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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 Tuesday 21 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
6.5° C
(Which is slightly warmer than usual)How big are the waves at Costellos today?
The current surf forecast for Costellos at 4PM is: 0.4m 8s primary swell from a East direction and 0.1m 13s secondary swell from a East direction, 0.6m 3s secondary swell from a Southeast direction (forecast issued at 01:00pm April 21). The wind direction is predicted to be cross-onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 1.5ft (0.4m) | 8s |
| Afternoon (21 Apr) | 1.5ft (0.4m) | 8s |
| Evening (21 Apr) | 3ft (0.9m) | 4s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 7 | 4 | 5 | 7 | 7 | 7 | 8 | 4 | 5 | 5 | 5 | 5 | 5 | 7 | 5 | 5 | 5 | 7 | 6 | 4 | 6 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 18 | 18 | 27 | 27 | 50 | 16 | 16 | 9 | 10 | 30 | 53 | 51 | 45 | 23 | 16 | 9 | 8 | 5 | 5 | 4 | 3 | 5 | 3 | 8 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 3:09PM 3.28 | 3:23AM 3.62 | 4:09PM 3.16 | 4:24AM 3.46 | 5:13PM 3.07 | 5:30AM 3.31 | ||||||||||||||||||
Low Tide / height (m) | 8:55AM 0.06 | 9:08PM 0.53 | 9:53AM 0.20 | 10:09PM 0.65 | 10:55AM 0.34 | 11:14PM 0.75 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:50 | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:47 |
| Sunset | - | - | 7:31 | - | - | - | - | - | - | - | 7:32 | - | - | - | - | - | - | - | 7:34 | - | - | - | - | - |
 | | |  | |  | |  |  | | |  | | | | |  | | |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 4 | 5 | 4 | 3 | 4 | 3 | 3 | 4 | 3 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 10 | 11 | 11 | 8 | 5 | 4 | 3 | 4 |
| Feels °C (?) | 0 | -2 | -4 | -4 | -3 | -2 | -2 | -2 | -2 | -1 | 0 | 2 | 2 | 2 | 2 | 1 | 4 | 4 | 7 | 4 | 0 | -1 | -2 | -1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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