
ESE
20
E
25
E
20
E
15
E
15
ENE
25
NE
20
NE
15
NE
5
NNE
10
W
10
WSW
10
WSW
10
WSW
10
SW
15
SW
15
SW
15
SW
20
SW
20
SW
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
9:32AM3.12m
9:51PM3.51m
10:25AM3.25m
10:40PM3.71m
11:17AM3.36m
11:31PM3.85m
Low Tide
3:23AM0.50m
3:35PM0.56m
4:14AM0.27m
4:25PM0.45m
5:06AM0.07m
5:16PM0.37m
cloud
part cloud
cloud
part cloud
light rain
light rain
mod rain
light rain
light rain
cloud
cloud
cloud
cloud
cloud
clear
cloud
cloud
clear
clear
clear
clear
cloud
cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:58
7:59
8:00
8:00
2
2
9
3
1
Temp °C
11
12
13
12
11
10
10
9
9
9
9
9
9
9
10
10
10
11
18
21
23
21
17
16
8
8
9
8
8
6
6
5
5
6
4
5
6
7
8
8
7
8
16
18
20
18
13
12
Swell 1
Height (m)
Direction
Period (s)
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
E
10
0.2
E
10
2.1
ESE
10
1.9
ESE
10
2.1
ESE
10
1.8
ESE
10
1.6
ESE
10
1.6
ESE
10
1.4
ESE
10
1.3
ESE
10
1.2
ESE
9
1.1
ESE
9
1
ESE
9
0.9
ESE
9
0.8
ESE
9
0.7
ESE
8
Energy kJ
10
10
10
10
10
9
8
8
815
692
817
603
533
463
348
312
248
188
154
124
84
64
Swell 2
Height (m)
Direction
Period (s)
0.1
E
7
0.1
E
12
0.1
E
12
0.2
E
11
1
SE
10
0.9
SSE
10
0.7
SE
10
0.6
SE
10
0.7
SE
9
0.6
SSE
9
0.4
SE
9
0.7
SSE
9
0.5
SSE
9
0.3
SSE
8
0.1
SE
11
0.4
SSE
9
Energy kJ
1
3
3
9
196
171
92
73
90
52
21
75
42
14
5
30
Swell 3
Height (m)
Direction
Period (s)
0.1
E
13
0.2
SSE
11
0.2
SSE
11
0.2
ESE
8
Energy kJ
3
12
12
7
Wind waves
Height (m)
Direction
Period (s)
1
SSE
5
1.2
SSE
5
1.1
SE
5
1.1
SE
5
1.4
SE
6
1.5
ESE
6
1.6
ESE
6
1.8
ESE
6
1.8
ESE
7
1.9
ESE
9
0.3
WSW
2
0.3
WSW
3
0.2
SSW
3
0.4
SSW
3
0.6
S
4
0.8
SSE
5
1.2
SSE
6
1.1
S
6
Energy kJ
61
69
66
58
147
164
190
252
276
554
1
1
1
3
9
28
101
85
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
2
3
2
3
3
3
2
2
2
1
2
1
1
1
Distance (km)
350
321
198
198
182
69
60
39
39
39
39
39
39
5
0
0
0
0
0
0
0
0
92
14
Best forecast wave conditions in New Hampshire
Rating
(10 max)
3
3
3
2
2
2
1
2
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
1
1
1
2
3
2
3
3
3
3
3
3
3
2
3
3
1
2
2
3
1
Header Global
Rating
(10 max)
5
5
4
5
5
5
6
5
5
5
5
5
5
5
5
5
4
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

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