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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 Friday 15 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
9.1° C
(Which is normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 6AM is: 1.6m 7s primary swell from a East-southeast direction and 0.9m 7s secondary swell from a South-southeast direction (forecast issued at 01:00am May 15). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 5.5ft (1.7m) | 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 ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 9°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
ESE 6 | ESE 7 | ESE 8 | 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 9 | SE 8 | SE 8 | ESE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | |
143 | 192 | 370 | 638 | 892 | 880 | 778 | 637 | 502 | 437 | 351 | 253 | 212 | 161 | 127 | 124 | 90 | 72 | 55 | 39 | 37 | 53 | 41 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | |
High Tide | 10:25AM3.25m | 10:40PM3.71m | 11:17AM3.36m | 11:31PM3.85m | 12:10PM3.43m | |||||||||||||||||||
Low Tide | 4:14AM0.27m | 4:25PM0.45m | 5:06AM0.07m | 5:16PM0.37m | 5:58AM-0.07m | 6:08PM0.32m | ||||||||||||||||||
 | |  | | | |  | |  | |  | | | | | | | | | | | | | | |
 | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:59 | — | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 12 | 19 | 22 | 24 | 21 | 17 | 17 | 17 | 18 | 24 | 26 | 27 | 24 | 20 |
7 | 7 | 7 | 6 | 5 | 6 | 7 | 9 | 8 | 7 | 9 | 17 | 19 | 20 | 18 | 13 | 14 | 15 | 17 | 20 | 21 | 23 | 21 | 17 | |
Swell 1 Height (m) Direction Period (s) | ESE 6 | ESE 7 | ESE 8 | 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 9 | SSE 6 | S 6 | S 6 | SSE 8 | SE 8 | SE 8 | SE 8 |
 kJ | 143 | 192 | 370 | 638 | 892 | 880 | 778 | 637 | 502 | 437 | 351 | 253 | 212 | 161 | 127 | 124 | 90 | 43 | 31 | 18 | 37 | 53 | 41 | 40 |
Swell 2 Height (m) Direction Period (s) | E 10 | SSE 7 | — | — | SE 10 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | E 9 | SSE 9 | SSE 9 | — | SE 11 | SE 11 | SSE 10 | SE 8 | SE 8 | ESE 8 | ESE 8 | — | — | E 15 |
| kJ | 18 | 83 | — | — | 151 | 196 | 178 | 182 | 103 | 127 | 133 | 45 | 47 | — | 5 | 5 | 10 | 72 | 55 | 39 | 26 | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | — | SE 8 | — | — | — | — | — | — | — | — | SSE 9 | — | — | — | SSE 11 | SSE 11 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SE 10 | — | — | — |
| kJ | — | 63 | — | — | — | — | — | — | — | — | 29 | — | — | — | 12 | 12 | 14 | 14 | 26 | 17 | 4 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WSW 2 | — | SSW 2 | S 3 | S 4 | SSE 5 | S 6 | S 6 | WSW 3 | SW 4 | S 6 | — | NW 2 | NNW 3 | N 2 |
| kJ | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 3 | 9 | 27 | 77 | 85 | 2 | 1 | 35 | — | 1 | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 5 | 5 | 39 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 92 | 14 | 0 | 0 | 0 | 0 | 5 | 38 | 162 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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