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Costellos Surf Forecast
/ New Hampshire (9 breaks) / New Hampshire (9 breaks) /
Costellos surfForecast / New Hampshire / USA
12 Day Weather and Surf, issued 7 pm Saturday 12 Jul 2025 EDT
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 Monday (Jul 14) at 2AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.2m and 9s. Another secondary swell of 0.1m and 8s 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 12 days are 1.2m 5s and forecast to arrive on Sunday (Jul 13) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Jul 15) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 14th Jul) | 3ft (0.9m) 5s |
| Best Surf | 2AM (Mon 14th Jul) | 3ft (0.9m) 5s |
| Most Powerful | 11PM (Sun 13th Jul) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Costellos over the next 12 days.
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thu 24 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 4 | 4 | 4 | 5 | 6 | 4 | 5 | 6 | 6 | 5 | 5 | 4 | 5 | 5 | 3 | 4 | 6 | 4 | 5 | 4 | 6 | 8 | 8 | 8 | 9 | 9 | 3 | 4 | 9 | 5 | 5 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 38 | 21 | 30 | 51 | 30 | 33 | 78 | 23 | 34 | 40 | 20 | 20 | 77 | 16 | 22 | 28 | 23 | 26 | 42 | 16 | 20 | 30 | 15 | 14 | 16 | 16 | 13 | 29 | 20 | 86 | 96 | 56 | 50 | 29 | 20 | 12 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- off | cross | cross | cross- off | cross | cross- on | cross- off | cross- on | cross- on | cross- off | cross- off | off | cross- off | cross- off | on | cross | on | cross- on | cross- off | cross- off | glass | cross- off | glass | cross | off | cross | cross | cross- off | off | glass | off | cross- off | cross- off |
High Tide / height (m) | 1:13AM 3.39 | 1:48PM 3.10 | 1:57AM 3.37 | 2:31PM 3.16 | 2:43AM 3.31 | 3:16PM 3.22 | 3:32AM 3.23 | 4:04PM 3.26 | 4:25AM 3.13 | 4:55PM 3.29 | 5:24AM 3.04 | 5:51PM 3.32 | 6:26AM 2.97 | 6:51PM 3.36 | 7:32AM 2.96 | 7:52PM 3.42 | 8:37AM 2.99 | 8:53PM 3.50 | 9:38AM 3.06 | 9:52PM 3.58 | 10:35AM 3.15 | 10:47PM 3.65 | 11:28AM 3.23 | |||||||||||||
Low Tide / height (m) | 7:37AM 0.38 | 7:46PM 0.68 | 8:18AM 0.39 | 8:33PM 0.64 | 9:01AM 0.43 | 9:23PM 0.62 | 9:47AM 0.49 | 10:17PM 0.61 | 10:36AM 0.57 | 11:14PM 0.59 | 11:30AM 0.64 | 12:16AM 0.56 | 12:29PM 0.70 | 1:20AM 0.50 | 1:31PM 0.72 | 2:24AM 0.42 | 2:34PM 0.70 | 3:25AM 0.32 | 3:34PM 0.64 | 4:23AM 0.23 | 4:32PM 0.57 | 5:16AM 0.16 | 5:26PM 0.50 | |||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thu 24 | |||||||||||||||||||||||||
| Sunrise | - | 5:15 | - | - | 5:16 | - | - | 5:16 | - | - | 5:18 | - | - | 5:18 | - | - | 5:18 | - | - | 5:20 | - | - | 5:20 | - | - | 5:22 | - | - | 5:22 | - | - | 5:24 | - | - | 5:24 | - |
| Sunset | - | - | 8:21 | - | - | 8:20 | - | - | 8:20 | - | - | 8:19 | - | - | 8:17 | - | - | 8:17 | - | - | 8:16 | - | - | 8:15 | - | - | 8:15 | - | - | 8:14 | - | - | 8:14 | - | - | 8:13 |
 |  | |  | |  |  |  | | | | | | | |  |  |  |  | | | | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | 1 | 2 | 1 | - | - | - | - | - | - | - | - | - | 5 | 1 | - | - | - | 2 | 17 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 21 | 22 | 21 | 25 | 27 | 24 | 25 | 27 | 26 | 27 | 29 | 29 | 30 | 34 | 31 | 28 | 27 | 24 | 23 | 25 | 25 | 23 | 19 | 20 | 22 | 24 | 23 | 24 | 25 | 24 | 29 | 32 | 28 | 26 | 31 |
| Feels °C (?) | 18 | 21 | 21 | 20 | 25 | 26 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 31 | 34 | 33 | 30 | 29 | 27 | 25 | 25 | 28 | 26 | 20 | 22 | 21 | 21 | 21 | 23 | 21 | 20 | 29 | 31 | 30 | 28 | 31 |
Short Range Forecast: Light rain (total 4mm), mostly falling on Mon afternoon. Warm (max 27°C on Mon afternoon, min 17°C on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Fri afternoon. Warm (max 34°C on Thu afternoon, min 23°C on Tue night). Wind will be generally light. | Days 6-9 Weather Summary Heavy rain (total 20mm), heaviest during Sun afternoon. Warm (max 25°C on Sat afternoon, min 17°C on Sun night). Wind will be generally light. | Long Range Forecast: Light rain (total 2mm), mostly falling on Thu night. Warm (max 32°C on Wed afternoon, min 17°C on Mon night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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 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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