Surf Forecasts:
Costellos surf forecast from 6 Jul 2026:
- Best quality surf: Wednesday 8 Jul, 11PM (local time) - 3.5ft (1.1m), 7s period, ESE swell with cross-offshore winds.
- Most powerful swell: Tuesday 7 Jul, 8PM (local time) - 5.5ft (1.7m), 7s period, ESE swell with 259 kJ wave energy.
- Next surfable swell (1★+): Wednesday 8 Jul, 11PM (local time) - 3.5ft (1.1m), 7s period with ESE 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 Wednesday (Jul 08) at 11PM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m and 3s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Costellos in the next 16 days are 1.7m 7s and forecast to arrive on Tuesday (Jul 07) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Thursday (Jul 09) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 8th Jul) | 3.5ft (1.1m) 7s |
| Best Surf | 11PM (Wed 8th Jul) | 3.5ft (1.1m) 7s |
| Most Powerful | 8PM (Tue 7th Jul) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Costellos over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here, havin’ a look at the next couple of weeks. Gotta be straight with you – it’s a bleak stretch for the most part. We’ve got a real dry spell, with barely a whisper of a wave to get excited about.
The only show in town is Costellos, but even that’s a tough sell. It’s an exposed reef break that’s inconsistent, and we’re going to be waiting a while for anything worthwhile. The water’s a touch warmer than normal for this time of year, sitting at 65°.
The first hint of anything surfable pops up on Thursday, July 9th – the morning brings a tiny 3 ft swell from the ESE with a clean cross-off breeze, but the energy is really weak (81). It’s surfable, but just barely. Friday the 10th is similar – a morning of clean 2 ft waves from the east with an offshore breeze, but again, the energy is minimal (50).
Then we hit a massive wall of nothing. From Saturday the 11th all the way through to Wednesday the 15th, it’s a total write-off: tiny waves, windy, and choppy. A real bummer.
Now, the one session that gets my attention, and it’s the only real standout, is Thursday morning, July 16th. We finally see a proper offshore breeze from the WNW, cleaning up a 2 ft swell from the SE. The energy is still low (51), and the waves are small, but with glassy offshore conditions, that reef at Costellos might just have a few fun little lines rolling through. It’s not going to be sending anyone to the magazine cover, but it’ll be the cleanest we see in this whole window.
After that, the 17th starts with a glassy morning but tiny surf, and then it’s back to small, onshore mess all the way through to the end of the period. Nothing else worth paddling out for.
-Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Warm (max 22°C on Mon morning, min 16°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 32°C on Thu afternoon, min 18°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 6 | SE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 8 | ESE 7 | SSE 6 | E 7 | E 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 25 | 25 | 24 | 38 | 207 | 223 | 187 | 169 | 104 | 81 | 71 | 56 | 28 | 31 | 18 | 15 | 15 | 15 | 15 | 15 | 82 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross | cross-on | cross-on | cross-off | on | cross-on | glassy |
High Tide | 4:25PM3.01m | 4:42AM2.90m | 5:12PM3.07m | 5:37AM2.85m | 6:04PM3.15m | 6:37AM2.85m | 7:00PM3.26m | 7:40AM2.89m | 8:00PM3.40m | 8:43AM2.99m | 9:00PM3.55m | 9:44AM3.12m | 9:59PM3.70m | ||||||||
Low Tide | 10:08AM0.74m | 10:36PM0.86m | 10:53AM0.79m | 11:30PM0.81m | 11:43AM0.81m | 00:29AM0.72m | 12:39PM0.80m | 1:30AM0.59m | 1:39PM0.76m | 2:32AM0.44m | 2:40PM0.67m | 3:32AM0.27m | 3:41PM0.55m | 4:30AM0.11m | |||||||
 | |  |  | |  |  | |  | |  |  | | | | | | | | | | |
 | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — |
 | — | 8:23 | — | — | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:22 | — | — | 8:22 | — | — | 8:22 | — |
mm | — | — | — | 1 | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 20 | 17 | 17 | 17 | 19 | 21 | 20 | 28 | 32 | 28 | 29 | 30 | 25 | 23 | 23 | 22 | 21 | 22 | 21 |
Feels °C | 22 | 21 | 19 | 16 | 15 | 16 | 18 | 19 | 18 | 28 | 31 | 27 | 29 | 30 | 27 | 19 | 20 | 20 | 20 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SSE 4 | SSE 5 | SE 6 | SE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 8 | ESE 7 | SSE 6 | E 7 | E 8 | ESE 7 | ESE 7 | ESE 8 | E 4 | SE 10 | SE 10 | ESE 6 |
| kJ | 25 | 25 | 4 | 17 | 134 | 223 | 187 | 169 | 104 | 81 | 71 | 56 | 28 | 31 | 18 | 10 | 11 | 5 | 15 | 15 | 82 |
Swell 2 Height (m) Direction Period (s) | SSE 3 | — | SE 10 | SE 10 | E 9 | — | — | — | — | — | SE 10 | E 7 | S 5 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | E 8 | E 7 | SE 10 |
| kJ | 1 | — | 24 | 24 | 2 | — | — | — | — | — | 15 | 26 | 7 | 14 | 14 | 15 | 15 | 15 | 5 | 4 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | E 10 | E 10 | — | — | — | — | — | — | — | ESE 10 | SE 10 | SSE 4 | SSE 4 | — | S 8 | E 8 | — | S 7 | — |
| kJ | — | — | 2 | 7 | — | — | — | — | — | — | — | 10 | 15 | 2 | 2 | — | 1 | 5 | — | 1 | — |
Wind waves Height (m) Direction Period (s) | S 3 | SSE 3 | — | SE 5 | SE 6 | NE 4 | — | — | S 3 | SW 3 | S 4 | WSW 3 | — | — | — | NE 4 | E 4 | — | ENE 4 | E 4 | — |
| kJ | 1 | 1 | — | 38 | 207 | 4 | — | — | 5 | 3 | 21 | 2 | — | — | — | 12 | 8 | — | 10 | 15 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2815 | 1898 | 642 | 680 | 333 | 39 | 39 | 98 | 0 | 0 | 1170 | 601 | 0 | 395 | 227 | 186 | 186 | 619 | 503 | 1695 | 0 |
Best forecast wave conditions in New Hampshire | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.
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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