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Surf Forecasts:

Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 pm Wednesday 20 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
9.8° C
 (Which is normal for this time of year)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 9PM is: 0.5m 9s primary swell from a Southeast direction and 0.1m 14s secondary swell from a East direction (forecast issued at 01:00pm May 20). 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 (20 May)1.5ft (0.4m)8s
Afternoon (20 May)1.5ft (0.4m)9s
Evening (20 May)1.5ft (0.5m)9s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast

Mostly dry. Warm (max 30°C on Wed afternoon, min 11°C on Thu night). Wind will be generally light.

Wed
20
Thursday
21
Friday
22
Sat
23
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
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
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.5
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
26
28
29
41
29
29
29
29
29
12
13
13
13
13
13
13
13
14
15
15
15
15
15
15
Wind (km/h)
25
W
25
WNW
20
WNW
15
WNW
15
NW
15
NW
10
NNW
5
NNE
15
ESE
10
SSE
10
SSE
5
SSW
5
NNW
10
NNE
10
N
10
N
10
ESE
15
SSE
20
SSE
20
S
10
SW
5
WSW
5
W
5
NE
Wind State
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross
cross
cross-off
glassy
cross
cross
cross
cross-on
cross-on
cross
cross
cross-off
glassy
glassy
cross-on
High Tide
2:56PM3.35m
3:10AM3.67m
3:55PM3.27m
4:10AM3.50m
4:56PM3.20m
5:13AM3.32m
Low Tide
8:41AM-0.01m
8:56PM0.47m
9:38AM0.12m
9:57PM0.57m
10:37AM0.28m
11:00PM0.66m
clear
part cloud
clear
cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
—
—
5:13
—
—
—
—
—
—
—
5:13
—
—
—
—
—
—
—
5:13
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
8:04
—
—
—
—
—
—
—
8:05
—
—
—
—
—
—
—
8:06
—
—
—
8:07
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
29
30
28
24
19
16
14
12
12
13
15
15
13
11
11
11
14
15
15
15
14
13
13
12
Feels °C
27
28
26
21
16
12
11
9
8
10
11
12
11
7
7
7
10
9
9
9
9
11
11
10
Swell 1
Height (m)
Direction
Period (s)
0.6
S
5
0.4
SSE
5
0.4
SE
9
0.5
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.6
NE
4
0.4
NE
4
0.3
SE
9
0.3
SE
9
0.4
SSE
3
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
S
4
0.3
S
3
0.3
SE
10
Energy kJ
17
10
29
41
29
29
29
29
16
6
13
13
4
13
13
13
13
14
15
15
15
4
2
15
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.3
SSE
5
0.1
E
14
0.3
SSE
6
0.3
SSE
6
0.4
NE
4
0.1
E
15
0.4
SE
9
0.3
SE
9
0.3
NE
4
—
0.3
SE
9
0.3
SSE
3
0.2
SSE
3
—
0.2
NNE
3
—
0.1
SE
13
0.1
SE
13
0.1
E
14
0.3
SE
10
0.3
SE
10
0.2
S
3
Energy kJ
26
28
6
4
7
7
5
4
29
12
2
—
13
2
1
—
1
—
7
7
4
15
15
1
Swell 3
Height (m)
Direction
Period (s)
0.1
E
15
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
14
0.1
NE
4
0.2
SSE
6
0.1
SE
15
0.1
E
15
0.1
SE
14
0.1
SE
14
0.1
E
15
0.1
SE
6
0.1
S
6
0.1
S
5
0.1
SE
5
0.1
SE
5
0.1
E
14
—
0.1
S
13
—
0.1
SE
13
0.1
E
14
0.1
E
14
Energy kJ
5
3
3
3
4
1
3
8
4
8
8
4
1
1
1
1
1
4
—
4
—
7
4
4
Wind waves
Height (m)
Direction
Period (s)
0.3
WSW
3
0.3
WSW
3
0.5
W
3
0.3
WNW
3
0.4
NW
3
0.3
N
3
0.5
NNE
4
0.5
NE
4
—
0.3
SE
5
0.5
SSE
3
0.5
S
3
—
—
0.4
NE
3
0.2
NNE
3
—
—
0.4
SSE
3
0.6
S
3
0.5
S
4
0.4
SSW
3
—
—
Energy kJ
2
2
4
2
2
1
11
9
—
5
5
6
—
—
2
1
—
—
2
7
6
5
—
—
Nearest Offshore or Glassy
Sands
New Jersey
Ogunquit Beach
Maine
92nd Street
Long Island NY
White Crest Beach (Wellfleet)
Massachusetts
Lecount Hollow
Massachusetts
Goosewing Beach
Rhode Island
K38 and 39
Rhode Island
K38 and 39
Rhode Island
Matunuck-The point
Rhode Island
Jetty
Long Island NY
Coastguards
Long Island NY
Moose
Nova Scotia
Indian Wells
Long Island NY
Coastguards
Long Island NY
Road K
Long Island NY
S-Turns
Carolina North
1st street
Carolina North
1st street
Carolina North
Chicahauk
Carolina North
Jennette's Pier
Carolina North
Kitty Hawk Pier
Carolina North
Lawrencetown Left Point
Nova Scotia
Fishermans Island
Virginia
Fishermans Island
Virginia
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
391
38
364
131
133
163
186
186
186
287
333
618
247
333
276
910
878
878
870
883
870
627
787
787
Best forecast wave conditions in New Hampshire
Rating
(10 max)
Best forecast wave conditions in United States
Fort Canby A Jetty
Washington
Fort Canby A Jetty
Washington
Slip Point (Clallam Bay)
Washington
Elbow Ledge
Rhode Island
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Wabasso
Florida - North
Lincoln City Nelscott Reef
Oregon North
North End
Virginia
Fort Canby A Jetty
Washington
Elwha
Washington
Chicahauk
Carolina North
Flagler
Florida - North
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Newport Point
CAL - Orange County
The Dump
Washington
Neah Bay
Washington
Neah Bay
Washington
Neah Bay
Washington
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Rating
(10 max)
4
3
1
2
1
1
1
3
1
3
1
1
1
2
2
2
2
1
1
1
1
2
2
2
Header Global
Anglet - Corsaires
France
Trial Harbour
Australia
Hanga Poukura
Chile
Mata Veri
Chile
Mata Veri
Chile
Lambe Lambe
Brazil
Lambe Lambe
Brazil
Tahai
Chile
Tahai
Chile
Pauba
Brazil
Otago Peninsula - Allans Beach
New Zealand
Easter Reef
Australia
Itaúna
Brazil
Trial Harbour
Australia
Trial Harbour
Australia
Trial Harbour
Australia
Trial Harbour
Australia
Currumbin Point
Australia
Dunedin - Bobs Beach
New Zealand
Dunedin - Bobs Beach
New Zealand
Nugget Point
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Rating
(10 max)
4
5
5
5
5
5
5
5
5
5
4
4
5
7
8
7
6
5
5
5
5
6
8
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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View detailed surf forecast for Costellos at:
surf-forecast.com

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