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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 Saturday 16 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
9.2° C
(Which is normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 1PM is: 1.1m 9s primary swell from a East-southeast direction and 0.5m 9s secondary swell from a South-southeast direction (forecast issued at 07:00am May 16). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 4.5ft (1.3m) | 10s |
| Afternoon (16 May) | 3.5ft (1.1m) | 9s |
| Evening (16 May) | 3ft (0.9m) | 9s |
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 26°C on Sun afternoon, min 12°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SSE 6 | S 6 | S 6 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 9 | |
416 | 305 | 253 | 212 | 161 | 127 | 101 | 95 | 71 | 54 | 105 | 67 | 53 | 40 | 31 | 42 | 38 | 29 | 28 | 28 | 20 | 20 | 20 | 14 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | on | glassy | on | cross-on | cross-on | cross-on | cross | cross | cross-off | |
High Tide | 11:17AM3.36m | 11:31PM3.85m | 12:10PM3.43m | 00:23AM3.92m | 1:04PM3.44m | 1:16AM3.90m | ||||||||||||||||||
Low Tide | 5:06AM0.07m | 5:16PM0.37m | 5:58AM-0.07m | 6:08PM0.32m | 6:51AM-0.12m | 7:02PM0.33m | ||||||||||||||||||
 |  | | | | |  |  | | | | | | | | | |  | | | | | | | |
 | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | 5:16 |
 | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:01 | — | 8:02 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 12 | 19 | 23 | 25 | 21 | 17 | 18 | 18 | 19 | 24 | 26 | 26 | 23 | 19 | 15 | 14 | 13 | 14 | 15 | 15 | 17 | 16 | 17 |
8 | 9 | 16 | 19 | 22 | 18 | 13 | 14 | 16 | 17 | 19 | 21 | 22 | 21 | 17 | 13 | 13 | 11 | 10 | 10 | 10 | 13 | 14 | 16 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SSE 6 | S 6 | S 6 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 4 |
 kJ | 416 | 305 | 253 | 212 | 161 | 127 | 99 | 95 | 71 | 51 | 105 | 67 | 53 | 40 | 31 | 42 | 38 | 29 | 28 | 28 | 20 | 20 | 20 | 12 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SE 10 | SSE 9 | SSE 9 | SSE 9 | SE 11 | SE 11 | E 9 | ESE 8 | SE 8 | E 8 | E 8 | E 8 | — | E 15 | E 15 | NE 3 | E 15 | — | — | — | E 13 | E 13 | SE 8 |
| kJ | 127 | 154 | 45 | 47 | 30 | 5 | 5 | 41 | 41 | 54 | 12 | 5 | 6 | — | 4 | 4 | 1 | 4 | — | — | — | 4 | 4 | 9 |
Swell 3 Height (m) Direction Period (s) | — | SSE 9 | — | — | — | — | — | SE 9 | — | — | — | — | — | E 15 | E 15 | E 15 | E 15 | — | E 15 | E 14 | E 14 | E 18 | E 17 | SE 9 |
| kJ | — | 46 | — | — | — | — | — | 26 | — | — | — | — | — | 4 | 4 | 4 | 4 | — | 4 | 4 | 4 | 6 | 6 | 14 |
Wind waves Height (m) Direction Period (s) | SW 2 | SW 3 | SW 3 | SSW 3 | S 4 | SSE 5 | SSE 6 | WSW 4 | WSW 4 | WSW 3 | WNW 3 | WNW 2 | NW 2 | — | — | NE 3 | NE 3 | — | ESE 3 | SE 3 | SE 3 | SE 3 | SSE 4 | SSW 4 |
| kJ | 1 | 3 | 2 | 3 | 9 | 26 | 101 | 3 | 10 | 4 | 2 | 1 | 1 | — | — | 1 | 3 | — | 2 | 2 | 1 | 5 | 17 | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 14 | 0 | 916 | 1290 | 14 | 0 | 0 | 0 | 5 | 5 | 38 | 165 | 38 | 38 | 38 | 333 | 493 | 493 | 493 | 14 | 227 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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