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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 1 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 9PM is: 1.1m 6s primary swell from a East-southeast direction and 0.1m 15s secondary swell from a East direction (forecast issued at 01:00pm April 18). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 1ft (0.3m) | 7s |
| Afternoon (18 Apr) | 2.5ft (0.8m) | 5s |
| Evening (18 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 | |||||||||||||||||||||
| 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 | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 4 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 4 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 10 | 27 | 49 | 85 | 118 | 150 | 191 | 202 | 210 | 186 | 147 | 70 | 52 | 36 | 24 | 24 | 15 | 15 | 8 | 10 | 19 | 19 | 18 | 19 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | glass | cross | cross | cross- off | off | cross- off | off | off | off | off | off | off | off | glass | cross- off | cross | cross | cross- off | cross |
High Tide / height (m) | 12:30PM 3.46 | 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 | |||||||||||||||||||
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 | 5 | 4 | 1 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 7 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 9 | 10 | 6 | 5 | 4 | 3 | 3 | 4 | 8 | 8 | 9 | 7 | 4 | 3 | 2 | 2 |
| Feels °C (?) | 3 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 7 | 8 | 0 | -1 | -1 | -2 | -2 | -1 | 3 | 3 | 5 | 1 | -2 | -3 | -4 | -3 |
- Map Icons:
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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