Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 7 pm 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 3AM is: 1.4m 6s primary swell from a East-southeast direction and 0.3m 10s secondary swell from a East direction, 0.2m 10s secondary swell from a East direction (forecast issued at 07:00pm May 14). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (15 May)4.5ft (1.3m)9s
Afternoon (15 May)7ft (2.2m)10s
Evening (15 May)6ft (1.9m)10s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 8mm), mostly falling on Thu night. Warm (max 27°C on Sun afternoon, min 8°C on Fri afternoon). Wind will be generally light.

Thu
14
Friday
15
Saturday
16
Sun
17
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
5 AM
8 AM
11 AM
2 PM
Rating
(10 max)
0
1
1
0
0
0
0
0
1
3
3
3
3
2
2
2
2
1
1
0
0
1
0
1
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)
1.2
SE
6
1.3
ESE
6
1.2
ESE
6
1.4
ESE
6
1.6
E
7
1.3
SE
9
2.3
ESE
10
2.3
ESE
10
2.1
ESE
10
1.9
ESE
10
1.8
ESE
10
1.6
ESE
10
1.1
SE
10
1
SE
9
1.2
ESE
9
1.1
ESE
9
1
ESE
9
0.9
ESE
9
0.8
ESE
9
0.8
ESE
8
0.7
SE
8
0.8
S
6
0.7
SSE
8
0.5
SSE
8
Wave Graph
Metric surfscale
Energy kJ
92
100
106
165
240
235
1003
1024
863
731
637
502
222
170
253
207
172
127
99
90
72
42
68
37
Wind (km/h)
10
E
10
NE
10
NNE
10
NE
20
NE
20
NE
25
NE
25
NE
15
NNE
5
N
10
W
10
SW
10
WSW
15
WSW
15
WSW
15
SW
15
SW
10
SW
20
SW
15
SW
15
WSW
15
WNW
15
WNW
20
WNW
on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
High Tide
9:51PM3.51m
10:25AM3.25m
10:40PM3.71m
11:17AM3.36m
11:31PM3.85m
12:10PM3.43m
Low Tide
3:35PM0.56m
4:14AM0.27m
4:25PM0.45m
5:06AM0.07m
5:16PM0.37m
5:58AM-0.07m
light rain
light rain
light rain
light rain
light rain
cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
1
2
4
1
1
Temp °C
10
10
10
9
9
9
9
8
9
10
10
10
10
11
18
22
24
22
17
16
17
19
24
27
8
8
8
6
5
5
4
3
5
9
8
8
7
8
15
19
20
19
13
13
15
18
21
23
Swell 1
Height (m)
Direction
Period (s)
1.2
SE
6
0.9
E
6
1.2
ESE
6
0.3
E
10
0.9
SE
8
1.3
SE
9
2.3
ESE
10
2.3
ESE
10
2.1
ESE
10
1.9
ESE
10
1.8
ESE
10
1.6
ESE
10
1.1
SE
10
1
SE
9
1.2
ESE
9
1.1
ESE
9
1
ESE
9
0.9
ESE
9
0.8
ESE
9
1
S
6
0.8
SSE
6
0.8
S
6
0.7
SSE
8
0.5
SSE
8
Energy kJ
92
50
90
18
82
235
1003
1024
863
731
637
502
222
170
253
207
172
127
99
69
43
42
68
37
Swell 2
Height (m)
Direction
Period (s)
0.2
ESE
10
0.8
SSE
6
0.2
E
10
0.2
E
10
0.7
SE
8
0.9
SSE
10
0.9
SSE
10
0.9
SSE
10
0.9
SSE
10
1
E
9
0.9
E
10
0.8
E
10
0.5
SSE
10
0.2
SSE
11
0.1
SE
11
0.4
SSE
8
0.8
ESE
8
0.7
SE
8
0.5
ESE
8
0.4
ESE
8
0.4
ESE
8
Energy kJ
10
46
8
8
61
171
178
182
160
168
154
118
54
12
5
28
90
72
39
27
26
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
10
0.1
SE
10
0.8
SSE
10
0.2
SSE
11
0.2
SSE
11
0.4
SE
8
Energy kJ
9
4
125
11
12
17
Wind waves
Height (m)
Direction
Period (s)
1.3
ESE
6
1.2
E
6
1.4
ESE
6
1.6
E
7
1.5
E
6
0.3
WSW
2
0.3
SW
2
0.2
SSW
3
0.4
SSW
3
0.6
S
4
0.6
SSE
5
1.1
S
6
0.4
WSW
4
0.3
WSW
3
0.3
W
2
0.4
W
3
Energy kJ
100
106
165
240
171
1
1
1
3
9
19
77
5
2
1
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
1
1
1
2
1
2
3
3
3
3
2
2
2
2
1
1
1
1
1
1
1
Distance (km)
182
60
5
5
38
39
39
98
39
0
0
0
0
0
0
0
0
0
198
14
5
0
5
0
Best forecast wave conditions in New Hampshire
Rating
(10 max)
2
1
3
3
3
3
2
2
2
2
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
1
2
3
3
3
3
3
2
3
3
3
5
2
3
2
2
2
3
4
1
1
4
2
Header Global
Rating
(10 max)
5
4
6
5
5
5
5
5
5
5
5
5
4
5
5
5
5
5
4
5
8
8
9
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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