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Costellos Surf Forecast
/ New Hampshire (9 breaks) / New Hampshire (9 breaks) /
Surf Forecasts:
Costellos surfForecast / New Hampshire / USA
16 Day Weather and Surf, issued 1 pm Saturday 09 May 2026 EDTForecast 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
8.8° C
(Which is slightly warmer than usual)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 (May 10) at 2AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.5m and 9s. Another secondary swell of 0.1m and 10s 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 1.3m 9s and forecast to arrive on Friday (May 15) at 8AM. Winds are predicted to be cross-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 Tuesday (May 12) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 10th May) | 4.5ft (1.3m) 6s |
| Best Surf | 5AM (Mon 11th May) | 3ft (0.9m) 8s |
| Most Powerful | 8AM (Fri 15th May) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Costellos over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Sat night. Warm (max 20°C on Sun afternoon, min 7°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Thu morning. Very mild (max 16°C on Wed afternoon, min 9°C on Wed morning). Winds increasing (calm on Tue afternoon, fresh winds from the S by Wed afternoon). | ||||||||||||||||||||
Sat 9 | Sunday 10 | Monday 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | Friday 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 |  |  |  |  |  |  |  |  | |||||||||||||
E 9 | SSE 6 | SE 7 | SE 6 | ESE 8 | SE 10 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | SE 7 | SSE 5 | SSE 5 | SE 4 | SE 4 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | |
57 | 123 | 100 | 68 | 90 | 213 | 184 | 165 | 91 | 62 | 44 | 37 | 84 | 33 | 15 | 27 | 76 | 273 | 254 | 208 | 92 | |
Wind (km/h) | |||||||||||||||||||||
on | cross-off | off | off | off | off | cross | cross-off | glassy | glassy | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-off | off | |
High Tide | 5:44PM2.66m | 5:52AM2.80m | 6:35PM2.74m | 6:48AM2.81m | 7:25PM2.88m | 7:44AM2.88m | 8:14PM3.07m | 8:39AM2.99m | 9:02PM3.29m | 9:32AM3.12m | 9:51PM3.51m | 10:25AM3.25m | 10:40PM3.71m | 11:17AM3.36m | |||||||
Low Tide | 11:43PM1.18m | 12:16PM0.91m | 00:40AM1.10m | 1:06PM0.87m | 1:36AM0.94m | 1:56PM0.79m | 2:30AM0.74m | 2:45PM0.68m | 3:23AM0.50m | 3:35PM0.56m | 4:14AM0.27m | 4:25PM0.45m | 5:06AM0.07m | ||||||||
 |  |  |  |  |  | |  |  | | | | |  | |  | | | | | | |
 | — | — | 5:26 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:20 | — | — | 5:20 | — | — | 5:18 |
 | 7:52 | — | — | 7:52 | — | — | 7:53 | — | — | 7:54 | — | — | 7:55 | — | — | 7:58 | — | — | 7:59 | — | 8:00 |
8 | 9 | — | 1 | — | — | — | — | — | — | — | — | — | — | 6 | 5 | 1 | — | — | — | — | |
Temp °C | 9 | 12 | 15 | 20 | 16 | 13 | 15 | 13 | 12 | 15 | 13 | 13 | 16 | 13 | 10 | 12 | 11 | 12 | 14 | 14 | 21 |
7 | 9 | 13 | 17 | 12 | 9 | 11 | 10 | 9 | 13 | 10 | 9 | 10 | 6 | 6 | 9 | 8 | 10 | 11 | 11 | 19 | |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | SE 7 | SE 6 | ESE 8 | SE 10 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | SE 7 | ESE 10 | ESE 7 | ESE 7 | ESE 10 | SE 5 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
 kJ | 57 | 39 | 100 | 68 | 90 | 213 | 184 | 165 | 91 | 62 | 44 | 37 | 20 | 9 | 9 | 9 | 25 | 273 | 254 | 208 | 92 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 10 | E 8 | E 8 | SSE 8 | E 9 | ESE 10 | ESE 10 | E 15 | SE 7 | SSE 4 | SE 10 | ESE 10 | ESE 10 | ESE 10 | — | ESE 9 | — | — | SE 8 | SE 10 |
| kJ | 22 | 4 | 37 | 35 | 55 | 74 | 57 | 10 | 4 | 14 | 5 | 26 | 20 | 19 | 10 | — | 76 | — | — | 15 | 14 |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 13 | SE 11 | SE 11 | SE 10 | — | E 15 | SE 14 | — | ESE 11 | ESE 11 | — | — | E 13 | E 13 | — | — | — | — | — | SSE 7 |
| kJ | 5 | 3 | 5 | 19 | 36 | — | 4 | 8 | — | 13 | 22 | — | — | 3 | 3 | — | — | — | — | — | 5 |
Wind waves Height (m) Direction Period (s) | SSE 4 | SSE 6 | — | — | — | — | SSE 3 | NW 2 | — | — | — | SSE 4 | SSE 5 | SSE 5 | SE 4 | SE 4 | — | — | — | — | WSW 2 |
| kJ | 10 | 123 | — | — | — | — | 6 | 1 | — | — | — | 3 | 84 | 33 | 15 | 27 | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 350 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 126 | 1293 | 916 | 350 | 1290 | 0 | 123 | 129 | 0 |
Best forecast wave conditions in New Hampshire | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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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