Costellos Surf Break

Lat Long: 42.95° N 70.78° W

Costellos Surf Forecast and Surf Report

Issued: 1 pm 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Costellos sea temperature is
18.5° C
0.1° 

Costellos surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Costellos surf forecast from 19 Jul 2026:

  • Best quality surf: Wednesday 22 Jul, 8PM (local time) - 7ft (2.1m), 8s period, SSE swell with offshore winds.
  • Most powerful swell: Wednesday 22 Jul, 8PM (local time) - 7ft (2.1m), 8s period, SSE swell with 481 kJ wave energy.
  • Next surfable swell (1★+): Sunday 19 Jul, 5AM (local time) - 4.5ft (1.3m), 7s period with SSE swell.

Best Forecast Surf Conditions for Costellos this week:

The surf forecast for Costellos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 19) at 5AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.2m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Costellos in the next 16 days are 2.1m 8s and forecast to arrive on Wednesday (Jul 22) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Sunday (Jul 19) at 5AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 19th Jul)4.5ft (1.3m) 7s
Best Surf 8PM (Wed 22nd Jul)7ft (2.1m) 8s
Most Powerful 8PM (Wed 22nd Jul)7ft (2.1m) 8s

Table - best surf conditions forecast for Costellos over the next 16 days.


The Lowdown

G'day, Rusty here, your local surf reporter. Well, I've looked at the charts for our region, and I gotta be straight with you—it's a tough run ahead. We're looking at a long stretch of pretty ordinary conditions, with only a few fleeting moments that might get your hopes up. The water temp is sitting at about 65°, which is pretty average for the time of year, so no surprises there.

The first real chance you'll see is on Wednesday, the 22nd of July. The swell starts to bump up a bit, but it's a messy one. For the morning, we've got a 6ft SSE swell, but the wind is a cross-offshore from the SW, so it's trying to keep things clean. The combined energy is moderate at 290. It's still a marginal call, though. The afternoon gets a little better with a 6ft SSE swell and a 1 out of 10 score, with the energy picking up to 476. The wind stays cross-off from the SW, so it's clean. This is a reef break, so it might hold some shape, but with that swell size, it's a bit more for the experienced crew. It's a chance, but not a standout.

Thursday the 23rd of July morning is where it gets interesting, but it's fleeting. The wind drops right off to glassy conditions from the NW. We've got a 3ft SE swell with a period of 9 seconds, which is a bit of a groundswell, but it's still short enough to offer some push. The combined energy is moderate at 145. The waves are surfable, but they're just ordinary. Glassy conditions are a huge positive, though, so if you're a keen surfer, you might get a few clean ones. The crowds at Costellos can be a problem though, so don't expect to have it to yourself.

That's about it, really. After that Thursday morning, it's a wasteland. We get a few days with tiny, onshore wind-affected junk, and then a long run of poor conditions. The swell stays small, the wind is onshore or cross-onshore, and the energy is weak. The period is short, mostly around 5-8 seconds, so it's just sloppy, windswell. There's a bit of a bump in energy on the 30th of July, with a 4ft E swell and 310 energy, but the wind is cross-on from the NE, keeping it too choppy to be any good. For the rest of the run, it's a write-off. Honestly, this spot looks more interesting for the kitesurfers than paddle surfers on most of these days.

So, to sum it up: we've got a long gap of next to nothing. The only real window is that Wednesday and Thursday, with the Thursday morning being the best of a bad lot because of the glassy conditions. It's a tough call, but sometimes that's how it goes. The forecasts can change, but for now, don't sell your board.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Sat afternoon. Warm (max 27°C on Sat afternoon, min 17°C on Sun night). Winds decreasing (fresh winds from the SSW on Sat afternoon, light winds from the S by Mon afternoon).

Days 5-7 Weather Summary

Moderate rain (total 18mm), heaviest on Tue night. Warm (max 28°C on Wed afternoon, min 16°C on Wed night). Winds decreasing (fresh winds from the SSE on Tue afternoon, calm by Thu morning).

Sat
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
0
0
0
1
0
0
0
1
1
1
1
0
1
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SSE
5
1.6
S
6
0.5
SSE
6
0.4
SE
6
0.4
SE
8
0.2
SSE
8
0.6
SSE
3
0.9
S
5
0.5
SSE
3
1.2
SE
5
1.1
SE
6
1.8
SSE
7
1.9
SSE
8
1.3
SSE
7
1
SE
9
1.1
SE
8
1.1
SE
8
1
SE
8
1
SE
8
0.9
SE
8
Wave Graph
Metric surfscale
Energy kJ
113
200
23
10
16
6
8
36
7
70
67
290
476
193
145
153
149
126
125
101
Wind (km/h)
30
SSW
20
WSW
25
NW
20
NW
15
WNW
10
WNW
20
S
10
SSW
20
SSE
25
SE
10
SSE
20
SW
15
SW
15
W
5
NW
20
SSE
10
NNW
10
E
15
SE
5
NNW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross
cross-off
cross
cross-on
cross-on
cross-off
cross-off
off
glassy
cross
cross-off
on
cross-on
cross-off
High Tide
3:07PM3.46m
3:26AM3.43m
3:57PM3.37m
4:20AM3.20m
4:48PM3.25m
5:15AM2.98m
5:40PM3.14m
6:12AM2.81m
6:32PM3.05m
7:10AM2.69m
7:25PM3.00m
8:07AM2.64m
8:17PM3.00m
Low Tide
9:15PM0.40m
9:41AM0.34m
10:10PM0.51m
10:31AM0.55m
11:06PM0.64m
11:21AM0.76m
00:03AM0.74m
12:13PM0.92m
1:00AM0.81m
1:07PM1.04m
1:56AM0.84m
2:00PM1.09m
2:50AM0.82m
mod rain
rain showers
clear
clear
clear
clear
clear
part cloud
cloud
cloud
heavy rain
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:22
5:22
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:17
8:16
8:15
8:15
8:14
8:14
8:13
 mm
6
8
16
2
Temp °C
27
22
22
26
23
25
27
24
23
23
20
26
28
24
22
24
21
23
22
21
Feels °C
25
22
17
21
20
22
25
20
21
18
19
26
27
22
20
22
18
21
19
19
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 16 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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