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Surf Forecasts:

Costellos surfForecast / New Hampshire / USA

information circle12 Day Weather and Surf, issued 12 pm Tuesday 25 Nov 2025 EST
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
9.3° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Costellos this week:

The surf forecast for Costellos over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Nov 26) at 7AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 1.1m and 6s. Another secondary swell of 0.3m and 9s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Costellos in the next 12 days are 1.5m 6s and forecast to arrive on Sunday (Nov 30) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Nov 30) at 4PM.

Wave TypeTime (EST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Wed 26th Nov)4.5ft (1.3m) 6s
Best Surf 7AM (Wed 26th Nov)4.5ft (1.3m) 6s
Most Powerful 7PM (Sun 30th Nov)5ft (1.5m) 6s

Table - best surf conditions forecast for Costellos over the next 12 days.

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

Short Range Forecast Moderate rain (total 12mm), heaviest on Tue night. Icy conditions (max 13°C on Wed morning, min 0°C on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Sun night. Icy conditions (max 11°C on Sun night, min -2°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri morning, calm by Sat night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
ESE
0.3
ESE
0.9
SSE
1.2
SSE
0.9
SSE
1
SSE
0.6
SSE
0.5
SE
0.4
SSE
0.4
SE
0.4
SE
0.2
SSE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.9
SSE
0.9
SSE
0.7
SSE
0.7
SE
Period(s) (?)99566788999109101010106766
Wave
Graph
(?)Metric surfscale
Energy kJ (?)25154011566108423232202093444459683538
Wind
(km/h)
15
SW
15
SSW
15
SSE
5
SSW
10
SSE
20
SW
25
WSW
20
WSW
25
SW
30
WSW
30
W
30
W
30
WNW
20
NW
10
NW
15
S
25
S
30
SSW
10
W
10
WNW
15
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		crossglasscross-
on		cross-
off		offoffcross-
off		cross-
off		offoffoffcross-
off		cross-
off		crosscrosscross-
off		offcross-
off		cross-
off
High Tide
/ height (m)
2:05PM
3.04
2:49AM
2.74
2:51PM
2.95
3:36AM
2.75
3:42PM
2.89
4:25AM
2.81
4:38PM
2.87
5:18AM
2.94
5:38PM
2.89
6:11AM
3.11
6:39PM
2.97
7:05AM
3.31
7:38PM
3.08
Low Tide
/ height (m)
8:34PM
0.73
8:42AM
1.09
9:19PM
0.79
9:34AM
1.09
10:06PM
0.82
10:30AM
1.04
10:57PM
0.81
11:30AM
0.92
11:51PM
0.76
12:30PM
0.73
12:46AM
0.68
1:29PM
0.51
1:41AM
0.58
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Sunrise6:47--6:48--6:48--6:50--6:50--6:52--6:52--
Sunset-4:12--4:10--4:10--4:09--4:09--4:09--4:08-
cloud
cloud
heavy rain
cloud
cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
clear
part cloud
cloud
cloud
mod rain
cloud
cloud
cloud
Rain (mm)
--12--------------8---
Temp. °C89101313137634313305811873
Feels °C (?)3591312110-1-5-5-5-7-5-4-6-21554-2
  • 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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Latest Updates

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Ben Mondy

Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

Feel that? If you are in the northern hemisphere, you will have had that first bite of winter. The lick of a frost, the chill of a cold offshore breeze and the sound of winter swells pounding the shores. If you are near the mountains, your favourite jackets, gloves, and footwear might get dusted off and prepped for battle. And in that beautiful Venn diagram, you will find PrimaLoft. They have spent over 40 years developing innovative insulations that have powered your warmest winter gear. In t

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Costellos surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Costellos at:
surf-forecast.com

Information about the Costellos Surf forecast

The above surf forecast table for Costellos provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Costellos can be found by selecting the local surf guide option on the grey menu. Our Costellos surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Costellos) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Costellos may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Costellos is 5 km (3 miles) from Hampton. If you plan a vacation in New Hampshire, look for hotels and other accommodation in Hampton. Hampton has rooms for a wide range of budgets as well as car hire and transport links.

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