Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 am Wednesday 27 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
11.7° C
(Which is slightly warmer than usual)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 7AM is: 0.8m 7s primary swell from a South-southeast direction and 0.1m 15s secondary swell from a East direction (forecast issued at 01:00am May 27). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (27 May)2.5ft (0.7m)7s
Afternoon (27 May)2ft (0.6m)7s
Evening (27 May)1.5ft (0.5m)7s

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 19mm), heaviest on Fri night. Warm (max 27°C on Wed afternoon, min 7°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the S by Fri night).

Wednesday
27
Thursday
28
Friday
29
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
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
7
0.8
SSE
7
0.7
SSE
7
0.6
SE
7
0.6
SSE
7
0.5
SE
7
0.5
SE
7
0.6
SSE
6
0.5
SE
6
0.4
SSE
6
0.4
SE
6
0.4
SE
6
0.3
SE
6
0.2
SSE
6
0.3
SE
8
0.2
E
9
0.2
E
9
0.2
E
9
0.2
SSE
8
0.2
SSE
8
0.3
ENE
6
0.7
SSE
4
0.9
SSE
4
1.3
SSE
5
Wave Graph
Metric surfscale
Energy kJ
44
68
46
31
32
23
22
28
20
16
11
10
6
4
10
6
6
6
6
6
7
12
25
72
Wind (km/h)
20
SW
15
SW
15
WSW
15
W
20
WNW
15
NW
15
NNW
10
NNW
10
NW
10
WNW
10
N
10
ENE
10
ENE
5
ENE
0
NNE
10
NNE
5
ENE
5
WSW
10
NW
10
ENE
20
SSE
20
SSE
15
S
30
S
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
on
on
glassy
cross-on
glassy
off
cross-off
on
cross-on
cross
cross
cross
High Tide
9:11AM2.94m
9:26PM3.20m
9:59AM2.93m
10:08PM3.24m
10:43AM2.93m
10:48PM3.27m
Low Tide
3:01AM0.66m
3:12PM0.80m
3:49AM0.60m
3:56PM0.83m
4:33AM0.55m
4:37PM0.84m
clear
clear
cloud
cloud
part cloud
part cloud
clear
cloud
clear
clear
clear
rain showers
rain showers
light rain
rain showers
rain showers
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:09
5:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:09
8:10
8:12
1
3
2
1
1
5
4
Temp °C
20
18
20
25
27
26
22
18
14
13
15
15
14
15
16
13
12
10
12
15
13
12
12
12
17
15
18
23
24
24
19
16
12
11
13
14
12
14
16
11
11
8
10
12
9
8
9
7
Swell 1
Height (m)
Direction
Period (s)
0.6
SSE
5
0.8
SSE
7
0.7
SSE
7
0.6
SE
7
0.6
SSE
7
0.5
SE
7
0.5
SE
7
0.6
SSE
6
0.5
SE
6
0.4
SSE
6
0.4
SE
6
0.4
SE
6
0.3
SE
6
0.2
SSE
6
0.3
SE
8
0.2
SSE
8
0.2
SSE
8
0.3
NE
4
0.2
ENE
5
0.2
ENE
5
0.3
ENE
6
0.3
ENE
6
0.3
E
8
0.4
E
9
Energy kJ
20
68
46
31
32
23
22
28
20
16
11
10
6
4
10
6
6
3
3
3
7
6
12
24
Swell 2
Height (m)
Direction
Period (s)
0.6
SE
7
0.1
E
15
0.1
E
15
0.4
SSW
4
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
13
0.1
E
14
0.2
NNE
3
0.1
E
13
0.2
ENE
4
0.2
ENE
4
0.1
E
9
0.2
E
9
0.2
E
9
0.2
SSE
8
0.2
SSE
8
0.2
SSE
8
0.2
E
8
0.3
E
8
0.2
ENE
5
0.2
ENE
5
Energy kJ
44
4
4
6
4
4
4
4
4
1
4
1
1
2
6
6
6
6
6
5
12
3
3
Swell 3
Height (m)
Direction
Period (s)
0.1
E
15
0.1
E
15
0.1
E
14
0.1
E
14
0.1
E
13
0.1
E
6
0.1
E
11
0.1
SE
8
0.1
E
13
0.1
E
12
0.2
E
9
0.2
E
8
0.2
E
8
0.1
E
14
0.1
E
15
0.1
E
15
Energy kJ
4
4
4
4
4
1
2
3
3
3
6
6
5
4
4
4
Wind waves
Height (m)
Direction
Period (s)
0.5
SW
3
0.4
WSW
3
0.3
WSW
3
0.2
WSW
3
0.4
NW
2
0.3
N
3
0.3
NNE
3
0.4
NNE
3
0.2
NNE
3
0.3
NE
3
0.3
NE
4
0.3
NE
4
0.3
NE
4
0.2
NNW
3
0.5
SE
3
0.7
SSE
4
0.9
SSE
4
1.3
SSE
5
Energy kJ
5
3
2
1
2
1
2
4
1
2
2
3
3
1
4
12
25
72
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
Distance (km)
14
38
0
38
38
395
163
162
182
186
186
186
186
227
232
227
227
227
232
227
493
493
493
273
Best forecast wave conditions in New Hampshire
Rating
(10 max)
1
Best forecast wave conditions in United States
Rating
(10 max)
1
1
1
1
1
1
1
1
3
2
2
5
2
1
1
1
1
1
1
2
1
1
1
1
Header Global
Rating
(10 max)
9
9
7
9
6
6
6
6
9
8
9
8
7
7
6
6
5
5
5
5
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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