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Costellos Surf Forecast
/ New Hampshire (9 breaks) / New Hampshire (9 breaks) /
Surf Forecasts:
Costellos surfForecast / New Hampshire / USA
48hr Weather and Surf, issued 7 pm Saturday 18 Apr 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
6.3° C
(Which is slightly warmer than usual)How big are the waves at Costellos today?
The current surf forecast for Costellos at 12AM is: 1.2m 7s primary swell from a East-southeast direction and 0.1m 15s secondary swell from a East direction (forecast issued at 07:00pm April 18). The wind direction is predicted to be glassy.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Apr) | - | - |
| Afternoon (19 Apr) | 2.5ft (0.8m) | 5s |
| Evening (19 Apr) | 3.5ft (1.1m) | 6s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||||||||
| 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 59 | 98 | 139 | 181 | 191 | 202 | 210 | 176 | 120 | 94 | 66 | 36 | 35 | 24 | 15 | 15 | 15 | 9 | 19 | 18 | 18 | 18 | 19 | 19 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | cross- on | glass | cross | cross | cross | off | cross- off | cross- off | off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | on | cross- on |
High Tide / height (m) | 12:43AM 3.82 | 1:20PM 3.45 | 1:33AM 3.83 | 2:13PM 3.38 | 2:26AM 3.75 | |||||||||||||||||||
Low Tide / height (m) | 6:30PM 0.31 | 7:08AM -0.04 | 7:20PM 0.33 | 8:00AM -0.03 | 8:12PM 0.41 | 8:55AM 0.06 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:52 | - | - |
| Sunset | 7:28 | - | - | - | - | - | - | - | 7:29 | - | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - | - |
 |  | | | | |  |  | |  |  | | |  | | | | |  | | |  | | | |
Rain (mm) | - | - | - | - | - | - | 1 | 7 | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 5 | 5 | 5 | 6 | 7 | 8 | 9 | 11 | 5 | 5 | 4 | 3 | 2 | 3 | 6 | 8 | 8 | 5 | 3 | 2 | 2 | 2 | 4 | 5 |
| Feels °C (?) | 0 | 2 | 3 | 4 | 5 | 5 | 6 | 8 | -1 | -1 | -1 | -3 | -3 | -2 | 0 | 3 | 1 | -1 | -2 | -3 | -3 | -2 | -1 | -2 |
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Break
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.
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