Surf Forecasts:
Costellos surf forecast from 9 Jul 2026:
- Best quality surf: Thursday 9 Jul, 8PM (local time) - 2.5ft (0.8m), 8s period, ESE swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 8PM (local time) - 5ft (1.6m), 6s period, S swell with 152 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 8PM (local time) - 2.5ft (0.8m), 8s 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 Thursday (Jul 09) at 8PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.6m and 4s. Another secondary swell of 0.8m and 5s is also forecast. 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 1.6m 6s and forecast to arrive on Monday (Jul 13) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Monday (Jul 13) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 9th Jul) | 2.5ft (0.8m) 8s |
| Best Surf | 8PM (Thu 9th Jul) | 2.5ft (0.8m) 8s |
| Most Powerful | 8PM (Mon 13th Jul) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Costellos over the next 16 days.
G’day, Rusty here. We’ve only got one spot on the radar this time—Costellos. And I gotta tell ya, it’s a tough stretch ahead. If you’re after a proper session, you’re looking at the first couple of days, then a long dry spell. The water’s sitting at 66°, a touch warmer than usual for July, which is something.
Thursday morning (July 9) is your best bet for the next while. Costellos is a reef break, so it needs a bit of love, and we’ve got a small 3 ft ESE swell with an 8-second period—nothing flashy, combined energy is weak at 105. The wind is a light cross-offshore from the WSW at 6 mph, and that’s keeping things clean. It’s surfable, but conditions are ordinary. This break is inconsistent and can get crowded often, so you’ll have to work for your waves.
Friday morning (July 10) sees the swell drop to 2 ft from the E, and the combined energy goes with it (64). What saves it is the glassy wind from the E at just 3 mph—dead calm. That’ll give you smooth, clean little lines. Still small, but for a quick, quiet session, it’s worth a look.
After that, we hit a big gap. From Friday afternoon through to Saturday July 24, nearly two weeks, the surf just doesn’t offer anything worthwhile. Most of the time the swell is tiny—between 0.3 ft and 3 ft—mixed with cross-onshore winds, poor conditions, and zero-rated waves. There’s the odd moment of glassy wind (like the afternoon of July 18 or morning of July 19), but the energy is too weak to get you riding. It’s a long, flat run.
If you’re keen, Thursday morning (July 9) is the standout—just. The swell’s from the ESE, close to the optimum SE direction for Costellos, and the cross-off wind means decent shape. Don’t expect much size or power, but it’s the only real chance you’ve got.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 31°C on Thu afternoon, min 18°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 35°C on Tue afternoon, min 19°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thu 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | E 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSE 4 | SE 9 | SE 9 | SE 9 | SSE 6 | SE 9 | SE 9 | SE 9 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 107 | 70 | 55 | 48 | 19 | 18 | 15 | 15 | 15 | 15 | 15 | 15 | 61 | 14 | 13 | 13 | 75 | 12 | 12 | 12 | 18 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | cross-on | cross-off | cross-on | cross-on | cross | on | cross-on | off | cross-off | cross | cross-off | off | off | cross-off | off | cross-off | cross-off | cross |
High Tide | 7:00PM3.26m | 7:40AM2.89m | 8:00PM3.40m | 8:43AM2.99m | 9:00PM3.55m | 9:44AM3.12m | 9:59PM3.70m | 10:42AM3.25m | 10:56PM3.82m | 11:38AM3.38m | 11:52PM3.89m | 12:32PM3.48m | 00:47AM3.88m | 1:25PM3.52m | |||||||
Low Tide | 1:30AM0.59m | 1:39PM0.76m | 2:32AM0.44m | 2:40PM0.67m | 3:32AM0.27m | 3:41PM0.55m | 4:30AM0.11m | 4:40PM0.43m | 5:26AM-0.02m | 5:37PM0.33m | 6:19AM-0.08m | 6:32PM0.27m | 7:11AM-0.08m | ||||||||
 |  | |  |  |  | |  | | | | | |  | | | | | | | | |
 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 |
 | 8:22 | — | — | 8:22 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:20 | — | — | 8:20 | — | 8:19 |
mm | — | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 31 | 28 | 24 | 22 | 23 | 21 | 21 | 21 | 21 | 22 | 21 | 26 | 29 | 28 | 30 | 35 | 31 | 30 | 32 | 23 | 25 |
Feels °C | 30 | 29 | 25 | 24 | 25 | 19 | 18 | 20 | 19 | 19 | 18 | 24 | 26 | 26 | 28 | 32 | 29 | 29 | 31 | 25 | 22 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | S 6 | ESE 8 | E 8 | ESE 8 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 10 | SE 10 | E 7 | SE 9 | SE 9 | SE 9 | SSE 6 | S 5 | SSE 5 | SE 9 | SE 8 |
| kJ | 107 | 49 | 55 | 48 | 19 | 18 | 10 | 12 | 15 | 15 | 15 | 15 | 1 | 14 | 13 | 13 | 75 | 12 | 5 | 12 | 18 |
Swell 2 Height (m) Direction Period (s) | — | ESE 8 | SSE 5 | SSE 4 | SE 10 | SE 10 | SE 10 | SE 10 | E 8 | ENE 4 | E 8 | E 7 | — | E 8 | E 7 | E 8 | — | SE 9 | SE 9 | SSE 5 | SSE 5 |
| kJ | — | 70 | 7 | 2 | 14 | 16 | 15 | 15 | 5 | 1 | 5 | 4 | — | 1 | 1 | 1 | — | 12 | 12 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | — | SE 10 | SE 10 | SE 10 | SSE 6 | SSE 6 | ENE 4 | SSE 5 | SE 5 | E 7 | SE 5 | — | — | — | — | — | E 8 | E 16 | E 16 | E 16 | — |
| kJ | — | 4 | 4 | 4 | 4 | 3 | 1 | 2 | 1 | 4 | 1 | — | — | — | — | — | 1 | 5 | 5 | 5 | — |
Wind waves Height (m) Direction Period (s) | SSE 4 | S 6 | — | — | — | NE 4 | SE 5 | — | NE 4 | SSE 5 | SSW 2 | SSW 2 | SSE 4 | S 5 | SSW 5 | S 5 | WSW 3 | — | — | N 3 | — |
| kJ | 10 | 75 | — | — | — | 2 | 4 | — | 3 | 2 | 1 | 1 | 61 | 49 | 29 | 31 | 3 | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 92 | 0 | 0 | 38 | 227 | 186 | 618 | 618 | 619 | 618 | 338 | 567 | 1052 | 501 | 391 | 2883 | 801 | 227 | 192 | 276 |
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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