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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 Thursday 21 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
10.9° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 12AM is: 0.3m 9s primary swell from a Southeast direction and 0.2m 6s secondary swell from a South-southeast direction (forecast issued at 07:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | - | - |
| Afternoon (22 May) | 1ft (0.3m) | 9s |
| Evening (22 May) | 1ft (0.3m) | 9s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Very mild (max 16°C on Thu night, min 8°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 7 | SE 7 | SE 7 | SE 4 | |
12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 5 | 8 | 18 | 10 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | cross | cross | cross | cross-on | on | cross-on | cross-on | cross | cross-off | glassy | glassy | cross-on | on | on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | |
High Tide | 3:55PM3.27m | 4:10AM3.50m | 4:56PM3.20m | 5:13AM3.32m | 5:57PM3.16m | 6:16AM3.16m | ||||||||||||||||||
Low Tide | 9:57PM0.57m | 10:37AM0.28m | 11:00PM0.66m | 11:37AM0.43m | 00:05AM0.72m | 12:36PM0.56m | ||||||||||||||||||
 | |  | | |  | | |  | |  | | | | | | | |  | | | | |  | |
 | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — |
 | — | 8:05 | — | — | — | — | — | — | — | 8:06 | — | — | — | — | — | — | — | 8:07 | — | — | — | — | — | 8:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | |
Temp °C | 16 | 16 | 13 | 10 | 10 | 10 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 11 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 8 |
13 | 12 | 9 | 5 | 5 | 5 | 8 | 7 | 7 | 7 | 9 | 9 | 9 | 8 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 8 | 7 | 5 | |
Swell 1 Height (m) Direction Period (s) | NE 5 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | NE 4 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 7 | SE 7 | SE 9 | SE 9 |
 kJ | 6 | 12 | 13 | 13 | 13 | 13 | 14 | 4 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 5 | 8 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | SE 9 | ENE 4 | SSE 6 | SSE 6 | SE 6 | SE 5 | S 5 | SE 9 | ENE 4 | — | — | SSE 3 | SSE 3 | — | — | E 14 | E 14 | — | SE 13 | — | SE 9 | SE 9 | E 12 | E 18 |
| kJ | 12 | 1 | 3 | 3 | 1 | 1 | 1 | 14 | 1 | — | — | 2 | 1 | — | — | 4 | 4 | — | 6 | — | 3 | 3 | 3 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 6 | ENE 3 | E 14 | SE 13 | E 13 | E 13 | E 14 | E 14 | E 14 | SE 13 | — | — | — | E 14 | — | — | — | — | E 12 | E 12 | E 18 | E 18 | E 12 |
| kJ | 8 | 1 | 1 | 4 | 7 | 4 | 4 | 4 | 4 | 4 | 7 | — | — | — | 4 | — | — | — | — | 3 | 3 | 6 | 6 | 3 |
Wind waves Height (m) Direction Period (s) | SSE 5 | SSE 2 | — | NNE 3 | NNE 4 | NE 4 | NE 4 | — | SE 2 | SSE 3 | S 3 | — | — | — | — | — | — | — | — | — | — | — | SE 7 | SE 4 |
| kJ | 6 | 1 | — | 4 | 9 | 9 | 5 | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 18 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 321 | 289 | 237 | 338 | 619 | 878 | 870 | 938 | 938 | 951 | 938 | 848 | 815 | 804 | 787 | 1290 | 1290 | 787 | 787 | 787 | 567 | 567 | 462 | 457 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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