- Forecast
- Maps
- Live
- Weather State
- Spot Information
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 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 1AM is: 1.7m 10s primary swell from a East-southeast direction and 0.8m 10s secondary swell from a South-southeast direction (forecast issued at 07:00pm May 15). The wind direction is predicted to be offshore and the swell rating is 3.
| 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 27°C on Sun afternoon, min 10°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 15 | Saturday 16 | Sunday 17 | Mon 18 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SSE 6 | ESE 8 | ESE 8 | S 6 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | |
833 | 731 | 637 | 502 | 416 | 307 | 253 | 212 | 161 | 127 | 130 | 92 | 62 | 40 | 86 | 69 | 53 | 53 | 31 | 31 | 21 | 29 | 29 | 28 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | on | glassy | on | cross-on | cross-on | |
High Tide | 10:40PM3.71m | 11:17AM3.36m | 11:31PM3.85m | 12:10PM3.43m | 00:23AM3.92m | 1:04PM3.44m | ||||||||||||||||||
Low Tide | 4:25PM0.45m | 5:06AM0.07m | 5:16PM0.37m | 5:58AM-0.07m | 6:08PM0.32m | 6:51AM-0.12m | ||||||||||||||||||
 |  |  | | |  | | | | |  | | | | | |  | | | | | | | | |
 | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — |
 | 7:59 | — | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | 8:01 |
1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 10 | 11 | 11 | 11 | 10 | 12 | 18 | 22 | 24 | 21 | 17 | 17 | 17 | 18 | 23 | 26 | 27 | 23 | 20 | 16 | 15 | 14 | 14 | 16 |
8 | 9 | 9 | 9 | 7 | 9 | 15 | 18 | 20 | 18 | 12 | 13 | 15 | 16 | 20 | 22 | 24 | 21 | 18 | 15 | 14 | 12 | 10 | 11 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | S 6 | SSE 6 | S 6 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
 kJ | 833 | 731 | 637 | 502 | 416 | 307 | 253 | 212 | 161 | 127 | 90 | 69 | 43 | 34 | 86 | 69 | 53 | 53 | 31 | 31 | 21 | 29 | 29 | 28 |
Swell 2 Height (m) Direction Period (s) | SSE 11 | SSE 9 | SSE 10 | SSE 9 | SE 10 | SE 9 | SSE 9 | SSE 9 | SSE 9 | SE 11 | SE 11 | ESE 8 | ESE 8 | ESE 8 | E 8 | SE 10 | — | — | SSE 4 | SSE 4 | SSE 5 | — | E 14 | E 14 |
| kJ | 196 | 113 | 182 | 100 | 102 | 21 | 45 | 47 | 30 | 5 | 5 | 92 | 62 | 40 | 12 | 4 | — | — | 2 | 4 | 2 | — | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSE 9 | — | — | — | SSE 11 | — | — | SSE 9 | SSE 8 | — | — | — | — | E 15 | E 15 | E 15 | E 15 | — | E 18 |
| kJ | — | — | — | — | — | 46 | — | — | — | 12 | — | — | 16 | 25 | — | — | — | — | 4 | 4 | 4 | 4 | — | 6 |
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 | W 2 | WSW 3 | — | — | — | — | NNE 3 | — | NE 3 | — | ESE 3 |
| kJ | — | — | — | — | 1 | 1 | 1 | 3 | 9 | 40 | 130 | 3 | 3 | 1 | 4 | — | — | — | — | 1 | — | 2 | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 4 | 1290 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 38 | 163 | 162 | 186 | 186 | 493 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Costellos surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest