Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 pm Saturday 09 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
8.8° C
(Which is slightly warmer than usual)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 5PM is: 0.6m 9s primary swell from a East direction and 0.5m 7s secondary swell from a Southeast direction, 0.6m 4s secondary swell from a South-southeast direction (forecast issued at 01:00pm May 09). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (09 May)2.5ft (0.8m)9s
Afternoon (09 May)2.5ft (0.7m)9s
Evening (09 May)4.5ft (1.3m)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 18mm), heaviest on Sat night. Warm (max 20°C on Sun afternoon, min 7°C on Mon night). Wind will be generally light.

Sat
9
Sunday
10
Monday
11
Tue
12
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
5 AM
8 AM
Rating
(10 max)
0
0
0
0
0
1
1
1
1
1
1
1
1
1
2
2
2
2
0
2
2
1
1
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)
0.7
ESE
9
0.7
ESE
9
0.6
E
9
1.2
SSE
5
1.4
SSE
6
1.3
SSE
6
1.5
SSE
7
1.3
SSE
7
1.1
SE
7
0.9
SE
6
0.9
SE
6
0.8
ESE
8
0.8
ESE
8
0.8
ESE
8
0.9
SE
8
0.8
SE
8
1.1
SE
10
1.3
SE
9
1.2
ESE
8
1.3
ESE
8
1.3
ESE
8
1.1
ESE
8
1
ESE
8
0.9
ESE
8
Wave Graph
Metric surfscale
Energy kJ
86
84
57
78
155
123
198
154
100
64
68
87
87
90
109
86
213
238
184
217
217
165
136
93
Wind (km/h)
10
SSE
10
ENE
10
ESE
5
SE
15
S
15
SSW
10
S
10
WSW
15
WSW
15
SW
15
WSW
10
WNW
10
WNW
10
WNW
10
NW
10
NW
10
WNW
5
SW
15
S
10
W
15
NW
15
NW
15
NW
15
NW
cross
on
on
cross-on
cross
cross-off
cross
cross-off
off
cross-off
off
off
off
off
cross-off
cross-off
off
cross-off
cross
off
cross-off
cross-off
cross-off
cross-off
High Tide
5:44PM2.66m
5:52AM2.80m
6:35PM2.74m
6:48AM2.81m
7:25PM2.88m
7:44AM2.88m
Low Tide
11:27AM0.91m
11:43PM1.18m
12:16PM0.91m
00:40AM1.10m
1:06PM0.87m
1:36AM0.94m
light rain
light rain
light rain
mod rain
rain showers
cloud
part cloud
part cloud
cloud
clear
rain showers
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:24
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:52
7:52
7:53
7:54
1
3
5
8
1
1
Temp °C
8
8
9
10
12
11
12
13
15
17
20
16
12
11
9
10
13
15
15
13
9
8
7
8
6
5
7
9
9
8
11
11
13
15
17
12
8
7
5
6
9
11
10
10
5
4
2
3
Swell 1
Height (m)
Direction
Period (s)
0.7
ESE
9
0.7
ESE
9
0.6
E
9
0.6
E
9
0.6
E
9
0.5
E
9
1.3
SSE
6
1.3
SSE
7
1.1
SE
7
0.9
SE
6
0.9
SE
6
0.8
ESE
8
0.8
ESE
8
0.8
ESE
8
0.9
SE
8
0.8
SE
8
1.1
SE
10
1.3
SE
9
1.2
ESE
8
1.3
ESE
8
1.3
ESE
8
1.1
ESE
8
1
ESE
8
0.9
ESE
8
Energy kJ
86
84
57
57
55
39
126
154
100
64
68
87
87
90
109
78
213
238
184
217
217
165
136
93
Swell 2
Height (m)
Direction
Period (s)
0.2
SSE
7
0.1
SE
11
0.5
SE
7
0.1
E
13
0.1
SE
11
0.1
SE
10
0.5
E
9
0.5
E
9
0.5
E
8
0.5
E
9
0.5
E
8
0.8
SSE
7
0.7
SE
8
0.7
SSE
8
0.8
ESE
8
0.8
E
8
0.7
E
9
0.5
E
8
0.5
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.1
SE
14
0.1
SE
14
Energy kJ
5
5
22
4
5
4
39
41
37
39
35
64
59
55
90
86
74
32
57
10
10
10
8
8
Swell 3
Height (m)
Direction
Period (s)
0.1
E
13
0.1
SE
11
0.1
E
17
0.1
E
13
0.1
E
13
0.1
SE
13
0.1
E
13
0.1
SE
11
0.2
ESE
11
0.3
SE
11
0.1
E
16
0.1
E
16
0.4
SE
10
0.4
SE
11
0.5
SE
10
0.5
ESE
10
0.1
E
15
0.1
SE
14
0.1
SE
14
0.1
SE
14
Energy kJ
4
5
6
3
3
7
3
5
12
19
5
5
36
31
50
56
4
8
8
8
Wind waves
Height (m)
Direction
Period (s)
0.4
SSE
7
0.4
SE
7
0.6
SSE
4
1.2
SSE
5
1.4
SSE
6
1.3
SSE
6
1.5
SSE
7
0.2
NNW
2
0.5
SSE
3
0.5
S
3
0.3
NW
2
0.3
NW
2
0.3
NW
2
Energy kJ
16
12
10
78
155
123
198
1
6
6
1
1
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
2
2
1
1
1
Distance (km)
198
60
364
14
198
0
14
0
0
0
0
0
0
0
0
0
0
0
123
0
0
0
0
0
Best forecast wave conditions in New Hampshire
Rating
(10 max)
1
1
1
1
1
1
1
1
2
2
2
2
2
2
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
2
2
3
3
3
3
3
1
2
2
2
3
3
3
3
3
1
2
2
3
3
3
Header Global
Rating
(10 max)
9
5
4
5
4
4
5
9
9
5
6
5
5
5
5
5
5
4
5
5
5
5
9
9
  • 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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