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Surf Forecasts:

Costellos surfForecast / New Hampshire / USA

information circle48hr Weather and Surf, issued 1 am Thursday 21 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
10.9° C
 (Which is 1.1°C warmer than normal for this time of year)

How big are the waves at Costellos today?

The current surf forecast for Costellos at 9AM is: 0.4m 9s primary swell from a Southeast direction and 0.1m 15s secondary swell from a East direction, 0.6m 4s secondary swell from a Northeast direction (forecast issued at 01:00am May 21). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (21 May)1.5ft (0.4m)9s
Afternoon (21 May)1ft (0.3m)9s
Evening (21 May)1ft (0.3m)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. Very mild (max 16°C on Thu afternoon, min 11°C on Thu night). Wind will be generally light.

Thursday
21
Friday
22
Saturday
23
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
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
Wave
Height (m)
Direction
Period (s)
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
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
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
9
0.3
SE
9
Wave Graph
Metric surfscale
Energy kJ
29
21
29
12
13
12
12
13
13
13
13
13
14
15
15
15
15
15
15
15
14
14
14
14
Wind (km/h)
15
NW
10
NNE
15
ENE
10
ESE
5
SSE
5
SW
5
WNW
10
N
15
NNE
10
N
10
NNE
10
E
15
SE
20
SSE
15
S
10
SW
5
W
5
WNW
5
NNW
10
E
15
E
10
ESE
10
SE
10
SSE
Wind State
cross-off
cross
cross-on
on
cross
cross-off
off
cross
cross
cross
cross
on
cross-on
cross-on
cross
cross-off
off
glassy
glassy
on
on
cross-on
cross-on
cross-on
High Tide
3:10AM3.67m
3:55PM3.27m
4:10AM3.50m
4:56PM3.20m
5:13AM3.32m
5:57PM3.16m
Low Tide
9:38AM0.12m
9:57PM0.57m
10:37AM0.28m
11:00PM0.66m
11:37AM0.43m
cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
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>
—
—
—
—
—
—
8:05
—
—
—
—
—
—
—
8:06
—
—
—
—
—
—
—
8:07
—
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
18
16
12
12
14
16
16
14
11
11
11
13
13
13
13
12
13
13
12
15
13
13
12
12
Feels °C
14
13
8
9
11
13
13
11
6
7
7
8
7
7
8
8
10
10
10
12
8
9
9
9
Swell 1
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.6
NE
4
0.5
ENE
5
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
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
9
0.3
SE
9
Energy kJ
29
21
29
12
13
12
12
13
13
13
13
13
14
15
15
15
15
15
15
15
14
14
14
14
Swell 2
Height (m)
Direction
Period (s)
0.3
SSE
6
0.3
SSE
6
0.1
E
15
0.3
SE
9
0.3
SE
9
0.4
NE
4
0.2
ESE
3
0.3
SSE
3
0.2
SSE
3
0.1
SE
6
0.1
SE
5
0.1
SE
5
—
—
—
0.1
SE
13
0.2
S
3
0.2
S
3
—
0.1
E
14
0.1
E
14
0.1
E
14
—
0.1
SE
13
Energy kJ
7
7
4
12
12
4
1
2
1
1
1
1
—
—
—
7
1
1
—
4
4
4
—
6
Swell 3
Height (m)
Direction
Period (s)
0.1
E
15
0.1
E
15
0.1
S
15
0.2
SSE
6
0.1
SE
14
0.1
SE
14
0.2
ENE
4
0.1
SE
6
0.1
SE
6
—
0.1
E
13
0.1
E
13
0.1
E
14
0.1
SE
13
0.1
E
14
—
0.1
E
14
0.1
E
14
0.1
E
14
—
—
—
—
—
Energy kJ
4
4
4
3
8
8
1
1
1
—
4
4
4
7
4
—
4
4
4
—
—
—
—
—
Wind waves
Height (m)
Direction
Period (s)
0.3
NW
3
0.4
NNE
3
0.6
NE
4
—
0.1
SE
5
0.4
SSE
3
0.3
S
3
—
—
0.4
NE
3
0.4
NE
3
0.3
NE
3
0.2
ESE
5
0.3
SE
2
0.3
SSE
3
0.3
S
3
—
—
—
—
—
—
0.3
SSE
2
0.2
SSE
3
Energy kJ
1
4
14
—
1
3
1
—
—
2
3
2
3
1
1
1
—
—
—
—
—
—
1
1
Nearest Offshore or Glassy
Eastons Beach (1st Beach)
Rhode Island
Scarborough State Beach
Rhode Island
Matunuck-The point
Rhode Island
K38 and 39
Rhode Island
Lighthouse-Southside
Rhode Island
Coastguards
Long Island NY
White Point Beach
Nova Scotia
Moose
Nova Scotia
Coastguards
Long Island NY
Osbourne
Nova Scotia
Osbourne
Nova Scotia
1st street
Carolina North
Boilers (Ranger Station)
Carolina North
Outer Banks Pier
Carolina North
Boiler
Carolina North
Boiler
Carolina North
Fishermans Island
Virginia
Fishermans Island
Virginia
S-Turns
Carolina North
Rodanthe Pier
Carolina North
Fishermans Island
Virginia
Wolfe Island
Lake Ontario
North Shore Breakers
Bermuda
Stony Point
Lake Ontario
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
Distance (km)
168
182
186
186
186
333
501
618
333
619
619
878
896
887
900
900
787
787
910
913
787
480
1290
457
Best forecast wave conditions in New Hampshire
Rating
(10 max)
Best forecast wave conditions in United States
Malibu
CAL - LA County
Lincoln City Nelscott Reef
Oregon North
Lincoln City Nelscott Reef
Oregon North
Fort Canby A Jetty
Washington
Fort Canby A Jetty
Washington
Elwha
Washington
Matagorda
Texas
Coronado Beaches
CAL - San Diego County
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
Tijuana Sloughs
Baja Norte
Fort Canby A Jetty
Washington
Neah Bay
Washington
Neah Bay
Washington
Cape Elizabeth
Washington
Trestles (Uppers)
CAL - Orange County
Trestles (Uppers)
CAL - Orange County
La Push
Washington
Malibu
CAL - LA County
Fishermans Island
Virginia
Fishermans Island
Virginia
Union Bay
Lake Superior
Latigo Canyon
CAL - LA County
Rating
(10 max)
1
3
3
3
3
1
1
2
2
2
2
2
3
1
1
2
2
2
3
2
1
1
2
2
Header Global
Lambe Lambe
Brazil
Lambe Lambe
Brazil
Lambe Lambe
Brazil
Tahai
Chile
Pauba
Brazil
Tahai
Chile
Barra de Guaratiba
Brazil
Itaúna
Brazil
Trial Harbour
Australia
Trial Harbour
Australia
Trial Harbour
Australia
Trial Harbour
Australia
Easter Reef
Australia
Arrawarra
Australia
Dunedin - Bobs Beach
New Zealand
Dunedin - Bobs Beach
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Papatowai
New Zealand
Black Rock
Australia
Black Rock
Australia
Chameau
Mauritius
Rating
(10 max)
5
5
5
5
5
5
4
5
7
7
7
6
5
7
5
7
7
8
8
7
6
7
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)
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View detailed surf forecast for Costellos at:
surf-forecast.com

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