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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 am Monday 11 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
8.7° C
(Which is normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 9AM is: 0.9m 8s primary swell from a Southeast direction and 0.7m 8s secondary swell from a East direction, 0.2m 3s secondary swell from a North direction (forecast issued at 01:00am May 11). The wind direction is predicted to be cross-offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 3ft (0.9m) | 8s |
| Afternoon (11 May) | 2.5ft (0.8m) | 8s |
| Evening (11 May) | 2.5ft (0.8m) | 8s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 10mm), heaviest on Wed night. Very mild (max 14°C on Tue afternoon, min 8°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 11 | Tuesday 12 | Wednesday 13 | ||||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | SE 10 | SE 10 | ESE 7 | SSE 4 | SSE 6 | SSE 6 | |
76 | 70 | 107 | 86 | 101 | 84 | 84 | 66 | 101 | 161 | 136 | 130 | 91 | 72 | 62 | 57 | 42 | 42 | 28 | 28 | 27 | 31 | 163 | 178 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross | cross-on | cross | glassy | cross-off | cross-off | cross-off | cross-off | glassy | glassy | glassy | cross | cross-off | cross | cross | glassy | cross-on | cross | cross-on | cross | cross | |
High Tide | 6:48AM2.81m | 7:25PM2.88m | 7:44AM2.88m | 8:14PM3.07m | 8:39AM2.99m | 9:02PM3.29m | ||||||||||||||||||
Low Tide | 00:40AM1.10m | 1:06PM0.87m | 1:36AM0.94m | 1:56PM0.79m | 2:30AM0.74m | 2:45PM0.68m | ||||||||||||||||||
 |  |  |  | | | |  | | |  | | | | | | | | | | | |  | | |
 | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:53 | — | — | — | — | — | — | — | 7:54 | — | — | — | — | — | — | — | 7:55 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | |
Temp °C | 10 | 10 | 9 | 13 | 13 | 13 | 12 | 11 | 9 | 8 | 9 | 12 | 13 | 14 | 13 | 11 | 10 | 9 | 9 | 12 | 12 | 11 | 11 | 11 |
5 | 6 | 5 | 10 | 10 | 9 | 10 | 7 | 5 | 4 | 5 | 8 | 10 | 11 | 9 | 8 | 6 | 6 | 6 | 9 | 8 | 6 | 5 | 7 | |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 76 | 69 | 107 | 86 | 101 | 84 | 84 | 55 | 101 | 161 | 136 | 130 | 91 | 72 | 62 | 57 | 42 | 42 | 28 | 28 | 27 | 20 | 10 | 10 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | ESE 8 | E 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 15 | NNE 4 | ENE 4 | ESE 11 | ESE 11 | NE 4 | S 4 | SSE 4 | SE 10 | SE 10 | ESE 10 | — | — | — |
| kJ | 70 | 70 | 48 | 68 | 48 | 45 | 45 | 66 | 50 | 21 | 4 | 2 | 1 | 13 | 13 | 1 | 4 | 3 | 26 | 26 | 20 | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 16 | SE 10 | SE 10 | NNE 3 | — | E 15 | SE 14 | ESE 10 | SE 14 | SE 14 | — | E 15 | ESE 12 | ESE 11 | — | — | — | ESE 11 | SSE 4 | — | — | — | — | — |
| kJ | 5 | 27 | 28 | 1 | — | 4 | 8 | 36 | 8 | 8 | — | 4 | 13 | 13 | — | — | — | 22 | 1 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | N 3 | — | — | SSE 2 | S 3 | SSW 3 | — | N 3 | N 3 | — | — | SSE 3 | S 3 | S 3 | — | — | — | SSE 4 | S 3 | SSE 4 | SSE 6 | SSE 6 |
| kJ | — | — | 1 | — | — | 1 | 1 | 1 | — | 1 | 2 | — | — | 2 | 5 | 6 | — | — | — | 1 | 5 | 31 | 163 | 178 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 4 | 129 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 38 | 5 | 0 | 126 | 1898 | 1898 | 855 | 618 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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