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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 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 3AM is: 1.4m 6s primary swell from a East-southeast direction and 0.3m 10s secondary swell from a East direction, 0.2m 10s secondary swell from a East direction (forecast issued at 07:00pm May 14). The wind direction is predicted to be cross-onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 4.5ft (1.3m) | 9s |
| Afternoon (15 May) | 7ft (2.2m) | 10s |
| Evening (15 May) | 6ft (1.9m) | 10s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Warm (max 27°C on Sun afternoon, min 8°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Thu 14 | Friday 15 | Saturday 16 | Sun 17 | |||||||||||||||||||||
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 6 | ESE 6 | ESE 6 | ESE 6 | E 7 | SE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | SE 8 | S 6 | SSE 8 | SSE 8 | |
92 | 100 | 106 | 165 | 240 | 235 | 1003 | 1024 | 863 | 731 | 637 | 502 | 222 | 170 | 253 | 207 | 172 | 127 | 99 | 90 | 72 | 42 | 68 | 37 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | |
High Tide | 9:51PM3.51m | 10:25AM3.25m | 10:40PM3.71m | 11:17AM3.36m | 11:31PM3.85m | 12:10PM3.43m | ||||||||||||||||||
Low Tide | 3:35PM0.56m | 4:14AM0.27m | 4:25PM0.45m | 5:06AM0.07m | 5:16PM0.37m | 5:58AM-0.07m | ||||||||||||||||||
 |  | | | |  | | | |  |  | | |  | | | | | | |  | | | | |
 | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — |
 | 7:58 | — | — | — | — | — | — | — | 7:59 | — | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | 8:00 |
1 | 2 | 4 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 10 | 11 | 18 | 22 | 24 | 22 | 17 | 16 | 17 | 19 | 24 | 27 |
8 | 8 | 8 | 6 | 5 | 5 | 4 | 3 | 5 | 9 | 8 | 8 | 7 | 8 | 15 | 19 | 20 | 19 | 13 | 13 | 15 | 18 | 21 | 23 | |
Swell 1 Height (m) Direction Period (s) | SE 6 | E 6 | ESE 6 | E 10 | SE 8 | SE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | S 6 | SSE 6 | S 6 | SSE 8 | SSE 8 |
 kJ | 92 | 50 | 90 | 18 | 82 | 235 | 1003 | 1024 | 863 | 731 | 637 | 502 | 222 | 170 | 253 | 207 | 172 | 127 | 99 | 69 | 43 | 42 | 68 | 37 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | SSE 6 | E 10 | E 10 | SE 8 | — | — | — | SSE 10 | SSE 10 | SSE 10 | SSE 10 | E 9 | E 10 | E 10 | SSE 10 | SSE 11 | SE 11 | SSE 8 | ESE 8 | SE 8 | ESE 8 | ESE 8 | ESE 8 |
| kJ | 10 | 46 | 8 | 8 | 61 | — | — | — | 171 | 178 | 182 | 160 | 168 | 154 | 118 | 54 | 12 | 5 | 28 | 90 | 72 | 39 | 27 | 26 |
Swell 3 Height (m) Direction Period (s) | — | ESE 10 | SE 10 | — | — | — | — | — | — | — | — | — | SSE 10 | — | — | — | SSE 11 | SSE 11 | — | — | — | SE 8 | — | — |
| kJ | — | 9 | 4 | — | — | — | — | — | — | — | — | — | 125 | — | — | — | 11 | 12 | — | — | — | 17 | — | — |
Wind waves Height (m) Direction Period (s) | — | ESE 6 | E 6 | ESE 6 | E 7 | E 6 | — | — | — | — | — | — | WSW 2 | SW 2 | SSW 3 | SSW 3 | S 4 | SSE 5 | S 6 | WSW 4 | WSW 3 | — | W 2 | W 3 |
| kJ | — | 100 | 106 | 165 | 240 | 171 | — | — | — | — | — | — | 1 | 1 | 1 | 3 | 9 | 19 | 77 | 5 | 2 | — | 1 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 182 | 60 | 5 | 5 | 38 | 39 | 39 | 98 | 39 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 198 | 14 | 5 | 0 | 5 | 0 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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