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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 am Thursday 14 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
8.9° C
(Which is normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 3PM is: 1.1m 5s primary swell from a Southeast direction and 0.2m 10s secondary swell from a East-southeast direction, 0.1m 12s secondary swell from a East direction (forecast issued at 07:00am May 14). The wind direction is predicted to be cross-onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 May) | 4ft (1.2m) | 5s |
| Afternoon (14 May) | 3.5ft (1.1m) | 5s |
| Evening (14 May) | 5ft (1.5m) | 6s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Thu night. Warm (max 23°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 14 | Friday 15 | Saturday 16 | Sun 17 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSE 5 | SSE 5 | SE 5 | SE 5 | SE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | S 6 | |
61 | 69 | 66 | 58 | 147 | 164 | 190 | 252 | 276 | 554 | 815 | 692 | 817 | 603 | 533 | 463 | 348 | 312 | 248 | 188 | 154 | 124 | 101 | 85 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 9:32AM3.12m | 9:51PM3.51m | 10:25AM3.25m | 10:40PM3.71m | 11:17AM3.36m | 11:31PM3.85m | ||||||||||||||||||
Low Tide | 3:23AM0.50m | 3:35PM0.56m | 4:14AM0.27m | 4:25PM0.45m | 5:06AM0.07m | 5:16PM0.37m | ||||||||||||||||||
 |  |  | |  |  |  | | | | | | | |  | | |  | | | | | | | |
 | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | 5:18 |
 | — | — | — | — | 7:58 | — | — | — | — | — | — | — | 7:59 | — | — | — | — | — | — | — | — | 8:00 | — | 8:00 |
— | — | — | — | 2 | 2 | 9 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 12 | 13 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 18 | 21 | 23 | 21 | 17 | 16 |
8 | 8 | 9 | 8 | 8 | 6 | 6 | 5 | 5 | 6 | 4 | 5 | 6 | 7 | 8 | 8 | 7 | 8 | 16 | 18 | 20 | 18 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
 kJ | 10 | 10 | 10 | 10 | 10 | 9 | 8 | 8 | — | — | 815 | 692 | 817 | 603 | 533 | 463 | 348 | 312 | 248 | 188 | 154 | 124 | 84 | 64 |
Swell 2 Height (m) Direction Period (s) | E 7 | — | — | E 12 | E 12 | E 11 | — | — | — | — | — | SE 10 | SSE 10 | SE 10 | SE 10 | SE 9 | SSE 9 | SE 9 | SSE 9 | — | SSE 9 | SSE 8 | SE 11 | SSE 9 |
| kJ | 1 | — | — | 3 | 3 | 9 | — | — | — | — | — | 196 | 171 | 92 | 73 | 90 | 52 | 21 | 75 | — | 42 | 14 | 5 | 30 |
Swell 3 Height (m) Direction Period (s) | E 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 11 | SSE 11 | ESE 8 |
| kJ | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 | 12 | 7 |
Wind waves Height (m) Direction Period (s) | SSE 5 | SSE 5 | SE 5 | SE 5 | SE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 9 | — | — | — | — | — | — | WSW 2 | WSW 3 | SSW 3 | SSW 3 | S 4 | SSE 5 | SSE 6 | S 6 |
| kJ | 61 | 69 | 66 | 58 | 147 | 164 | 190 | 252 | 276 | 554 | — | — | — | — | — | — | 1 | 1 | 1 | 3 | 9 | 28 | 101 | 85 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 350 | 321 | 198 | 198 | 182 | 69 | 60 | 39 | 39 | 39 | 39 | 39 | 39 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 92 | 14 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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